Preparation of imidazolines from aziridines and nitriles via TfOH promoted Ritter process
作者:Rui Li、Hui Jiang、Wan-Yi Liu、Pei-Ming Gu、Xue-Qiang Li
DOI:10.1016/j.cclet.2014.01.020
日期:2014.4
An efficient preparation of imidazolines from nitriles and aziridines in the presence of TfOH via Ritter reaction is described. It indicates that different kinds of nitriles can undergo the process. Among the nitriles, pivalonitrile is proven to be better than acetonitrile. The reaction is performed at room temperature and the yields are excellent. (C) 2014 Rui Li and Xue-Qiang Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
A New and Efficient Procedure for Bi(OTf)3-Promoted [3+2] Cycloaddition of N-Tosylaziridines to Yield Imidazolines
[3+2] Cycloaddition of a series of substituted N-tosylaziridines with various nitriles promoted by Bi(OTf)3 is described for the synthesis of substituted imidazolines under mild reaction conditions. The procedure works well over a range of substrates to give the corresponding products in good to excellent yields (up to 99 %).