Microwave enhanced cross-coupling reactions involving alkenyl- and alkynyltrifluoroborates
摘要:
Cross-coupling reactions of potassium arylvinyltrifluoroborates with aryl iodides in the presence of a palladium catalyst Occur rapidly utilizing microwave irradiation. The Coupled products are produced in excellent yields. Alkynyltrifluoroborates also undergo the Coupling reaction. (c) 2005 Published by Elsevier Ltd.
Feeding the Heck Reaction with Alcohol: One-Pot Synthesis of Stilbenes from Aryl Alcohols and Bromides
作者:Paul Colbon、Jonathan H. Barnard、Mark Purdie、Keith Mulholland、Ivan Kozhevnikov、Jianliang Xiao
DOI:10.1002/adsc.201200340
日期:2012.5.21
Aryl alcohols are employed as feedstock for the Heck reaction. Keggin‐type heteropolyacids catalyse the selective dehydration of the alcohols to styrenes, which, in one‐pot, undergo palladium‐catalysed Heck arylation with aryl bromides, affording broadly functionalised stilbenes. The choice of solvent is critical for the cascade dehydration–Heck reaction, with electron‐rich aryl alcohols preferring