benzothiophenes is challenging, and few direct functionalization methods are available. A gold-catalyzed reaction of alkynes with benzothiophene S-oxides provides regioselective entry into C3-alkylated benzothiophenes with the C7-alkylated isomer as the minor product. This oxyarylation reaction works with alkyl and aryl alkynes and substituted and unsubstituted benzothiophenes. Mechanistic studies identify that
在
苯并噻吩上形成C3选择性C–C键具有挑战性,几乎没有直接的官能化方法。
炔烃与
苯并噻吩S-氧化物的
金催化反应提供了区域选择性地进入C3-烷基化的
苯并噻吩,其中次要产物为C7-烷基化的异构体。该氧化芳基化反应与烷基和芳基
炔烃以及取代的和未取代的
苯并噻吩一起起作用。机理研究表明,亚砜会抑制催化剂[D
TBPAu(PhCN)] SbF 6,后者还会降解并形成未反应的络合物[(
DTBP)2 Au] SbF 6。