Copper-Catalyzed Highly Selective Semihydrogenation of Non-Polar Carbon-Carbon Multiple Bonds using a Silane and an Alcohol
作者:Kazuhiko Semba、Tetsuaki Fujihara、Tinghua Xu、Jun Terao、Yasushi Tsuji
DOI:10.1002/adsc.201200200
日期:2012.5.21
NHC ligand was found to be highly efficient for the selective semihydrogenation of non‐polar unsaturated compounds using a mixture of a silane and an alcohol as reducing agent. The catalytic system was useful for the selective semihydrogenation of internal alkynes to (Z)‐alkenes with suppression of overreduction to the corresponding alkanes. Furthermore, semihydrogenations of terminal alkyne, 1,2‐diene
发现带有合适的Xantphos衍生物或NHC配体的铜催化剂对于使用硅烷和醇的混合物作为还原剂的非极性不饱和化合物的选择性半氢化反应非常有效。该催化体系可用于内部炔烃选择性半氢化为(Z)-烯烃,同时抑制过度还原为相应的烷烃。此外,还可以选择性地实现末端炔烃,1,2-二烯,1,3-二烯,1,3-烯炔和1,3-二炔体系的半氢化反应。