Patent ID: 7390931

Claim:
A method of making compounds of Formula 9, or Formula 10, or opposite enantiomers thereof, wherein R is C 1-6 alkyl, halo-C 1-6 alkyl, C 3-8 cycloalkyl, halo-C 3-8 cycloalkyl, alkanoyl, C 1-6 alkoxy, C 1-6 alkoxy-C 1-6 alkyl, C 1-6 alkoxycarbonyl, aryl, aryl-C 1-6 alkyl, aryloxy, aryl-C 1-6 alkoxy, aryloxycarbonyl, aryl-C 1-6 alkoxycarbonyl, or carboxy, and each of the aryl and the C 3-8 cycloalkyl moieties are independently substituted or unsubstituted, and X is C 1-12 alkyl, C 1-12 alkanediyl, or phen-1,2-diyl, in which phen-1,2-diyl is substituted or unsubstituted, the method comprising epimerizing compounds of Formula 7, or Formula 8, or opposite enantiomers thereof, said epimerizing compounds of compounds of formula 7 or formula 8 at a temperature greater than or about equal to 100° C. and less than or about equal to the decomposition temperature of the compounds of Formula 7 or Formula 8, to give the compounds of Formula 9, or Formula 10, or the opposite enantiomers thereof, respectively, wherein R and X in Formula 7 and Formula 8 are as defined in Formula 9 and Formula 10.