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Benzonaphthalene derivatives, a process for their preparation and their use in therapeutic and cosmetic compositions
RE34440 Benzonaphthalene derivatives, a process for their preparation and their use in therapeutic and cosmetic compositions
Patent Drawings:

Inventor: Shroot, et al.
Date Issued: November 9, 1993
Application: 07/913,897
Filed: July 16, 1992
Inventors: Bernardon; Jean-Michel (Nice, FR)
Eustache; Jacques (Grasse, FR)
Shroot; Braham (Antibes, FR)
Assignee: Centre International de Recherches Dermatologiques (C.I.R.D.) (Valbonne, FR)
Primary Examiner: Ramsuer; Robert W.
Assistant Examiner:
Attorney Or Agent: Cushman, Darby & Cushman
U.S. Class: 514/237.5; 514/255.01; 514/319; 514/533; 514/544; 514/559; 514/569; 514/617; 514/618; 514/619; 514/62; 514/620; 514/621; 514/622; 514/63; 514/682; 514/700; 514/712; 514/717; 514/718; 514/719; 514/721; 514/730; 514/732; 514/844; 514/845; 514/859; 514/863; 514/913; 514/914
Field Of Search: 514/63; 514/237.5; 514/533; 514/544; 514/569; 514/718
International Class:
U.S Patent Documents: 4940696
Foreign Patent Documents:
Other References:









Abstract: A benzonaphthalene compound has the formula ##STR1## wherein R.sub.1 represents ##STR2## or (ii) --CH.sub.2 OH; R.sub.6 represents ##STR3## or OR.sub.7 wherein R.sub.7 represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl or polyhydroxyalkyl, r' or r" represent hydrogen, lower alkyl, mono or polyhydroxyalkyl, aryl or a residue of an amino acid or a sugar, or together form a heterocycle; R.sub.2 represents hydrogen, alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or a cycloaliphatic radial; R.sub.3 represents hydrogen, hydroxy, alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, a cycloaliphatic radical, a thiocycloaliphatic radical or --O--Si(CH.sub.3).sub.2 --R.sub.8 wherein R.sub.8 represents lower alkyl; and R.sub.4 and R.sub.5 represent hydrogen, lower alkyl, hydroxy or lower acyloxy.This compound is useful in the topical and systemic treatment of dermatologic diseases and in the treatment of the degeneration of conjunctive tissues. The compound also possesses anti-tumor activity.
Claim: What is claimed is:

1. A process for the treatment of a dermatologic, rheumatismal, respiratory or ophtalmologic disease comprising administering to a person suffering from said disease aneffective amount of a composition containing, in a pharmaceutically acceptable vehicle, as the active ingredient thereof a benzonaphthalene compound of the formula ##STR11## wherein R.sub.1 represents ##STR12## or (ii)--CH.sub.2 OH, R.sub.6 represents##STR13## or OR.sub.7 wherein R.sub.7 represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl or polyhydroxyalkyl, r' and r" represent hydrogen, lower alkyl, mono or polyhydroxyalkyl aryl or a residue of an amino acid, glucosamine,galactosamine or mannosamine, or together form a heterocycle selected from the group consisting of piperidino, piperazino, morpholino and pyrrolidino,

R.sub.2 represents hydrogen, branched or straight chain alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or a cycloaliphatic radical,

R.sub.3 represents hydrogen, hydroxy, branched or straight chain alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, a cycloaliphatic radical selected from the group consisting of 1- methylcyclohexyl and 1-adamantyl, athiocycloaliphatic radical, or --O--Si(CH.sub.3).sub.2 --R.sub.8 wherein R.sub.8 represents linear or branched alkyl,

R.sub.4 and R.sub.5 each independently represent hydrogen, lower alkyl.Iadd., hydroxy .Iaddend.or lower acyloxy. or salt thereof.

2. A cosmetic composition for both and hair hygiene comprising a cosmetically acceptable vehicle and an effective amount of as the active ingredient at least one benzonaphthalene compound of the formula ##STR14## wherein R.sub.1 represents##STR15## or (ii) --CH.sub.2 OH, R.sub.6 represents ##STR16## OR.sub.7 wherein R.sub.7 represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl or polyhydroxyalkyl, r' and r" represent hydrogen, lower alkyl, mono or polyhydroxyalkyl, aryl ora residue of an amino acid, glucosamine, galactosamine or mannosamine, or together form a heterocycle selected from the group consisting of piperidino, piperazino, morpholino and pyrrolidino,

R.sub.2 represents hydrogen, branched or straight chain alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or a cycloaliphatic radical.

R.sub.3 represents hydrogen, hydroxy, branched or straight chain alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, a cycloaliphatic radical selected from the group consisting of 1-methylcyclohexyl and 1- adamantyl, athiocycloaliphatic radical, or --O--Si(CH.sub.3).sub.2--R.sub.8 wherein R.sub.8 represents linear or branches alkyl,

R.sub.4 and R.sub.5 each independently represent hydrogen, lower alkyl.Iadd., hydroxy .Iaddend.or lower acyloxy, or a salt thereof.

3. The cosmetic composition of claim 2 wherein said active ingredient is present in an amount ranging from 0.0005 to 2 weight percent based on the total weight of said composition.

