A Convenient Synthesis of 4-Hydroxy-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxamide
Derivatives
作者:Kazuhiro Kobayashi、Daisuke Iitsuka、Shuhei Fukamachi、Hisatoshi Konishi
DOI:10.1055/s-0028-1083307
日期:——
A simple method for synthesizing 1-aryl-4-hydroxy-N,N-dimethyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxamides has been developed. Thus, 3-(2-chloropyridin-3-yl)-N,N-dimethyl-3-oxopropanamide, easily prepared by treating ethyl 2-chloropyridine-3-carboxylate with lithium enolate of N,N-dimethylacetamide, smoothly reacts with a range of aryl isocyanates in the presence of two molar amounts of sodium hydride to provide the desired products in moderate yields.
现已开发出一种合成 1-芳基-4-羟基-N,N-二甲基-2-氧代-1,2-二氢-1,8-萘啶-3-甲酰胺的简单方法。因此,3-(2-氯吡啶-3-基)-N,N-二甲基-3-氧代丙酰胺很容易通过处理 2-氯吡啶-3-甲酸乙酯与 N,N-二甲基乙酰胺的锂烯醇盐来制备,在两个摩尔量的氢化钠存在下与一系列芳基异氰酸酯顺利反应,以中等产率提供所需的产品。