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Inventor:
Decorzant; Rene
Address:
Onex, CH
No. of patents:
12
Patents:












Patent Number Title Of Patent Date Issued
7345206 Process for the dimerisation of alkyl glyoxals March 18, 2008
The present invention relates to the field of organic synthesis and more particularly to a new process for the dimerisation of alkyl glyoxals, said process being promoted by an alkaline salt of the hydroxymethanesulfinic acid and is performed at a pH comprised between 3.5 and 9.5.
7321067 Process for the preparation of 1,4-dialkyl-2,3-diol-1,4-butanedione January 22, 2008
The present invention relates to a process for the preparation of compounds of a 1,4-dialkyl-2,3-diol-1,4-butanedione by a catalytic aldol condensation between an alkyl glyoxal and an .alpha.-hydroxy ketone.
7022665 Acetals of 2,4,7-decatrienal as perfuming or flavoring ingredients April 4, 2006
The present invention relates to an acetal of formula ##STR00001## in which the symbols R.sup.1 represent, independently or simultaneously, a linear or branched saturated or unsaturated C.sub.1 to C.sub.4 hydrocarbon group; or the two R.sup.1 are bonded together to form a saturated
5760277 Process for the manufacture of unsaturated cycloaliphatic ketones June 2, 1998
The cycloaliphatic ketones of formula ##STR1## having two conjugated double bonds in positions 1 and 3, or 2 and 4, such as indicated by the dotted lines, and wherein R defines a C.sub.1 to C.sub.3 alkyl radical, usefuil intermediate products for the preparation of jasmonic deriv
5538943 Use of 1,3-undecadien-5-yne as a perfuming ingredient July 23, 1996
1,3-Undecadien-5-yne and its (E) and (Z) configuration isomers are useful perfuming ingredients for the preparation of perfuming bases and a variety of perfumed consumer products, to which they impart odor characters of the galbanum, floral, fruity-citrus type.
5268356 Cyclic tertiary alcohols and their use as perfuming ingredients December 7, 1993
The cyclic tertiary alcohols of formula ##STR1## wherein the dotted line indicates the location of a single or double bond, symbols R.sup.1 and R.sup.3 represent each a hydrogen atom or a methyl radical and symbol R.sup.2 stands for a lower alkyl radical, are useful perfuming ing
4814469 Novel hydroperoxide and use of same as intermediate for the preparation of 3a,6,69a-tetramethylp March 21, 1989
Novel hydroperoxide of formula ##STR1## and use of same as intermediate for the preparation of 3a,6,6,9a-tetramethylperhydronaphtho[2,1-b]furan, also known as AMBROX (registered tradename of FIRMENICH SA, Geneva/Switzerland).Process for its preparation via an oxidation of sclareol by
4734530 Novel hydroperoxide and use of same as intermediate for the preparation of 3a,6,6,9a-tetramethyl March 29, 1988
Novel hydroperoxide of formula ##STR1## and use of same as intermediate for the preparation of 3a,6,6,9a-tetramethylperhydronaphtho[2,1-b]furan, also known as AMBROX (registered tradename of FIRMENICH SA, Geneva/Switzerland).Process for its preparation via an oxidation of sclareol by
4371460 Bicyclic compounds and utilization thereof as perfuming agents February 1, 1983
Kentones of the formula ##STR1## wherein each of the symbols R.sup.1, R.sup.2, and R.sup.3 identical or different, represent a hydrogen atom or a lower alkyl radical containing 1 to 3 carbon atoms are disclosed useful as perfuming agents and in the preparation of perfume products
4266075 Bicyclic aldehyde derivatives, their use as perfuming and flavoring ingredients and process for May 5, 1981
Bicyclic aldehyde derivatives of formula ##STR1## containing a single or a double bond in the position indicated by the dotted lines and wherein symbol R.sup.1 represents a hydrogen atom or a methyl radical and R.sup.2 defines a linear or branched alkyl radical containing 1 to 6
4218347 Bicyclic aldehyde perfuming and flavoring ingredients August 19, 1980
Bicyclic aldehyde derivatives of formula ##STR1## containing a single or a double bond in the position indicated by the dotted lines and wherein symbol R.sup.1 represents a hydrogen atom or a methyl radical and R.sup.2 defines a linear or branched alkyl radical containing 1 to 6
4176139 Process for preparing unsaturated spiranic derivatives November 27, 1979
Process for preparing unsaturated spiranic derivatives of formula ##STR1## wherein index n represents integer 1 or 2 and wherein symbol R defines a lower alkyl radical, starting from the corresponding cycloalkanone via an addition thereto of a dihalo-alkene of formula ##STR2##










 
 
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