4. The cosmetic composition of claim 2 wherein said active ingredient is present in an amount ranging from 0.01 to 1 weight percent based on the total weight of said composition.
Description: EXAMPLE 1

Methyl ester of 6-(3-methylphenyl)-2-naphtholic acid. Compound of Formula II wherein R'.sub.3 .dbd.H and R'.sub.2 .dbd.--CH.sub.3 and R'.sub.6 .dbd.--OCH.sub.3

342 mg (2 mmol) of 3-bromotoluene in 4 ml of THF are converted into the corresponding magnesium form and then treated with an equivalent of zinc chloride to provide the corresponding zinc derivative. There are successfully added 310 mg (1.17mmol) of methyl 6-bromo-2- naphthoate and 10 mg (0.02 mmol) of NiCl.sub.2 /1,2-(diphenylphosphino)ethane--DPPE--as the catalyst. The reaction mixture is stirred at ambient temperature for 30 minutes and the mineral salts are then removed by passing thereaction mixture through a 2.times.3 cm silica column. The reaction mixture is then evaporated to dryness and the residue is chromatographed (HPLC column--Zorbax sil), using as the eluant, a mixture of cyclohexane (75%) and ether (25%). The productthus recovered has an Rf.dbd.0.45 (silica plate, eluant: hexane 50%, dichloromethane 50%) and crystallizes on evaporation of the chromatography solvents. The yield is 84%. Melting point--107.degree. C.

EXAMPLE 2

Methyl ester of 6-(4-tert.butyl phenyl)-2-naphthoic acid. Compound of Formula II wherein R'.sub.2 .dbd.H. R'.sub.3 .dbd.--C(CH.sub.3).sub.3 and R'.sub.6 .dbd.--OCH.sub.3

In a manner analogous to Example 1, starting with 639 mg (3.0 mmol) of 4-bromo tert.butyl benzene and 465 mg (1.75 mmol) of methyl 6-bromo-2-naphthoate, 0.30 g of the expected product is obtained. Yield--54%. Melting point --154.degree. C.

EXAMPLE 3

Methyl ester of 6-(3-tert.butyl phenyl)-2-naphthoic acid. Compound of Formula II wherein R'.sub.3 .dbd.H. R'.sub.2 .dbd.--C(CH.sub.3).sub.3 and R'.sub.6 .dbd.--OCH.sub.3

3.50 g (16.4 mmol) of 3-tert.butyl bromobenzene are added to a suspension of magnesium (0.44 g-18 m Atg) in 20 ml of dry tetrahydrofuran. The reaction is initiated by addition of an iodine crystal and continued at 50.degree. C. for 30 minutes.

2.46 g (18 mmol) of anhydrous zinc chloride dissolved in 20 ml of dry tetrahydrofuran are then added and after 15 minutes, the reaction mixture is cooled to 0.degree. C. At this point, 3.63 g (13.7 mmol) of methyl 6-bromo-2-napthoate and 86 mg(0.26 mmol) of the NiCl.sub.2 /DPPE complex are added to the reaction mixture.

After stirring for 1 hour at ambient temperature, 100 ml of water are added and the mixture is extracted with ether. After washing the organic phase with a saturated solution of sodium bicarbonate, and water, then drying (sodium sulfate) andevaporating the solvents, the resulting residue is recystallized in heptane, 3.12 g of the methyl ester of 6-(1-tert.butyl phenyl)-2-napthoic acid which melts at 138.degree. C. are obtained.

EXAMPLE 4

6-(3-tert.butyl phenyl)-2-naphthoic acid. Compound of Formula II wherein R'.sub.3 .dbd.H. R'.sub.2 .dbd.--C(CH.sub.3).sub.3 and R'.sub.6 .dbd.OH

1.0 g (3.14 mmol) of the methyl ester of 6-(3-tert.butyl phenyl)-2-naphthoic acid obtained in Example 3 is added to a mixture of 95% ethanol (40 ml) and soda (4 ml, 5N).

The mixture is heated at 60.degree. C. for 2 hours at which point 50 ml of water are added and the mixture is acidified to pH 1 with 2N HCl. The acidified mixture is then extracted with ether and the organic phase is washed with water untilneutral. After drying (sodium sulfate) and evaporation of the solvent, 6-(3-tert.butyl phenyl)-2-naphthoic acid (900 mg) which sublimes at 190.degree. C. is obtained.

EXAMPLE 5

Methyl ester of 6-[p-(1-adamantylthio)phenyl]-2-naphthoic acid. Compound of Formula II wherein R'.sub.2 .dbd.H, R'.sub.3 .dbd.1-adamantylthio and R'.sub.6 .dbd.--OCH.sub.3 (a) p-(1-adamantylthio) bromobenzene.

3.78 g (20 mmol) of p-bromothiophenol, 3.04 g (20 mmol) of 1-adamantanol and 10 ml of trifluoroacetic acid are stirred at ambient temperature for 8 hours and then poured into water. Sodium bicarbonate is added until the mixture is neutral atwhich time it is extracted with methylene chloride. The organic phase is dried and evaporated. After recrystallization in isooctane, 5.9 g of the expected product re obtained. Yield--92%. Melting point: 121.degree.-122.degree. C.

