Patent ID: 6160182
Filing Date: 2000-12-12
Classification: C07C

Abstract:
A process for obtaining isomeric compounds represented by formulas 1 and 2, comprising contacting a compound represented by formula 3 with an acid catalyst and an alcohol ROH, wherein:a. formulas 1, 2, and 3 are as shown below: ##STR17## b. one of the wavy lines in each of formulas 1 and 2 represents a double bond, and the two other wavy lines represent a single bond;c. R is a linear or cyclic alkyl group, or hydroxyalkyl group, or alkoxyalkyl group, or aryl group, and is substituted or unsubstituted, saturated or unsaturated;d. R.sup.1 and R.sup.2 are independently hydrogen or lower alkyl;e. R.sup.3 is lower alkyl; andf. the configuration at carbon b and c in formula 1, and a and b in formula 2, is independently R or S.