Stereoselective Cross-Coupling Reaction of 1,1-Diboryl-1-alkenes with Electrophiles: A Highly Stereocontrolled Approach to 1,1,2-Triaryl-1-alkenes
作者:Masaki Shimizu、Chihiro Nakamaki、Katsuhiro Shimono、Michael Schelper、Takuya Kurahashi、Tamejiro Hiyama
DOI:10.1021/ja054484g
日期:2005.9.1
Palladium-catalyzed cross-coupling reaction of 1,1-diboryl-1-alkenes with aryl and alkenyl iodides was found to proceed stereoselectively, giving rise to the corresponding mono-coupled product as a single diastereomer with E-configuration. Second coupling of the initial product with another aryl iodide affords diverse triarylalkenes in their stereochemically pure form. This highly stereoselective approach
发现钯催化的 1,1-二硼基-1-烯烃与芳基和烯基碘化物的交叉偶联反应立体选择性地进行,产生相应的单偶联产物,作为具有 E 构型的单个非对映异构体。初始产物与另一种芳基碘化物的第二次偶联得到立体化学纯形式的各种三芳基烯烃。这种三芳基烯烃的高度立体选择性方法允许人们在一个锅中从 1,1-二硼基-1-烯烃合成两种非对映异构体。