Selective Propargylation of Azo Compounds with Barium Reagents
作者:Akira Yanagisawa、Takanori Koide、Kazuhiro Yoshida
DOI:10.1055/s-0029-1219944
日期:2010.6
A Barbier-type propargylation of azo compounds with γ-trialkylsilylated propargylic bromides has been achieved using reactive barium as a low-valent metal in THF. Corresponding propargylated hydrazines (α-adducts) were exclusively formed not only from azobenzenes (diaryldiazenes) but also from dialkyl azodicarboxylates. This method is also applicable to γ-alkylated or γ-phenylated propargylic bromides