GILLIGAN, PAUL J.;MCGUIRK, PAUL R.;WITTY, MICHAEL J.
作者:GILLIGAN, PAUL J.、MCGUIRK, PAUL R.、WITTY, MICHAEL J.
DOI:——
日期:——
Process for the preparation of 3-(2'-fluorophenyl)pyridine
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.