Copper(ii)-mediated oxidative cyclization of enamides to oxazoles
作者:Alison E. Wendlandt、Shannon S. Stahl
DOI:10.1039/c2ob25310k
日期:——
The copper(II)-mediated oxidative cyclization of enamides to oxazoles is reported. A range of 2,5-disubstituted oxazoles were prepared in moderate to good yields in two steps from simple amide and alkyne precursors.
A new and concise way to enamides by fluoroalkanosulfonyl fluoride mediated Beckmann rearrangement of α,β-unsaturated ketoximes
作者:Zhaohua Yan、Yun Xu、Weisheng Tian
DOI:10.1016/j.tetlet.2014.10.154
日期:2014.12
The reaction of α,β-unsaturated ketoximes with fluoroalkanosulfonyl fluorides in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) underwent the Beckmannrearrangement smoothly to afford the corresponding acid-sensitive enamides in moderate to excellent yields, which provides a new efficient method for the preparation of acid-sensitive enamides.