Reactions of vinyltributylgermanes and aryl halides under Heck conditions
摘要:
We describe the palladium-mediated reaction of vinyltributylgermanes with aryl halides under Heck conditions. Depending on their degree of substitution, (E)-vinyltributylgermanes preferentially afford either the cine or Z-alkenyl coupled products in moderate yields. Substituents at the allylic position, especially oxygen, impact regio- and stereoselectivity. (C) 2009 Elsevier Ltd. All rights reserved.