Patent ID: 6867314

Claim:
A process for preparing a compound of formula III comprising: (1) acylating a compound of formula I to provide a corresponding compound of formula II wherein R 1 and R 2 are each independently (C 1 -C 10 )alkyl, (C 2 -C 10 )alkenyl, (C 2 -C 10 )alkynyl, or (C 6 -C 10 ) aryl, wherein any alkyl, alkenyl, alkynyl, or aryl of R 1 and R 2 can be optionally substituted with one or more halo, nitro, cyano, trifluoromethyl, hydroxy, SR or NRR, wherein each R is independently H or (C 1 -C 10 )alkyl; and (2) alcoholyzing a compound of formula II to provide a corresponding compound of formula III.