2-HALOGEN-4,5-DIFLUOROBENZOIC ACID COMPOUNDS AND PROCEDURES FOR PREPARING THEREOF, AND PROCEDURES FOR THE PREPARATION OF 1-CYCLOPROPYL-6,7-DIFLUOR-1,4-DIHYDRO-4-OXO-OXO-OXO-OXO-OXO-OXO-OXO

摘要

Compounds of the formula: CHEM wherein Y is OR1, fluoro, chloro, methyl, CHEM R1, and R3 are independently selected from hydrogen and C1-C4 alkyl, R2 is C1-C4 alkyl and X is fluoro, chloro or bromo, with the proviso that when Y is OH, X cannot be bromo and with the proviso that X can be fluoro only if R2 is methyl.