Intramolecular Oxycyanation of Alkenes by Cooperative Pd/BPh<sub>3</sub> Catalysis
作者:Dennis C. Koester、Masato Kobayashi、Daniel B. Werz、Yoshiaki Nakao
DOI:10.1021/ja301375c
日期:2012.4.18
intramolecular oxycyanation of alkenes through the cleavage of O-CN bonds and the subsequent insertion of double bonds. The use of 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (Xantphos) as a ligand for palladium is essential for allowing the transformation to proceed with high chemo- and regioselectivity. Variously substituted dihydrobenzofurans with both a tetra-substituted carbon and cyano functionality
钯和三苯基硼烷的协同催化通过 O-CN 键的断裂和随后的双键插入来实现烯烃的分子内氧氰化。使用 4,5-双(二苯基膦)-9,9-二甲基呫吨 (Xantphos) 作为钯的配体对于允许转化以高化学和区域选择性进行是必不可少的。新开发的方法可以访问具有四取代碳和氰基官能团的各种取代的二氢苯并呋喃。