Palladium-Catalyzed Domino C–S Coupling/Carbonylation Reactions: An Efficient Synthesis of 2-Carbonylbenzo[<i>b</i>]thiophene Derivatives
作者:Fanlong Zeng、Howard Alper
DOI:10.1021/ol200880m
日期:2011.6.3
A facile and selective palladium-catalyzeddomino procedure has been developed for the preparation of 2-carbonylbenzo[b]thiophene derivatives from 2-gem-dihalovinylthiophenols. This protocol involves intramolecular C–S coupling/intermolecular carbonylation cascade sequences and allows access to various highly functionalized benzo[b]thiophenes in moderate yields.
一种简便的和选择性的钯催化的多米诺程序已被开发用于2- carbonylbenzo [制备b ]从2-噻吩衍生物宝石-dihalovinylthiophenols。该方案涉及分子内C–S偶联/分子间羰基化级联序列,并允许以中等收率获得各种高度官能化的苯并[ b ]噻吩。
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