Synthesis of 4-Hydroxy-3-quinolinecarboxylic Acid Derivatives by a Condensation/Cyclization Sequence between<i>o</i>-Isocyanobenzoates and Magnesium Enolates
作者:Kazuhiro Kobayashi、Toshio Nakashima、Masaaki Mano、Osamu Morikawa、Hisatoshi Konishi
DOI:10.1246/cl.2001.602
日期:2001.7
Addition of magnesium ester and amide enolates, generated using an excess amount of a magnesium amide (from diisopropylamine and ethylmagnesium bromide), to o-isocyanobenzoates affords 4-hydroxy-3-quinolinecarboxylic esters and amides by a tandem Claisen-type condensation/cyclization sequence.
使用过量的氨基镁(来自二异丙胺和乙基溴化镁)将镁酯和酰胺烯醇化物添加到邻异氰基苯甲酸酯中,通过串联克莱森型缩合/环化序列提供 4-羟基-3-喹啉羧酸酯和酰胺.