This paper introduced an economic and environmental approach to 3-bromoindenes from simple and readily available o-(alkynyl)styrenes via a Pd-catalyzed cascade cyclization including bromopalladation/Heck cross-coupling/β-H elimination. With O2 as the sole oxidant and KBr as bromide source, a series of poly-substituted 3-bromoindenes were synthesized with high chemoselectivity avoiding the use of CuBr2.
本文介绍了一种经济环保的方法,通过Pd催化的级联环化反应,包括
溴化钯化/Heck交叉偶联/β-H消除,从简单且容易获得的邻炔基
苯乙烯制备3-
溴茚。以O2作为唯一氧化剂,以KBr作为
溴源,合成了一系列多取代3-
溴茚,具有很高的
化学选择性,避免了使用CuBr2。