Palladium-Catalyzed Regioselective Aerobic Oxidative CH/NH Carbonylation of Heteroarenes under Base-Free Conditions
作者:Hua Zhang、Dong Liu、Caiyou Chen、Chao Liu、Aiwen Lei
DOI:10.1002/chem.201101300
日期:2011.8.22
balloon pressure of CO, the direct oxidative carbonylation of various heteroarenes with different alcohols was achieved in good to high yields with air as the oxidant in the presence of PdCl2(PPh3)2 (see scheme). Notably, this transformation was carried out under base‐free conditions. The reaction showed remarkably high regioselectivity and presents an environmentally benign protocol for the synthesis
清除空气!通过使用CO的球囊压力,在存在PdCl 2(PPh 3)2的情况下,以空气作为氧化剂,可以以高至高产率实现各种杂芳烃与不同醇的直接氧化羰基化反应(参见方案)。值得注意的是,这种转化是在无碱条件下进行的。该反应显示出极高的区域选择性,并为羧酸衍生物的合成提供了环境友好的方案。