Patent ID: 7875729

Claim:
A process, which comprises reducing a compound of formula (C) to preferentially form a trans isomer compound of formula (D) wherein Z represents an oxygen, sulfur, or methylene linkage group; X and Y independently represent hydrogen, an alkyl group, a hydroxy group, an alkoxy group, a halo group, a nitro group, an amino group, a substituted amino group, a cyano group, a sulfonyl group, a carboxyl group, a substituted carboxy group and combinations thereof, and wherein X and Y can each be present up to four times on their respective rings and each occurrence is independently selected; A represents a group of the formula O—R1; B represents hydrogen or a ═O group; and C represents an amino group, a methylamino group or a group of the formula O—R2; wherein R1 and R2 are each individually selected from hydrogen, alkyl, alkynyl and aralkyl groups.