| Patent Number |
Title Of Patent |
Date Issued |
| RE38683 |
Preparation of titanocenes |
January 4, 2005 |
| A method for producing dialkylsilyl.Iadd.bis.Iaddend.(2-alkyl-4-aryl indenyl) titanocenes including rac-Me.sub.2 Si.Iadd.bis.Iaddend.(2-methyl-4-phenylindenyl)-titanium dichloride is described. |
| RE38325 |
Method for the production of tetrakis (pentafluorophenyl) borates |
November 18, 2003 |
| A process for preparing tetrakis (pentafluorophenyl) borate is described that involves reaction of a pentafluorophenyl magnesium halide with an alkali metal tetrafluoroborate. |
| RE36115 |
Process for producing amine-boranes |
February 23, 1999 |
| A method for producing amine-boranes, specifically pyridine-borane which is highly stable and of good color is described. |
| 7205427 |
Cross-coupling synthesis of alkyl (dialkylphenyl) indenes |
April 17, 2007 |
| A cross-coupling synthesis of 2-alkyl-4-(2,6-dialkylphenyl)indenes is described. A 2-alkylidene is treated with a dialkylboronic acid in the presence of a catalyst. A feature of the invention is the use of a cross-coupling catalyst comprising palladium dichloride (1,5-cyclooctadiene) |
| 6861531 |
Synthesis of 2,6-dicarbonylpyridines |
March 1, 2005 |
| Synthesis of 2,6-dicarbonylpyridines in solution in a hydrocarbon medium is described. The solutions of 2,6-dicarbonylpyridines may be used directly in further syntheses. |
| 6642402 |
Synthesis of bis (cyclopentadienyl) and bis (indenyl) ruthenium complexes |
November 4, 2003 |
| A process for preparing a cyclopentadienyl or indenyl ruthenium complex by treatment of a cyclopentadienyl or indenyl compound with ruthenium trichloride dihydrate and magnesium powder in an alkanol at 10.degree. C. to -30.degree. C. is described. |
| 6590114 |
Conversion of cyclopentadienyl silyl amines to organometallic complexes comprising titanium bisa |
July 8, 2003 |
| Conversion of cyclopentadienyl or indenyl compounds to titanium organometallic complexes by treatment with titanium tetraalkoxides is described. |
| 6586625 |
Synthesis of 2-halobenzyl alkanoic acid |
July 1, 2003 |
| A method for synthesizing compounds of Formula I ##STR1##in which R is alkyl or aryl and X is any halogen is described. |
| 6531619 |
Preparation of cyclopentadienyl or indenyl titanium trihalides |
March 11, 2003 |
| Cyclopentadienyl or indenyl titanium trichlorides are produced by converting a cyclopentadiene or an indene to a corresponding cyclopentadienyl or indenyl titanium trialkoxide which is treated with a halogenating agent to provide the desired cyclopentadienyl or indenyl titanium trich |
| 6489526 |
Method for synthesis of hydrocarbyl bridged indenes |
December 3, 2002 |
| A method for treating a terminal dihalo hydrocarbyl compound with an alkali metal indenide to produce a bis(indenyl) hydrocarbyl compound is described. |
| 6465700 |
Coupling reactions of 2-substituted, 7-haloindenes with aryl substituents to produce metallocene |
October 15, 2002 |
| Novel 2-substituted 7-haloindenes and methods for synthesizing such indenes are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate. |
| 6465667 |
Synthesis and isomerization of 1,2-bis (indenyl) ethanes |
October 15, 2002 |
| A method for producing 1,2-bis(indenyl)ethanes in good yield is described. An agent and its application for isomerizing kinetic EBI to thermodynamic EBI and for isomerizing meso TMS-EBI to rac TMS-EBI are exemplified. |
| 6455719 |
Constrained geometry ligands and complexes derived therefrom |
September 24, 2002 |
| A novel constrained geometry titanium(II) diene complex and ligands of such complexes are described. The novel complex has an olefin polymerization activity substantially in excess of a defined activity standard characteristic of analogous prior art constrained geometry diene complex |
| 6452031 |
Preparation of titanium organometallic complexes comprising a titanium bisalkoxide or dihalide m |
