A Convenient Method for the Preparation of 4-Hydroxy-2-methyl-1-oxo-1,2-dihydroisoquinoline-3-carboxylic Acid Derivatives
作者:Isabel Perillo、María Blanco、María Shmidt、Celia Schapira
DOI:10.1055/s-2006-942402
日期:2006.6
An improved method for the synthesis of 4-hydroxy-2-methyl-l-oxo-1,2-dihydroisoquinoline-3-carboxylic acid derivatives is described. The synthetic route involves initial phthalic anhydride aminolysis with alkylaminoacetic acid derivatives, further esterification with diazomethane and final heterocyclization of the phthalamic ester intermediates by alkoxide-induced Dieckmann condensation. The best yields
描述了一种用于合成 4-羟基-2-甲基-1-氧代-1,2-二氢异喹啉-3-羧酸衍生物的改进方法。合成路线包括用烷基氨基乙酸衍生物开始邻苯二甲酸酐氨解,用重氮甲烷进一步酯化,最后通过醇盐诱导的 Dieckmann 缩合对邻苯二甲酸酯中间体进行杂环化。酯类和 N,N-二取代甲酰胺的产率最高。