Diastereocontrolled synthesis of pyrrolidines by nickel promoted tandem cyclization-quenching of aminobromodienes
作者:Yolanda Cancho、Joan M. Martín、María Martínez、Amadeu Llebaria、Josep M. Moretó、Antonio Delgado
DOI:10.1016/s0040-4020(97)10220-4
日期:1998.2
aminobromodienes has been extended to the synthesis of 2,3,4-trisubstituted pyrrolidines. By a judicious choice of substituents on the starting aminohalodiene, the diastereoselectivity of the process can be efficiently controlled. When a chiral auxiliary on the nitrogen atom is used, enantiomerically enriched pyrrolidines can be obtained after removal of the auxiliary.
镍促进的束缚氨基溴二茂铁的串联环化淬灭反应已扩展到2,3,4-三取代吡咯烷的合成。通过明智地选择起始氨基卤代二烯上的取代基,可以有效地控制该方法的非对映选择性。当使用氮原子上的手性助剂时,除去助剂后可获得对映体富集的吡咯烷。