Method for the preparation of unsaturated hydroxy fatty acids and their esters, their use in pharmaceutical and/or cosmetic preparations
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United States of America Patent
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app pub date -
Mar 12, 2004
filing date -
Sep 12, 2001
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Abstract
A method of preparing unsaturated hydroxy fatty acids and esters thereof corresponding to general formula (Id): 1 wherein n=1 to 4, m=2 to 16, R.sub.1.dbd.OH, Cl, Br, OR.sub.3 in which R.sub.3 is a straight or branched alkyl, alkenyl or alkynyl radical of 1 to 16 carbons or glycerol esters, optionally substituted by one or more atoms selected from the group consisting of carbon, nitrogen, sulfur and halogens, R.sub.2.dbd.H, SiR'.sub.1R'.sub.2R'.sub.3 in which R'.sub.1, R'.sub.2 and R'.sub.3 can be identical or different from each other and are a straight or branched alkyl, alkenyl or alkynyl radical of 1 to 16 carbons or glycerol esters, optionally substituted by one or more atoms selected from the group consisting of carbon, nitrogen, sulfur and halogens, or R.sub.2.dbd.C--Ar.sub.3 with Ar representing an aryl radical optionally substituted by one or more atoms selected from the group consisting of carbon, nitrogen, sulfur and halogens, or R.sub.2=the tetrahydropyranyl of formula: 2 is disclosed.
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