Polyfunctional 4-quinolinones. Synthesis of 2-substituted 3-hydroxy-4-oxo-1,4-dihydroquinolines
作者:María S. Shmidt、Isabel A. Perillo、Alicia Camelli、María A. Fernández、María M. Blanco
DOI:10.1016/j.tetlet.2016.01.077
日期:2016.3
We present here two new methods based on rearrangement reactions to obtain novel 2-substituted 3-hydroxy-4-oxo-1,4-dihydroquinolines, an important family of heterocycles with potential applications. Alkyl 3-hydroxy-4-oxo-1,4-dihydroquinoline-2-carboxylates were obtained by alkoxide promoted rearrangement of alkyl isatinacetates. A second synthetic route involves the alkoxide promoted reaction of both
我们在此介绍两种基于重排反应的新方法,以获得新颖的2-取代的3-羟基-4-氧代-1,4-二氢喹啉,具有重要应用前景的重要的杂环族。通过醇盐促进烷基异氰酸酯乙酸酯的重排获得3-羟基-4-氧代-1,4-二氢喹啉-2-羧酸烷基酯。第二种合成途径涉及伊斯丁和N-甲基伊斯丁两者的醇盐促进的反应,以及具有酸性亚甲基的烷基化剂。该反应导致通过Darzens的缩合形成螺氧基环氧吲哚。当使用苯甲酰溴时,将最初获得的苯甲酰基取代的螺氧基环氧吲哚以良好或优异的收率平稳地转化为相应的2-苯甲酰基-3-羟基-4-喹啉酮。