An unusual Michael addition–dealkylation or elimination via the reaction of tertiary or secondary amines with a (Z)-iodoacrylate
作者:Graham Maw、Carl Thirsk、Andrew Whiting
DOI:10.1016/s0040-4039(01)01806-8
日期:2001.11
A series of (E)-ammonium or amino acrylates have been prepared via the Michael addition of methyl (Z)-iodoacrylate and several secondary and tertiary alkylamines. Tertiary amines undergo concomitant addition-dealkylation, almost quantitatively producing (E)-dialkylamino acrylates. (C) 2001 Elsevier Science Ltd. All rights reserved.
Alkynylation of N-tosylimines with aryl acetylenes promoted by ZnBr2 and N,N-diisopropylethylamine in acetonitrile
作者:Ka Young Lee、Chang Gon Lee、Jeong Eun Na、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2004.11.046
日期:2005.1
We found a suitable condition for the effective alkynylation of N-tosylimines with aryl acetylenes. The reaction tosylimines and aryl acetylenes in the presence of ZnBr2, and DIEA (N,N -diisopropylethylamine) in CH3CN afforded the desired N-tosyl propargylamines in moderate to good yields. (C) 2004 Elsevier Ltd. All rights reserved.