(b) Methyl ester of 6-[p-(1-adamantylthio)phenyl]-2-naphthoic acid 0.64 g (2.65 m Atg) of magnesium suspended in 10 ml of tetrathydrofuran (THF) are treated slowly with 5.7 g (17.6 mmol) of p-(1-adamanthylthio) bromobenzene. After heating atreflux for 2 hours and cooling to 20.degree. C., 2.4 g (17.6 mmol) of anhydrous Zn Cl.sub.2 are added. The mixture is stirred for one hour at 20.degree. C. at which point 2.8 g (10.4 mmol) of methyl 6-bromo-2-naphthoate are added and then 92 mg ofNiCl.sub.2 /1,2-(diphenylphosphino) ethane-DPPE complex are added.

The mixture is stirred at ambient temperature for 2 hours, poured into water, extracted with methylene chloride, washed with sodium bicarbonate, dried and then evaporated. The residue is recrystallized in a mixture of diisopropyl oxide and ethylacetate. 3.7 g of the expected product are obtained. Yield--84%. Melting point: 189.degree.-190.degree. C.

EXAMPLE 6

6-[p-(1-adamantylthio)phenyl]-2-naphthoic acid Compound of Formula II wherein R'.sub.2 .dbd.H, R'.sub.6 .dbd.OH and R'.sub.3 .dbd.1-adamantylthio

3 g (7mmol) of the ester obtained in Example 5(b) are treated with a solution of soda in methanol (150 ml, 5N). The reaction mixture is heated at reflux for 12 hours, evaporated, taken up in water and acidified with concentrated HCl. Theresulting solid is filtered and dried under a vacuo of phosphoric anhydride. The resulting white solid is pulverized in methanol at reflux, cooled and filtered. 2.5 g of the expected product are thus obtained. Yield--86%. Melting point:334.degree.-336.degree. C.

EXAMPLE 7

Methyl ester of 6-(3,4-dimethoxy phenyl)-2-naphthoic acid. Compound of Formula II wherein R'.sub.2 .dbd.R'.sub.3 .dbd.R'.sub.6 .dbd.--OCH.sub.3

0.93 g (38.3 mAtg) of magnesium in 20 ml of THF are slowly treated with 5.5 g (25.5 mmol) of 4-bromoveratrole. At the end of the addition, the mixture is heated at reflux for two hours, and then cooled. At this point 3.48 g (25.5 mmol) ofanhydrous ZnCl.sub.2 are added and the mixture is stirred one hour at ambient temperature. 3.98 g (15 mmol) of methyl 6-bromo-2-naphthoate are then added followed by the addition of 130 mg of NiCl.sub.2 /DPPE complex. The mixture is stirred for twohours at ambient temperature and then poured into water and extracted with dichloromethane. The organic phase is dried and evaporated. The residue is recyrstallized in a mixture of isopropyl ether and ethyl acetate. 3.4 g of the expected product areobtained. Yield--70%. Melting point: 147.degree.-148.degree. C. EXAMPLE 8

6-(3,4-dimethoxyphenyl-2-naphthoic acid. Compound of Formula II wherein R'.sub.2 .dbd.R'.sub.3 .dbd.-- OCH.sub.3 and R'.sub.6 .dbd.OH

2.6 g (8 mmol) of the ester obtained in Example 7 are treated with a solution of soda in methanol (200 ml, 2N). The reaction mixture is heated at reflux for 8 hours, evaporated, taken up in water, acidified with concentrated HCl, and filtered. The solid thus obtained is dried under a vacuum (on P.sub.2 O.sub.5) The resulting white solid is pulverized in methanol at reflux, cooled and then filtered. 2.3 g of the expected product are obtained.

EXAMPLE 9

Methyl ester of 6-[3-(1-adamantyl)-4-methoxy phenyl]-2-naphthoic acid. Compound of Formula II wherein R'.sub.3 --OCH.sub.3, R'.sub.2 .dbd.1-adamantyl and R'.sub.6 .dbd.OCH.sub.3

(a) 2-(1-adamantyl)-4-bromophenol

34.6 g (200 mmol) of p-bromophenol and 30.4 g (200 mmol) of 1 -adamantanol are dissolved in 100 ml of dichloromethane. To the resulting solution there are slowly added 10 ml of concentrated sulfuric acid. The mixture is stirred for 8 hours atambient temperature poured into water, neutralized with sodium bicarbonate, extracted with methylene chloride, dried and evaporated. After recrystallization in isooctane 52.8 g of the expected product are obtained. Yield--86%. Melting point:140.degree.-141.degree. C.

(b) 2 -(1-adamantyl)-4 -bromoanisole

To a suspension of sodium hydride (80% in oil, 4.32 g, 144 mmol) in 50 ml of THF, there are slowly added, while maintaining the temperature at 20.degree. C., 36.8 g (120 mmol) of 2-(1-adamanyl)-4-bromophenol. The mixture is stirred for 1 hourat ambient temperature at which point 9 ml (144 mmol) of methyl iodide are added. The mixture is then stirred for 2 hours at 20.degree. C., poured into water, extracted with ether, dried and evaporated. The product is purified by passage through asilica column (10.times.30 cm), eluting with a mixture of hexane (90%) and dichloromethane (10%). On evaporation, 26.2 g of a white solid are obtained. Yield--68%. Melting point: 138.degree.-139.degree. C.

