alpha,alpha-Disubstituted selenoamides are synthesized from terminal acetylenes, selenium, amines and allylic bromides in good to high yields; their reduction with LiAlH4 affords alkenylamines quantitatively.
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