Asymmetric Intramolecular Arylcyanation of Unactivated Olefins via C−CN Bond Activation
作者:Mary P. Watson、Eric N. Jacobsen
DOI:10.1021/ja805094j
日期:2008.9.24
The enantioselective, intramolecular arylcyanation of unactivated olefins via C-CN bond activation has been accomplished using a Ni(0) catalyst and BPh3 co-catalyst. High enantioselectivities are achieved using TangPHOS as a chiral ligand. This method allows the generation of two new C-C bonds and one new quaternary carbon stereogenic center in a single synthetic step, converting readily available
使用 Ni(0) 催化剂和 BPh3 助催化剂通过 C-CN 键活化对未活化的烯烃进行对映选择性的分子内芳基氰化。使用 TangPHOS 作为手性配体可实现高对映选择性。该方法允许在单个合成步骤中生成两个新的 CC 键和一个新的四元碳立体中心,将容易获得的苯甲腈底物转化为 1,1-二取代的茚满,产率 49-85%,ee 为 92-97%。