Y(OTf)3-Catalyzed Diastereoselective [3+2] Cycloaddition of N-Tosylaziridines and Imines; Efficient Synthesis of Multisubstituted Imidazolidines
作者:Junliang Zhang、Xingxing Wu
DOI:10.1055/s-0031-1290816
日期:2012.7
Abstract An efficient Y(OTf)3-catalyzed generation of azomethine ylides from donor–acceptor aziridines and their [3+2] cycloaddition with imines was developed. The method provides facile access to multisubstituted imidazolidines, which have been extensively used in organic synthesis. Furthermore, a three-component reaction on a gram scale and an asymmetric variation were also developed in this work
Nickel(ii)-catalyzed diastereoselective [3+2] cycloaddition of N-tosyl-aziridines and aldehydes via selective carbon–carbon bond cleavage
作者:Xingxing Wu、Lei Li、Junliang Zhang
DOI:10.1039/c1cc12189h
日期:——
An efficient and mild Ni(ClO4)2-catalyzed [3+2] cycloaddition of N-tosylaziridines and aldehydesvia CâC bond cleavage was developed. The cycloaddition reaction proceeds with high diastereoselectivity and regioselectivity leading to highly substituted 1,3-oxazolidines. Notably, this novel reaction can be easily expanded to gram level scale and the thermal conditions cannot achieve the same transformation.