Synthesis of benzo[4, 5]imidazo[2,1-a]isoquinolines via intramolecular C–H bond functionalization
作者:Lu Chen、Xian Zhang、Bin Chen、Bin Li、Yibiao Li
DOI:10.1007/s10593-017-2101-1
日期:2017.5
An improved procedure for the preparation of benzo[4, 5]imidazo[2,1-a]isoquinolines using PdCl2–PPh3 as catalyst was developed, featuring simple, sequential workup, good selectivity, and compatibility with a wide range of functional groups. Various (Z)-2-bromovinylimidazoles and 2-chlorophenylboronic acids containing either electron-withdrawing or electron-donating groups were shown to smoothly undergo
开发了一种以PdCl 2 -PPh 3为催化剂制备苯并[4,5]咪唑并[ 2,1- a ]异喹啉的改进方法,具有简单,连续的后处理,良好的选择性以及与多种功能兼容的特点。组。各种含(Z)-2-溴乙烯基咪唑和含有吸电子基团或给电子基团的2-氯苯基硼酸均能顺利地经历此反应序列,以生成各自的苯并[4,5]咪唑[2,1- a ]异喹啉的产率为62–77%。