Multifunctional chiral phosphines-catalyzed highly diastereoselective and enantioselective substitution of Morita–Baylis–Hillman adducts with oxazolones
作者:Yuan-Liang Yang、Cheng-Kui Pei、Min Shi
DOI:10.1039/c1ob00017a
日期:——
Multifunctional chiral phosphine (phosphine–thiourea type) L2-catalyzed allylic substitutions of MBH adducts 1 with oxazolones 2 produce the corresponding optically active adducts 3 in good to excellent yields and ee's as well as moderate to good de's under mild conditions. The synergistic interaction between hydrogen bond donor site and nucleophilic site has been discussed, indicating that finely
多功能手性膦(膦–硫脲类型)在恶性条件下L2催化的MBH加合物1被恶唑酮2的烯丙基取代产生相应的旋光加合物3,良好至极佳的收率和ee,以及中等至良好的de。已经讨论了氢键供体位点和亲核位点之间的协同相互作用,这表明微调多功能膦有机催化剂的活性位非常重要。