(c) Methyl ester of 6-[3-(1-adamantyl)-4-methoxy phenyl-9 -2-naphthoic acid

To a suspension of magnesium (1.64 g, 67.5 m Atg) in 30 ml of THF, there is added a solution of 1.4 g (4.5 mmol) of 2-(1-adamantyl)-4-bromoanisole and 0.39 ml of dibromoethane of 10 ml of THF. The mixture is stirred until the reaction isinitiated and then there is slowly added a solution of 13.3 g (40.8 mmol) of 2-(1-adamantyl)4-bromoanisole in 90 ml of THF. The mixture is heated at reflux for 2 hours, and then cooled to 20.degree. C. There are then added 6.2 g (45 mmol) of anhydrousZnCl.sub.2. The mixture is stirred for 1 hour at 20.degree. C. at which point 7.95 g (30 mmol) of methyl 6-bromo-2-naphthoate are added followed by the addition of 300 g of NiCl.sub.2 /DPPE complex. The mixture is stirred again for 2 hours at20.degree. C., poured into water, extracted with CH.sub.2 Cl.sub.2, dried and evaporated. The product is isolated by column chromatography, eluting with a mixture of heptane (70%) and dichloromethane (30%) and then recrystallized in ethyl acetate. 12.2 g of the expected product are obtained. Yield--78%. Melting point: 222.degree.-223.degree. C.

EXAMPLE 10

6-[3-(1-adamantyl)-4-methoxy phenyl]-2-naphthoic acid. Compound of Formula II wherein R'.dbd.OCH.sub.3, R'.sub.2 .dbd.1-adamantyl and R'.sub.6 .dbd.OH.

10.5 g of the ester obtained in Example 9(c) are treated with a solution of soda in methanol (200 ml, 4.2N). The mixture is heated at reflux for 48 hours. The solvents are evaporated and the resulting residue is taken up in water and acidifiedwith concentrated HCl.

The solid is filtered and dried under a vacuum over phosphoric anhydride.

The resulting white solid is recrystallized in a mixture of THF and the ethylacetate. 8.2 g of the expected product are obtained. Yield--81%. Melting point: 325.degree.-327.degree. C.

EXAMPLE 11

Methyl ester of 6-[3-(1-adamantyl)-4-tert.butyl dimethylsilyloxylphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.2-adamantyl, R.sub.3 .dbd.OSi(CH.sub.3).sub.2 C.sub.3 H.sub.7 and ##STR10##

(a) 2-(adamantyl)-4-bromo-1-tert.butyldimethylsilyloxy-benzene 30.7 g of 2- adamantyl-4-bromophenol (100 mmol) are dissolved in DMF (200 ml). There are then added triethylamine (15.4 ml, 110 mmol) and 4-N,N-dimethylaminopyridine (DMAP, 500 mg, 4mmol).

To the resulting solution there is slowly added a solution of tert.butyldimethylsilyl chloride (15.7 g, 104 mmol) in DMF (100 ml). The mixture is stirred at ambient temperature for 4 hours, poured into water, extracted with ether, dried(MgSO.sub.4) and evaporated. The residue is dissolved in hexane and purified by passage through a silica column (eluant: hexane). 36.2 g (86%) of 2-adamantyl-4-bromo-1-tert.butyldimethylsilyloxybenzene are obtained. Melting print. 111.degree. C.

(b) Methyl ester of 6-[3-(1-adamantyl)-4-tert.butyldimethyl siloxyphenyl]-2-naphthoic acid 33.3 g (79 mmol) of the compound produced in part (a) above, dissolved in 200 ml of THF are slowly added to a suspension of magnesium (2.9 g 118 Atg) in 60ml of THF. Once the addition is complete, the mixture is heated at reflux for 2 hours at which point the temperature of the mixture is permitted to return to ambient temperature. 10.8 g (79 mmol) of anydrous zinc chloride are added and the mixture isstirred for one hour at ambient temperature, at which point 10.5 g (39.5 mmol) of methyl 6-bromo-2-naphthoate and 500 g of NiCl.sub.2 /DPPE complex are added. This mixture is then stirred for 2 hours at ambient temperature, poured into water, extractedwith CH.sub.2 Cl.sub.2, dried and evaporated. The residue is chromatographed on a silica column (eluant: mixture of heptane (70%) and ether (30%). 18.5 (90%) of the methyl ester of 6-3-(1-adamantyl)-4-tert.butyldimethylsilyloxyphenyl]-2-naphthoic acidare obtained. Melting point: 152.degree.-153.degree. C.

EXAMPLE 12

Methyl ester of 6[3-(1-adamantyl)-4-hydroxyphenyl 2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OH and R.sub.1 .dbd.COOCH.sub.3

17.5 g (33 mmol) of the ester produced in Example 11 are dissolved in 300 ml of THF. To this solution there is added 36.6 ml of a molar solution of tetrabutylammonium flouoride in THF. The mixture is stirred for 2 hours at ambient temperature,poured into water and extracted with CH.sub.2 Cl.sub.2. The organic phase is recovered, dried (MgSo.sub.4), and the solvents evaporated. The resulting residue is recrystallized in a mixture of ethylacetate (70%) and THF (30%) to give the expectedester. 11 g (81%). Melting point; 266.degree. C.

