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
已经使用活性钡作为 THF 中的低价金属实现了偶氮化合物与 γ-三烷基甲硅烷基化炔丙基溴的 Barbier 型炔丙基化。相应的炔丙基化肼(α-加合物)不仅由偶氮苯(二芳基二氮烯)而且还由偶氮二羧酸二烷基酯形成。该方法也适用于 γ-烷基化或 γ-苯基化炔丙基溴,仅提供所需的炔丙基化产物。