Metal-Free Halonium Mediated Acetate Shifts of Ynamides To Access α-Halo Acrylamides/Acrylimides
摘要:
A metal-free acetate shift of 3-acetoxy ynamides to access alpha-iodo, bromo, and chloro acrylamides/acrylimides under very mild conditions is demonstrated. The Inherent alkyne activation of ynamides is sufficient to ensure the a-halo acrylamides/acrylimides in high yields without the addition of a catalyst. In all cases high Z-stereoselectivity is observed.
Metal-Free Halonium Mediated Acetate Shifts of Ynamides To Access α-Halo Acrylamides/Acrylimides
作者:Søren Kramer、Stig D. Friis、Zhuo Xin、Yann Odabachian、Troels Skrydstrup
DOI:10.1021/ol200269h
日期:2011.4.1
A metal-free acetate shift of 3-acetoxy ynamides to access alpha-iodo, bromo, and chloro acrylamides/acrylimides under very mild conditions is demonstrated. The Inherent alkyne activation of ynamides is sufficient to ensure the a-halo acrylamides/acrylimides in high yields without the addition of a catalyst. In all cases high Z-stereoselectivity is observed.