September 17, 2002 |
| Conversion of a ligand of titanium organometallic complex to a titanium bisalkoxy or a titanium dichloride is described. |
| 6441258 |
Synthesis and isomerization of 1,2-bis (indenyl) ethanes |
August 27, 2002 |
| A method for producing 1,2-bis(indenyl)ethanes in good yield is described. An agent and its application for isomerizing kinetic EBI to thermodynamic EBI and for isomerizing meso TMS-EBI to rac TMS-EBI are exemplified. |
| 6388151 |
Synthesis of Tetraalkylcyclopentadienes |
May 14, 2002 |
| A method for synthesizing tetramethylcyclopentadiene from 2,3-dibromobutane is described. A 2-bromo-2-butene Grignard is reacted with an ethyl formate to produce a 3,5-dimethyl-2,5-heptadiene-4-ol magnesium bromide which is then quenched with acetic acid to produce 3,5-dimethyl-2,5-hepad |
| 6307063 |
Conversion of compounds of titanium in a plus 4 oxidation state to titanium compounds in a plus |
October 23, 2001 |
| The reduction of a titanium tetrahalide with titanium in the presence of an ether which forms an adduct with titanium trihalide, wherein an adduct insoluble in said ether is produced. |
| 6291699 |
2-alkyl-4-(2,6-dialkylphenyl) indenes |
September 18, 2001 |
| 2-alkyl-4-(2,6-dialkylphenyl) indenes, methods for the synthesis thereof, methods for converting such indenes to bridged metallocene ligands, methods for converting such ligands to bridged metallocenes and olefin polymerization processes in which such metallocenes are used as a catalyst |
| 6231790 |
Tetrakis-pentafluorophenyl borates from pentafluorophenyl grignard reagents |
May 15, 2001 |
| Pentafluorophenyl Grignard reagents are reacted with a boron trihalide in a non-ethereal solvent such as toluene to produce a tetrakis pentafluorophenyl borate magnesium halide. |
| 6225506 |
Synthesis of alkene-2-ones |
May 1, 2001 |
| A method for synthesizing an alkyl-2-one by reacting a 2-alkene halide with a 2,4-alkanedione in an alkylene glycol medium having a boiling point higher than said alkene-2-one is described. |
| 6218557 |
Synthesis of titanocenes |
April 17, 2001 |
| A method for the preparation of titanium-containing metallocene compounds, including constrained geometry titanium complexes, useful as olefin polymerization catalysts is disclosed. Pursuant to the invention, titanium tetrachloride is converted to titanium trichloride by reaction with a |
| 6180810 |
Silyl amines |
January 30, 2001 |
| Silyl amine compounds which have a proton available for covalent bonding to a metallocene metal center are disclosed. |
| 6175027 |
Synthesis of bis (alkyl cyclopentadienyl) metallocenes |
January 16, 2001 |
| A method for producing an alkyl cyclopentadiene by reacting cyclopentadienyl Grignard with an alkyl halide and for converting the alkyl cyclopentadiene to a bis(n-alkyl cyclopentadienyl) Group IV metal dihalide is described. |
| 6166267 |
Synthesis of n-silylated cyclopentaphenanthrene compounds |
December 26, 2000 |
| A method of converting Compound A (1,3-dehydro-cyclopenta[1]phenanthren-2-one) to Compound C (1H-cyclopenta[1]penanthren) in situ in a single reactor is disclosed. |
| 6124489 |
Preparation of bis aryl cyclopentadienyl Group IVA metal dihalides |
September 26, 2000 |
| Production of aryl cyclopentadienyl Group IVA metal dihalides by dehydrogenation of a substituted or unsubstituted bis-(cyclohexenylcyclopentadienyl) Group IVA metal dihalide is described. |
| 6096928 |
Method for the production of tetrakis (pentafluorophenyl) borates |
August 1, 2000 |
| A process for preparing tetrakis (pentafluorophenyl) borate is described that involves reaction of a pentafluorophenyl magnesium halide with an alkali metal tetrafluoroborate. |
| 6087518 |
Silylated and N-silylated compound synthesis |
July 11, 2000 |
