Synthesis of Pyrrolidines by Anionic Cyclization onto Allylic Ethers, Alkynes and Carboxylic Groups
摘要:
alpha-Amino-methylstannanes with pendent allylic ether, alkyne or carboxylic groups, can be converted, on treatment with butyllithium, to 3-vinyl-, 3-methylene- or 3-keto-pyrrolidines by anionic cyclization. (C) 1997 Elsevier Science Ltd.
Silica gel accelerated aza-Michael addition of amines to α,β-unsaturated amides
作者:Lisha You、Song Feng、Rui An、Xinhong Wang、Donglu Bai
DOI:10.1016/j.tetlet.2008.06.099
日期:2008.8
A novel method to synthesize beta-amino amide has been developed via Conjugated addition of amine to bulky alpha,beta-unsaturated amides promoted by silica gel. The silica gel worked efficiently to accelerate the reaction and afforded the related adduct in good to excellent yield (C) 2008 Elsevier Ltd. All rights reserved.