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
Diastereoselective Synthesis of Secondary Propargylamines Exploiting CuI-Based Promoters and Determination of Their Relative Configuration by DFT-GIAO Conformational Analysis
promoting systems. The reported methodologies were compared in terms of efficiency, diastereoselectivity, and toxicity, both showing advantages with respect to the current methodologies. The relative configurations of each of the obtained propargylamines, previously unknown in the literature, were assigned by comparison of the 1H NMR experimental chemical shifts with those theoretically predicted via the