Highly stereoselective aziridination of imines with (S)-dimethylsulfonium-(p-tolylsulfinyl)methylide
摘要:
Addition of (S)-dimethylsulfonium-(p-tolylsulfinyl)methylide to N-tosyl imines afforded the corresponding sulfinyl aziridines with full enantio- and diastereoselectivity. The chiral sulfinyl substituent was removed without ring opening leading to enantiopure 2-substituted aziridines. (C) 2007 Elsevier Ltd. All rights reserved.
Limitations, mechanism and understanding of the origins of stereocontrol in (S)-dimethylsulfonium-(p-tolylsulfinyl)methylide-mediated epoxidation reactions
作者:Wanda H. Midura、Marek Cypryk
DOI:10.1016/j.tetasy.2010.01.012
日期:2010.2
The reaction of the (S)-dimethylsulfonium-(p-tolylsulfinyl)methylide with aldehydes gave alpha,beta-epoxy sulfoxides with high enantioselectivity and diastereoselectivity dependent on the aldehyde. The mechanism of the 'model' reactions [ylide substituted with Me S(O) or Ph S(O) with MeCHO or PhCHO] has been studied in detail using density functional theory. (C) 2010 Elsevier Ltd. All rights reserved.