Synthesis of tetrahydroisoquinolines through TiCl4-mediated cyclization and Et3SiH reduction
作者:Zeyu Shi、Qiong Xiao、Dali Yin
DOI:10.1016/j.cclet.2019.09.023
日期:2020.3
Abstract A versatile and efficient telescoped reaction sequence for the synthesis of tetrahydroisoquinolines (THIQs) is reported that uses TiCl4 to promote cyclization of a benzylaminoacetal derivative and Et3SiH for reduction of the intermediate 4-hydroxy-THIQ. This method is complimentary to the classical Pomeranz-Fritsch and related reactions since it tolerates electron-withdrawing substituents
摘要报道了一种通用且有效的伸缩反应序列,用于合成四氢异喹啉(THIQs),该序列使用TiCl4促进苄氨基缩醛衍生物的环化反应,并使用Et3SiH还原中间体4-羟基-THIQ。此方法是对经典Pomeranz-Fritsch和相关反应的补充,因为它可以耐受吸电子取代基并允许使用8位取代的THIQ。