Reactions of α, α-disubstituted selenoamides with organolithium reagents leading to unsymmetrical ketones
摘要:
alpha,alpha-Disubstituted selenoamides were easily converted to unsymmetrical ketones in high yields by the reaction with alkyllithiums, whereas the reaction with alkynyllithium and methyl iodide gave alpha,beta-unsaturated ketone and dialkynylamine. (C) 1998 Elsevier Science Ltd. All rights reserved.
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
Reactions of α, α-disubstituted selenoamides with organolithium reagents leading to unsymmetrical ketones
作者:Toshiaki Murai、Tatsuya Ezaka、Shinzi Kato
DOI:10.1016/s0040-4039(98)00764-3
日期:1998.6
alpha,alpha-Disubstituted selenoamides were easily converted to unsymmetrical ketones in high yields by the reaction with alkyllithiums, whereas the reaction with alkynyllithium and methyl iodide gave alpha,beta-unsaturated ketone and dialkynylamine. (C) 1998 Elsevier Science Ltd. All rights reserved.