Asymmetric α-2-tosylvinylation of in situ-generated N-2-tosylvinyl proline-derived ammonium ylides
作者:Tomohito Igarashi、Eiji Tayama、Hajime Iwamoto、Eietsu Hasegawa
DOI:10.1016/j.tetlet.2011.02.040
日期:2011.4
Asymmetric alpha-2-tosylvinylation of N-substituted proline esters using ethynyl tolyl sulfone as an electrophile was shown to proceed in good yield with high enantioselectivities without the addition of any bases. The reaction proceeds via the formation of N-2-tosylvinyl ammonium ylides. (C) 2011 Elsevier Ltd. All rights reserved.