Simple Synthesis of 4‐Substituted 1(2<i>H</i>)‐Isoquinolinones via Electrophilic Trapping of Lithiated Mono‐ and Dianion Precursors
作者:Anthony D. Sercel、Joseph P. Sanchez、H. D. Hollis Showalter
DOI:10.1080/00397910701575343
日期:2007.12
developed to access 4‐substituted 1(2H)‐isoquinolinones from readily available precursors. This is achieved via electrophilic trapping of di‐ and monolithium anions derived from alkyllithium exchange of 4‐bromo‐1(2H)‐isoquinolinones and corresponding 4‐bromo‐1‐methoxyisoquinolines, respectively. Products derived from the latter are then hydrolyzed to the target 4‐substituted 1(2H)‐isoquinolinones. The methodology
摘要 已经开发出合成路线以从现成的前体中获得 4-取代的 1(2H)-异喹啉酮。这是通过分别从 4-溴-1(2H)-异喹啉酮和相应的 4-溴-1-甲氧基异喹啉的烷基锂交换衍生的二-和单锂阴离子的亲电子捕获来实现的。然后将后者衍生的产物水解为目标 4-取代的 1(2H)-异喹啉酮。该方法具有潜在的应用,可用于获取任一环中具有额外取代基的 4-取代 1(2H)-异喹啉酮。