An Asymmetric Biaryl Suzuki Cross-Coupling Reaction: Stereogenic Benzylic Carbinols as Chiral Auxiliaries
作者:Pierre-Emmanuel Broutin、Françoise Colobert
DOI:10.1002/ejoc.200400638
日期:2005.3
Asymmetric biaryl Suzuki coupling reactions were performed with various aryl- or naphthylhalide-bearing enantiomerically pure benzylic alcohols and aryl- or naphthylboronic acids (or esters). The stereogenic benzylic alcohol was introduced by diastereoselective reduction of the arylhalide bearing a β-keto sulfoxide. In the presence of Pd(OAc)2/CsF and dppf or PPh3 excellent yields and atropodiastereoselectivities
不对称联芳 Suzuki 偶联反应是用各种带有芳基或萘基卤化物的对映异构纯苯甲醇和芳基或萘基硼酸(或酯)进行的。通过对带有 β-酮亚砜的芳基卤进行非对映选择性还原来引入立体苯甲醇。在 Pd(OAc)2/CsF 和 dppf 或 PPh3 存在下,获得了优异的产率和 atropodiastereoselectivities。联芳基的绝对构型通过 X 射线晶体学和 1 H NMR NOESY 实验确定。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)