| Novel silanes having the formula (RSO.sub.3).sub.2 --Si--Q.sub.2.0.5HX are described. Synthesis of silylated bis-cyclopentadienyl and N-silylated mono(cyclopentadienyl) ligands and similar indenyl ligands utilizing the novel silanes is described. |
| 6075171 |
2-substituted 7-haloindenes and methods for synthesizing |
June 13, 2000 |
| Novel 2-substituted 7-haloindenes and methods for synthesizing such indents are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate. |
| 6015916 |
Constrained geometry metallocene catalyst complexes |
January 18, 2000 |
| A practical and scalable process for the synthesis of constrained geometry metallocene catalyst is described. |
| 5965757 |
Synthesis of N-silylated cyclopentaphenanthrene compounds |
October 12, 1999 |
| A method for the synthesis of certain N-silylated cyclopentaphenanthrene (Group IV metal) complexes is disclosed. |
| 5877366 |
Dicyclopentadiene cracking process |
March 2, 1999 |
| A process and a system for cracking dicyclopentadiene are disclosed pursuant to the process preheated dicyclopentadiene is introduced into a heated transfer fluid sufficiently below the transfer fluid surface to accomplish substantially complete conversion of said dicyclopentadiene to |
| 5847176 |
Preparation of chiral titanocenes |
December 8, 1998 |
| A method for producing dialkylsilyl (2-alkyl-4-aryl indenyl) titanocenes including rac-Me.sub.2 Si(2-methyl-4-phenylindenyl)-titanium dichloride is described. |
| 5789634 |
Coupling reactions of 2-substituted, 7-haloindenes with aryl substituents to produce metallocene |
August 4, 1998 |
| Novel 2-substituted 7-haloindenes and methods for synthesizing such indenes are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate. |
| 5744656 |
Conversion of hexafluorobenzene to bromopentafluorobenzene |
April 28, 1998 |
| A method for producing tetrakis (pentafluorophenyl) borates is described. Hexafluorobenzene is converted to bromopentafluorobenzene which may be isolated and then reacted with an alkyl lithium to produce pentafluorophenyl lithium which in turn is reacted directly with an appropriate |
| 5681976 |
Preparation of bis(acetonitrile) palladium dichloride |
October 28, 1997 |
| A method for the production of tetrachloropalladic acid and bis(acetonitrile) palladium dichloride is described. Palladium metal is reacted with concentrated hydrochloric acid and chlorine to produce the acid which is converted to bis(acetonitrile) palladium dichloride by reaction wi |
| 5679289 |
Method for the synthesis and use of pentafluorophenyl lithium to produce tetrakis pentafluorophe |
October 21, 1997 |
| Procedures are disclosed which preclude significant safety hazards in the production of bulk quantities pentafluorophenyl lithium. A pentafluorophenyl compound is reacted with an alkyl lithium compound in a reaction zone, preferably temperature controlled, under conditions such that |
| 5516909 |
Process for producing amine-boranes |
May 14, 1996 |
| A method for producing amine-boranes, specifically pyridine-borane which is highly stable and of good color is described. |
| 5292929 |
Asymmetric synthesis of chiral secondary alcohols |
March 8, 1994 |
| A process for producing (R)-2-hydroxy-6-haloalkane is disclosed. In the first step, a cyclic alkanol is photohalogenated. In the second step, the photohalogenation product is reacted with a chiral catalyst and dialkyl zinc to produce (R)-2-hydroxy-6-haloalkane. |
| 5069821 |
Stable sodium tetraphenylborate solutions |
December 3, 1991 |
| Stable alkaline aqueous solutions of sodium tetraphenylborate. |
| 5035365 |
Thortveitite ore beneficiation process |
July 30, 1991 |
| A thorteveitite ore beneficiation process which comprises comminuting the ore by wet autogenuous grinding to substantially liberate the thortveitite contained therein, and passing the comminuted ore through a nonuniform magnetic field to produce a concentrate and a tailing, the concentra |
