Method for the isomerization of a 3-(Z)-unsaturated carboxylic acid to the 3-(E)-isomer

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United States of America

PATENT NO 12172956
APP PUB NO 20210009495A1
SERIAL NO

16969680

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Abstract

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The present invention relates to a method for isomerizing a 3-(Z)-unsaturated carboxylic acid of the formula 1-Z or a salt thereof, wherein R2 is C1-C24-alkyl, C2-C24-alkenyl having 1, 2, 3 or more than 3 C—C double bonds, unsubstituted or substituted C5-C12-cycloalkyl, or unsubstituted or substituted aryl; R1 is hydrogen or has one of the definitions specified for R2; with the proviso that R2 has a higher priority than R1 in accordance with IUPAC; to give a 3-(E)-unsaturated carboxylic acid of the formula I-E or a salt thereof, wherein the isomerization of the compound of the formula 1-Z is effected in the presence of an anhydride of an organic acid and a base or in the presence of a ketene of formula CR11R12C(0), wherein R11 and R12 are as defined in the claims and in the specification and a base. In particular, the present invention relates to a method for preparing compositions with increased content of (3E,7E)-homofarnesylic acid starting from compositions comprising (3Z,7E)- and (3E,7E)-homofarnesylic acid.

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Patent Owner(s)

Patent OwnerAddress
BASF SECARL-BOSCH-STRASSE 38 67056 LUDWIGSHAFEN AM RHEIN RHEIN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Keller, Andreas Ludwigshafen am Rhein, DE 145 901
Paciello, Rocco Ludwigshafen am Rhein, DE 103 659
Schelwies, Mathias Ludwigshafen am Rhein, DE 28 82
Siegel, Wolfgang Ludwigshafen am Rhein, DE 150 1245

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