A Palladium-Catalyzed Three-Component Cross-Coupling of Conjugated Dienes or Terminal Alkenes with Vinyl Triflates and Boronic Acids
作者:Longyan Liao、Ranjan Jana、Kaveri Balan Urkalan、Matthew S. Sigman
DOI:10.1021/ja201358b
日期:2011.4.20
A three-component coupling of vinyl triflates and boronic acids to alkenes catalyzed by palladium is reported. Using 1,3-dienes, selective 1,2-alkene difunction-alization is observed, whereas the use of terminal alkenes results in 1,1-alkene difunctionalization. The reaction outcome is attributed to the formation of stabilized, cationic Pd-π-allyl intermediates to regulate β-hydride elimination.
报道了由钯催化的乙烯基三氟甲磺酸酯和硼酸与烯烃的三组分偶联。使用 1,3-二烯,观察到选择性 1,2-烯烃双官能化,而使用末端烯烃导致 1,1-烯烃双官能化。反应结果归因于稳定的阳离子 Pd-π-烯丙基中间体的形成,以调节 β-氢化物的消除。