申请人:Pfizer Inc.
公开号:US04797490A1
公开(公告)日:1989-01-10
6-Fluoro-7-pyridylquinolone carboxylic esters and acids having antibacterial activity are prepared by coupling of a 2-fluorophenyl-metallic compound with a pyridyl bromide or iodide in the presence of a transition metal catalyst, nitrating and hydrogenating the pyridyl-2-fluorophenyl compound formed, introducing a substituent on the nitrogen of the amine formed, and cyclizing after reacting with a dialkyl or dibenzyl ethoxymethylene malonate to form a 6-fluoro-7-pyridyl-1,4-dihydroquinol-4-one 3-carboxylate, and hydrolyzing to the corresponding acid.
通过在转移金属催化剂存在下将2-氟苯基金属化合物与吡啶溴化物或碘化物偶联,硝化和氢化所形成的吡啶-2-氟苯基化合物,引入胺基氮上的取代基,与二烷基或二苄乙氧亚甲基丙二酸酯反应后环化形成6-氟-7-吡啶基-1,4-二氢喹啉-4-酮-3-羧酸酯,并水解成相应的酸,制备具有抗菌活性的6-氟-7-吡啶基喹诺酮羧酯和酸。