PS-PEG resin-supported palladium–MOP complexes. Application in asymmetric π-allylic reduction
作者:Heiko Hocke、Yasuhiro Uozumi
DOI:10.1016/j.tet.2004.07.093
日期:2004.10
Homochiral palladium complexes of polymeric 2′-, 6-, and 6′-anchored 2-diphenylphosphino-1,1′-binaphthyl (MOP) ligands were prepared on polystyrene-poly(ethylene glycol) (PS-PEG) resin. The PS-PEG resin-supported palladium–MOP complexes exhibited high catalytic activity, stereoselectivity (up to 80% ee), and recyclability (six times) in the asymmetric allylic reduction of 1-vinyl-1,2,3,4-tetrahydronaphth-1-yl
在聚苯乙烯-聚乙二醇(PS-PEG)树脂上制备了聚合物2'-,6-和6'-固定的2-二苯基膦-1,1'-联萘(MOP)配体的手性钯配合物。PS-PEG树脂负载的钯-MOP复合物在1-乙烯基-1,2,3,4-四氢萘的不对称烯丙基还原中表现出高催化活性,立体选择性(高达80%ee)和可回收性(六次)。苯甲酸-1-基酯得到1-乙烯基-1,2,3,4-四氢萘。