Pyridonecarboxylic acids as antibacterial gaents. VIII. An alternative synthesis of enoxacin via fluoronicotinic acid derivatives.
作者:TERUYUKI MIYAMOTO、HIROSHI EGAWA、JUN-ICHI MATSUMOTO
DOI:10.1248/cpb.35.2280
日期:——
An alternative synthesis of enoxacin, a 1, 8-naphthyridine antibacterial agent, was developed. The present method involves 1, 8-naphthyridine ring construction by the Dieckmann type cyclization of ethyl 5-fluoronicotinate having a 2-ethoxycarbonylethylamino moiety at C-2. This nicotinate was prepared in 7 steps from ethyl fluoroacetate via ethyl 2, 6-dichloro-5-fluoronicotinate.
一种1,8-萘啶类抗菌剂依诺沙星的替代合成物被开发出来。目前的方法是通过在C-2处具有2-乙氧基羰基乙基氨基部分的5-氟烟酸乙酯的Dieckmann型环化反应来构建1,8-萘啶环。这种烟酸酯是通过7个步骤从氟乙酸乙酯通过2,6-二氯-5-氟烟酸乙酯制备的。