An Efficient Synthetic Method of 4-Penteneselenoamides: Four-Component Coupling Reaction of Terminal Acetylenes, Selenium, Amines, and Allylic Bromides
作者:Toshiaki Murai、Tatsuya Ezaka、Shinzi Kato
DOI:10.1246/bcsj.71.1193
日期:1998.5
The reaction of lithium alkyneselenolates generated from terminal acetylenes, butyllithium, and selenium with amines and allylic bromides proceeded smoothly in THF at 67 °C to give 4-penteneselenoamides in moderate to high yields. The reaction may proceed via selenoketene intermediates bearing an allylic group, followed by the attack of amines to give the products. Aliphatic and aromatic acetylenes
由末端乙炔、丁基锂和硒生成的烷基烯醇酸锂与胺和烯丙基溴在 67°C 下在 THF 中顺利进行反应,以中等至高产率得到 4-戊烯硒酰胺。该反应可以通过带有烯丙基基团的硒烯中间体进行,然后是胺的攻击以得到产物。脂肪族和芳香族乙炔、甲硅烷基乙炔和烯炔用作末端乙炔。一摩尔量的仲胺是有效的,而过量的伯胺是必要的。与 2-丁烯基溴的反应表现出高区域选择性,尽管它们产生立体异构混合物。炔丙醇的甲硅烷基醚反应生成α,β-不饱和硒酰胺作为产物。