Asymmetric hydrogenation of alkyl(vinyl)thioethers: a promising approach to α-chiral thioethers
摘要:
This paper describes the enantio selective hydrogenation of vinylthioethers. We show that thioether derivatives of maleic esters can be hydrogenated with full conversion and up to 60% ee, and that alpha-thioether cinnamic acids can be hydrogenated in 51% ee with modest conversion. (c) 2007 Elsevier Ltd. All rights reserved.
Three-component synthesis of stable ketenimines containing a sulfur group based on a capture profile of a zwitterionic intermediate is described. Thus, the reactions of zwitterions, generated from isocyanide and dialkyl acetylenedicarboxylate, react with alkyl mercaptans in CH2Cl2 to afford ketenimines in good yields. GRAPHICAL ABSTRACT
Asymmetric hydrogenation of alkyl(vinyl)thioethers: a promising approach to α-chiral thioethers
作者:Alex F. Meindertsma、Michael M. Pollard、Ben L. Feringa、Johannes G. de Vries、Adriaan J. Minnaard
DOI:10.1016/j.tetasy.2007.11.020
日期:2007.12
This paper describes the enantio selective hydrogenation of vinylthioethers. We show that thioether derivatives of maleic esters can be hydrogenated with full conversion and up to 60% ee, and that alpha-thioether cinnamic acids can be hydrogenated in 51% ee with modest conversion. (c) 2007 Elsevier Ltd. All rights reserved.