EXAMPLE 13

6-[3-(1-adamantyl)-4-hydroxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OH and R.sub.1 .dbd.COOH.

5 g (12 mmol) of the ester obtained in Example 12 are treated with 200 ml of methanolic soda (2N), under nitrogen, for 8 hours. The solvents are evaporated and the residue taken up in water and acidified to pH 1 (concentrated HCl). The reactionmixture is filtered, washed with water, the solid product is extracted with ethyl ether, dried (MgSO.sub.4) and evaporated. The residue is recrystallized in isoproplether, yielding 3.8 g (79%) of the expected acid. Melting point:270.degree.-271.degree. C.

EXAMPLE 14

Methyl ester of 6-[3-(1-adamantyl)-4-decyloxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.--OC.sub.10 H.sub.21 and R.sub.1 .dbd.COOCH.sub.3

(a) 2-(1-adamantyl)-4-bromo-1-decyloxy benzene

To a suspension of sodium hydride (80% in oil, 3.2 g, 104 mmol) in 100 ml of THF, there is slowly added a solution of 2-(1-adamantyl)-4-bromophenol (29 g, 95 mmol) in 200 ml of THF. The mixture is stirred until the evolution of gas ceases atwhich point 27.8 g (23 ml, 104 mmol) of 1-iododecane and 100 ml of DMF are added. The mixture it stirred for 12 hours at ambient temperature, poured into water, extracted with ether, dried and the solvents evaporated. The resulting residue is purifiedby passage through a silica column (eluant: heptane), yielding 40.7 g (96%) of 2(1-adamantyl)-4-bromo-1-decyloxybenzene. Melting point: 69.degree.-70.degree. C.

(b) Methyl ester of 6-3-(1-adamantyl)-4-decyloxyphenyl]-2-naphthoic acid

In a manner analogous to Example 9c, starting with 17.9 g (40 mmol) of the brominated derivative obtained in part (a) above, and 5.3 g of methyl 6-bromo-2-naphthoate. 7.4 g (67%) of the expected ester are obtained. Melting point:113.degree.-114.degree. C.

EXAMPLE 15

6-[3-(1-adamantyl)-4-decyloxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.--OC.sub.10 H.sub.21 and R.sub.1 .dbd.COOH

6.3 g (11 mmol) of the ester obtained in Example 14 dissolved in 200 ml of THF are treated at reflux with 200 ml or 2M methanolic soda for 4 hours. The solvents are evaporated and the residue is taken up in water, acidified to Ph 1 (concentratedHCl), filtered, washed with water and the solid is extracted with ether. The extract is dried and the solvent evaporated. The resulting residue is treated with 700 ml of ethyl acetate at reflux. On cooling 5.9 g (97%) of the expected acid areobtained. Melting point: 214.degree.-215.degree. C.

EXAMPLE 16

Methyl ester of 6-[3-(1-adamantyl)-4-hexyloxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.--OC.sub.6 H.sub.13 and R.sub.1 .dbd.--COOCH.sub.3

5.3 g (13 mmol) of the ester obtained in Example 12 are dissolved in 100 ml of DMF and added to a suspension of NaH (80% in oil; 0.46 g; 15.4 mmol) in DMF (50 ml). The mixture is stirred at ambient temperature until the evolution of gas ceases,as which point 1-iodohexane (3.26 g; 2.3 ml; 15.4 mmol) is added. This mixture is then stirred for 4 hours at ambient temperature, poured into water, extracted with ether, dried and evaporated. The residue is purified by passage through a silica column(eluant: mixture of dichloromethane--50% and hexane--50%), then recrystallized in isooctane to give 5.5 g (87%) of the expected pure product. Melting point: 129.degree.-130.degree. C.

EXAMPLE 17

6-[3-(1-adamantyl)-4-hexyloxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.--OC.sub.6 H.sub.13 and R.sub.1 .dbd.--COOH

In a manner analogous to Example 15, starting with 4.2 g (8.4 mmol) of the ester obtained in Example 16, 3.8 g (95%) of 6-[(1-adamantyl)-4-hexyloxyphenyl]-2-naphthoic acid are obtained. Melting point: 260.degree.-261.degree. C.

EXAMPLE 18

Methyl ester of 6-[3-(1-adamantyl)-4-methoxy phenyl]-4-acetoxy-1-methyl-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.CH.sub.3. R.sub.5 .dbd.--OCOCH.sub.3, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.--OCH.sub.3 and R.sub.1.dbd.--COOCH.sub.3

47.6 g (148 mmol) of 2-(1-adamantyl)-4-bromoanisole and 13.9 g (6.3 ml, 74 mmol) of dibromoethane dissolved in 100 ml of THF are added slowly to a suspension of magnesium (5.4 g, 222 mmol) in the THF (1000 ml). The mixture is brought to a refluxfor 2 hours at which point zinc chloride (20.2 g. 148 mmol) is added. The mixture is stirred for 1 hour and there are successively added 2.9 g (74 mmol) of methyl 4-acetoxy-6-bromo-1-methyl-2-naphthoate and 500 mg of NiCl.sub.2 /DPPE complex. Thismixture is stirred for 8 hours at ambient temperature, poured into a saturated aqueous solution of ammonium chloride, extracted with CH.sub.2 Cl.sub.2, dried and the solvents evaporated. The resulting residue is purified by passage through a silicacolumn (eluant: mixture of hexane, 40%, and CH.sub.2 Cl.sub.2, 60%). The resulting product is crystallized in isopropyl ether, yielding 23.5 g (64%) of the expected ester. Melting point: 201.degree.-202.degree. C.

