ONE-POT SYNTHESIS OF ALKYL 3-CYCLOPROPYLAMINO-2- 2,4-DIBROMO-3-(DIFLUOROMETHOXY)BENZOYL -2-PROPENOATE AS A USEFUL INTERMEDIATE FOR ANTIBACTERIAL QUINOLONE MEDICAMENTS

摘要

The present invention relates to a new and industrially advantageous one-pot process for the preparation of alkyl 3-cyclopropyl amino-2-[2,4-dibromo-3-(difluoromethoxy) benzoyl]-2-propenoates in which R represents methyl or ethyl, which are valuable intermediates for the production of highly active antibacterial quinolone medicaments.