Patent ID: 6642418
Filing Date: 2003-11-04
Classification: C07C

Abstract:
A process for the preparation of a compound of formula (I): wherein:one of the groups R1 and R2 is cyclopropyl and the other is phenyl substituted by two or three groups, which may be the same or different selected from halogen, nitro, cyano, â€”(CR4R5)S(O)pR6, â€”S(O)pR6, C1-6alkoxy, C1-4haloalkoxy, C1-4alkyl, C1-4haloalkyl, 1,2,4-triazol-1-yl and â€”SF5; wherein: p is zero, one or two; R4 and R5 are independently hydrogen or C1-4alkyl; and R6 is C1-4alkyl; which process comprises the hydrolysis and decarboxylation of a compound of formula (II): wherein R1 and R2 are as hereinbefore defined, and R3 is C1-4alkyl, in the presence of water.