EXAMPLE 19

6-[3-(1-adamantyl)-4-methoxyphenyl]-4-hydroxy-1-methyl-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.CH.sub.3, R.sub.5 .dbd.OH, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.COOH

23 g (46 mmol) of the ester obtained in Example 18 are treated at reflux for 12 hours with 300 ml of methanolic soda (2N). The solvents are evaporated and the residue is taken up in water and acidified to pH 1 (concentrated HCl1). The solid isfiltered, washed with water, dissolved in ethyl ether, dried (MgSO.sub.4) and evaporated The resulting residue is recrystallized in ethyl acetate to give 18.7 g (92%) of the expected acid. Melting point: 281.degree.-283.degree. C.

EXAMPLE 20

Methyl ester of 6-(1-adamantyl)-4-methoxyphenyl]-4-hydroxy-1-methyl-2-naphthoic acid Compound of Formula I wherein R.sub.4 .dbd.CH.sub.3, R.sub.5 .dbd.OH, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.COOCH.sub.3

17 g (38 mmol) of the acid obtained in Example 19 are treated for 12 hours at reflux with 200 ml of methanol containing 2 ml of sulfuric acid. The solvents are evaporated and the residue is taken up in water, extracted with ether, dried andevaporated. The residue is purified by passage through a silica column using as the eluant a 90:10 mixture of ether/THF. The product is recrystallized in ethyl acetate to obtain the expected pure ester--15 g (86%). Melting point:272.degree.-274.degree. C.

EXAMPLE 21

Methyl ester of 6[3-(1-adamantyl)-4-methoxyphenyl]-1-methyl-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.CH.sub.3, R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.--COOCH.sub.3 (a) Methyl6-[3-(1-adamantyl)-4-methoxyphenyl]-4-dimethylaminothiocarbonyloxy-1-methy l-2-naphthoate

4.56 g of the ester obtained in Example 20, dissolved in THF (100 ml) are slowly added to a suspension of sodium hydride (80% in oil, 360 mg, 12 mmol) in DMF (50 ml). The mixture is stirred for 1 hour at ambient temperature and then for 1 hourat 40.degree. C. There are then added 1.75 g (14 mmol) of dimethylthiocarbamoyl chloride, and the mixture is stirred initially at ambient temperature for 2 hours and then at 40.degree. C. for 2 hours. The reaction mixture is poured into water,extracted with ether, dried, and the solvents evaporated. The product is purified by passage through a silica column (eluant: CH.sub.2 Cl.sub.2), yielding 4 g (74%) of the expected intermediate product. Melting point: 137.degree.-138.degree. C.

(b) Methyl 6-[3-(1-adamantyl)-4-methoxyphenyl]-4-dimethyl-carbonythio-1-methyl-2-naph thoate

3.8 g (7 mmol) of the ester obtained above in part (a) are heated under nitrogen at 260.degree. C. for 0.5 hour. The residue is taken up in methylene chloride and purified by passage through a silica column (eluant: CH.sub.2 Cl.sub.2). Theresulting gum is taken up in isopropyl ether, yielding 3.3 g (87%) of the desired intermediate. Melting point: 201.degree.-202.degree.C.

(c) Methyl ester of 6-[3-(1-adamantyl)-4-methoxyphenyl]-1-methyl-2-naphthoic acid

The intermediate obtained above in part (b)--(11 g, 20 mmol) is dissolved in 500 ml of ethanol. 20 g of Raney nickel are added and the reaction mixture is heated at reflux for 4 hours. 20 g of nickel are then added and the mixture is heatedagain for 1 hour, at which point the mixture is cooled, concentrated and taken up in CH.sub.2 Cl.sub.2 (1000 ml). The precipitate is filtered and the filtrate is recovered, dried and evaporated. The product is purified by passage through a silicacolumn (eluant: CH.sub.2 Cl.sub.2) and recrystallized in a mixture of ethyl acetate (90%) and THF (10%), yielding 8 g (90%) of the methyl ester of 6-[3-adamantyl)-4-methoxyphenyl]-1-methyl-2-naphthoic acid. Melting point: 238.degree.-239.degree. C.

EXAMPLE 22

6-[3-(1-adamantyl)-4-methoxyphenyl]-1-methyl-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.CH.sub.3, R.sub.5 .dbd.H,R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.COOH.

6.8 g (15.4 mmol) of the ester obtained in Example 21(c) are treated as in Example 10 to give 5.8 g (88%) of the corresponding acid. Melting point: 300.degree.-302.degree. C.

