Double Stereodifferentiation in the Catalytic Asymmetric Aziridination of Imines Prepared from α-Chiral Amines
作者:Li Huang、Yu Zhang、Richard J. Staples、Rui H. Huang、William D. Wulff
DOI:10.1002/chem.201102520
日期:2012.4.23
The catalyticasymmetricaziridination of imines and diazo compounds (AZ reaction) mediated by boroxinate catalysts derived from the VANOL and VAPOL ligands was investigated with chiral imines derived from five different chiral, disubstituted, methyl amines. The strongest matched and mismatched reactions with the two enantiomers of the catalyst were noted with disubstituted methyl amines that had one
A synthesis of aziridine esters based on the cyclisation of amino selanyl esters induced by the selanyl group activation was developed with either the Meerwein salt or NBS. Twoasymmetricapproaches are proposed: the diastereoselective reductions of α-selanyl β-iminoesters derived from α-oxoesters, which lead to cis chiral aziridine esters 6 and 6′; and the diastereoselective conjugate additions of