Substrate-Controlled Regioselective Cobalt(I)-Catalysed 1,4-Hydrovinylation Reactions
作者:Gerhard Hilt、Stefan Roesner
DOI:10.1055/s-0030-1258408
日期:2011.2
substrate-directed regiochemistry of the cobalt-catalysed 1,4-hydrovinylation reaction is described. A variety of symmetrical and unsymmetrical 2,3-disubstituted 1,3-dienes are synthesised by ruthenium-catalysed enyne metathesis, and then reacted with a terminal alkene catalysed by cobalt(II) bromide-[1,2-bis(diphenylphosphino)ethane] [CoBr2(dppe)] under reductive conditions. The regiochemistry of the branched
描述了钴催化的1,4-氢乙烯基化反应的底物定向区域化学。通过钌催化的烯炔复分解合成各种对称和不对称的2,3-二取代的1,3-二烯,然后与溴化钴(II)-[1,2-双(二苯基二膦基)乙烷]催化的末端烯烃反应] [CoBr 2(dppe)]在还原条件下。支链1,4-二烯产物的区域化学受不对称2,3-二取代的1,3-二烯上取代基的性质影响。还讨论了空间效应和电子效应的影响。 烯烃-催化-钴-二烯-区域选择性