EXAMPLE 23

6-[3-(1-adamantyl)-4-methoxyphenyl]-2-napthalene methanol. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.CH.sub.20 H

1.3 g (3 mmol) of the ester obtained in Example 9 dissolved in THF (5 ml) are treated with 171 mg (4.5 mmol) of LiAlH.sub.4. The mixture is heated at reflux, cooled and treated with a saturated aqueous solution of the double tartrate of sodiumand potassium. The reaction mixture is filtered, evaporated to dryness, and the residue is recrystallized in cyclohexane, yielding 1.0 g (83%) of the 6-13-(1-adamantyl)-4-methoxyphenyl]-2-naphthalene methanol. Melting point: 163.degree.-164.degree. C.

EXAMPLE 24

6-[3-(1-adamantyl)-4-methoxyphenyl-9 -2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.1-adamantyl, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.--CONHC.sub.2 H.sub.5 (a) 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid chloride

4.75 g (1.15 mmol) of the acid obtained in Example 10 in 200 ml of dichloromethane are treated with 2.08 g (2.3 ml, 1.15 mmol) of dicyclohexamine. The mixture is stirred at ambient temperature until dissolution. The solvents are evaporated andthe residue taken up in either. The solid thus formed is filtered (6.8 g) and then taken up in methylene chloride (50 ml). 1.37 g (0.85 ml, 1.15 mmol) of thionyl chloride are added. The salt formed is filtered and the filtrate is recovered, evaporatedand dried. The resulting solid (3.9 g) is used as such in the following step.

(b) Ethylamide of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid

1.3 g (3 mmol) of the acid chloride produced in (a) above are dissolved in 20 ml of THF. 405 mg (600 .mu.l, 9 mmol) of ethylamine are added and the mixture is stirred for 2 hours at ambient temperature. The mixture is then poured into water,extracted with CH.sub.2 Cl.sub.2, dried and evaporated. The residue is recrystallized in ethyl acetate, yielding 1.1 g (85%) of the expected ethylamide. Melting point: 220.degree.-221.degree. C.

EXAMPLE 25

Morpholide of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid

In a manner analogous to Example 24, starting with 1.3 g of acid chloride produced in part (a) of Example 24 and 780 mg (780 ml, 9 mmol) of morphine, there are obtained 1.3 g (91%) of the expected morpholide. Melting point:212.degree.-213.degree. C.

EXAMPLE 26

Methyl ester of 6-3-tert.butyl-4-methoxy phenyl]-2-naphthoic acid. Compound of Formula II wherein R'.sub.2 .dbd.tert.butyl, R'.sub.3 .dbd.R'.sub.6 .dbd.OCH.sub.3 (a) 4-bromo-2-tert.butyl anisole

3.10 g (22.6 mmol) of aluminum chloride are added all at once to a mixture of 63.5 g (339 mmol) of p-bromoanisole and 31.4 g (330 mmol) of tert.butyl chloride. The mixture is stirred at ambient temperature until the evolution of gas ceases(about 15 minutes). The mixture is then heated at 80.degree. C. for 15 minutes and poured into ice. 300 ml of water are added and the mixture is extracted with ether.

The organic phase is dried (MgSO.sub.4), the solvents evaporated and the residue purified by chromatography on a silica column (eluant: mixture of methylene chloride--10% and hexane--90%). After evaporation of the solvents, 4-bromo-2-tert.butylanisole under the form of a colorless oil which crystallized on cooling is obtained, 31.9 g (39%).

(b) Methyl ester of 6-3-tert.butyl-4-methoxy phenyl]-2-naphthoic acid

There is slowly added, drop by drop, a solution of 18.8 g (77 mmol) of 4-bromo-2-tert.butyl anisole of 2.26 g (93 mmol) of magnesium turnings and a crystal of iodine. The mixture is heated until the Grignard begins to form, at which point theremainder of the solution containing the brominated derivative is poured in a manner to maintain a regular reflux. Once the addition is complete, the mixture is heated at 40.degree. C. for 30minutes, diluted with 200 ml of THF and cooled to ambienttemperature. 12.7 g (93 mmol) of dry zinc chloride in solution in 20 ml of THF are added and the mixture is stirred for 30 minutes at ambient temperature. There are then successively added 12.1 g (46 mmol) of methyl 6-bromo-2-naphthoate and 300 mg ofNiCl.sub.2 /DPPE complex.

The mixture is stirred for 10 hours at ambient temperature. 300 ml of water are added and the THF is evaporated. The remainder is extracted with methylene chloride. The organic phase is dried (MgSO.sub.4), filtered, evaporated and purified bypassage through a silica column (eluant: mixture of 50% dichloromethane and 50% hexane). After evaporation of the solvents, the resulting residue is recrystallized in hexane to give the expected ester: 11.5 g (72%). Melting point-160.degree. C.

EXAMPLE 27

6-(3-tert.butyl-4-methoxyphenyl)-2-naphthoic acid. Compound of Formula II wherein R'.sub.2 .dbd.tert.butyl, R'.sub.3 .dbd.OCH.sub.3 and R'.sub.6 .dbd.OH.

In a manner analogous to Example 15, starting with 7.0 g (20 mmol of the ester obtained in Example 26, 6.0 g (90%)of the expected acid are obtained. Melting point: 268.degree. C.

