Asymmetric aziridination by reaction of chiral N-sulfinylimines with sulfur ylides: Stereoselectivity improvement by use of tert-butylsulfinyl group as chiral auxiliary
作者:JoséL García Ruano、Inmaculada Fernández、Miriam del Prado Catalina、Ana Alcudia Cruz
DOI:10.1016/s0957-4166(96)00448-x
日期:1996.12
Chiral tert-butylsulfinyl group has been shown to be the chiral auxiliary of choice for the asymmetric aziridination of N-sulfinyliminas. Moreover, the sense of the asymmetric induction can be tuned in two ways: the chirality at the tert-butylsulfinyl Sulfur, or the nature of the methylene transfer reagent used. Thus, both aziridines 10(Ss,S) and 10(Rs,R), epimeric at C-2, were obtained in enantiomerically
已显示手性叔丁基亚磺酰基是N-亚磺酰亚胺基团的不对称叠氮化的选择的手性助剂。此外,不对称诱导的意义可以通过两种方式进行调节:叔丁基亚磺酰基硫的手性,或所用亚甲基转移试剂的性质。因此,通过单结晶(75%收率)以对映体纯的形式获得在C-2上差向异构的氮丙啶10(S s,S)和10(R s,R)。