A Cascade Palladium-Mediated Cross-Coupling/Electrocyclization Approach to the Construction of Fused Bi- and Tricyclic Rings
作者:S. B. Jennifer Kan、Edward A. Anderson
DOI:10.1021/ol8007952
日期:2008.6.5
A versatile palladium-catalyzed cyclization/cross-coupling/electrocyclization strategy for the synthesis of fused bi- and tricyclic ring systems is described. Excellent yields of the polycyclic products are obtained with a range of tethering ring sizes and functionality, including an unprecedented 5,6,4,5-fused tetracycle. The reaction mechanism features two unusual palladium-mediated isomerizations
描述了一种通用的钯催化的环化/交叉偶联/电环化策略,用于合成稠合的双环和三环系统。通过一系列的束缚环大小和功能性(包括前所未有的5,6,4,5-稠合四环),可获得优异的多环产物收率。在电环化之前,反应机理具有两个不同寻常的钯介导的异构化作用。