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 of in which R represents methyl or ethyl, which are valuable intermediates for the production of highly active antibacterial quinolone medicaments.
本发明涉及一种新的、工业上有利的一锅法制备烷基3-环丙
氨基-2-[2,4-二
溴-3-(二
氟甲氧基)苯甲酰]-2-
丙烯酸酯的方法,其中R代表甲基或乙基,这些化合物是生产高活性抗菌
喹诺酮药物的有价值的中间体。