EXAMPLE 28

Methyl ester of 6[3-(1,1-dimethyldecyl)-4-methoxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.C(CH.sub.3).sub.2 C.sub.9 H.sub.19, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.--COOCH.sub.3

A solution of 16 g (45 mmol) of 2- (1,1-dimethyldecyl)-4-bromo anisole in 60 ml of THF is slowly added to 1.3 g (54 mmol) of magnesium and a crystal of iodine. The mixture is slightly heated at the beginning of the addition until the reaction offormation of the Grignard is initiated. Then the remainder of the solution containing the brominated derivative is added in a manner to maintain a regular reflux. Once the addition is complete, the mixture is stirred for 30 minutes at 50.degree. C.and then cooled to ambient temperature. 7.4 g (54 mmol) of zinc chloride in solution in 50 ml of THF are added. The mixture is stirred for 30 minutes at ambient temperature, 6.6 g (25 mmol) of methyl 6-bromo-2-naphthoate are added and then 175 mg ofNiCl.sub.2 /DPPE complex. The mixture is stirred for 3 hours at ambient temperature at which point 250 ml of water are added. The THF is eva-porated under reduced pressure and the residue is extracted with dichloromethane, dried and the solventevaporated. The residue is purified by passage through a silica column (eluant: mixture of 60% dichlorlmethane and 40% hexane). On evaporation, a solid is obtained which is recrystallized twice in hexane to give the methyl ester of6-[3-(1,1-dimethyldecyl)-4-methoxyphenyl]-2-naphthoic acid: 705 g (61%). Melting point: 92.degree. C.

EXAMPLE 29

6-[3-)1,1-dimethyldecyl)-4-methoxyphenyl]-2-naphthoic acid. Compound of Formula I wherein R.sub.4 .dbd.R.sub.5 .dbd.H, R.sub.2 .dbd.C(CH.sub.3).sub.2 C.sub.9 H.sub.19, R.sub.3 .dbd.OCH.sub.3 and R.sub.1 .dbd.COOH.

In a manner anologous to Example 15, starting with 3.6 g of the ester obtained in Example 28, 3 (87%) of 6-[3-(1,1-dimethyldecyl)-4-methoxyphenyl]-2-naphthoic acid are obtained. Melting point: 180.degree. C.

Examples of Compositions

Example A Fatty Cream wherein the active principle is in suspension

______________________________________ 6-[3-(1-adamantyl)-4-methoxy phenyl]- 0.001 g 2-naphthoic acid A combination of nonionic E/H emulsifiers 25.00 g and a fatty body of mineral origin sold by Goldschmidt under the trade name "ProteginX" Petrolatum oil 10.00 g Preservative, sufficient amount Water, sufficient amount for 100.00 g ______________________________________

In that example, the active compound can be replaced by the same amount of 6-[3-(1-adamantyl)-4-methoxy phenyl]-1-methyl 2-2naphthoic acid.

Example B

Skin cream--A fluid cream wherein the active principle is in suspension

______________________________________ Methyl ester of 6-(4-tert-butyl phenyl)-2- 0.02 g naphthoic acid Sorbitan stearate polyoxyethylenated 5.00 g with 20 moles of ethylene oxide sold by Atlas under the trade name "Tween 60" Sorbitanmonostearate sold by Atlas under 2.00 g the trade name "Span 60" Cetyl alcohol 5.00 g Triglycerides of capric and caprylic 10.00 g acids sold by Dynamit Nobel under the trade name "Miglyol 812" Preservatives, sufficient amount Water, sufficientamount for 100.00 g ______________________________________

Example C

Gel for the skin or scalp wherein the active principle is in suspension

______________________________________ Methyl ester of 6-(4-t-butyl phenyl)-2- 0.10 g naphthoic acid Ethanol 20.00 g Hydroxypropyl cellulose, sold by Hercules 2.00 g under the trade name "Klucel HF" Preservative, sufficient amount Water,sufficient amount for 100.00 g ______________________________________

Example D

Lotion for the skin

______________________________________ 6-[3-(1-adamantyl)-4-methoxyphenyl]-1- 0.3 g methyl-2-naphthoic acid Polyethylene glycol 400 70.0 g Ethanol 29.9 g ______________________________________

In that example, the active compound can be replaced by the same amount of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid.

Example E

Unguent for the skin

______________________________________ 6-[3-(1-adamantyl)-4-methoxyphenyl]-2- 0.001 g naphthoic acid Lanolin 50 g Vaseline, sufficient amount for 100 g ______________________________________

Example F

Oral composition--0.30 g gelule

______________________________________ 6-[3-(1-adamantyl)-4-methoxy phenyl]-2- 0.003 g naphthoic acid Cornstarch 0.060 g Lactose, sufficient amount for 0.300 g ______________________________________

The resulting powder is packaged in a gelule whose wall is made of gelatin, TiO.sub.2 and a preservative.

Example G

Capsule containing 0.400 g of the following suspension

______________________________________ Ethylamide of 6-[3-(1-adamantyl)-4-methoxy- 0.005 g phenyl]-2-naphthoic acid Glycerine 0.200 g Sucrose 0.050 g Polyethylene glycol 400 0.050 g Purified water, sufficient amount for 0.400 g ______________________________________

This suspension is packaged in a capsule made of gelatin, glycerine titanium dioxide and water.

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