Synthesis of 2-Alkyl-Substituted 1,3-Diketones via the 1,4-Addition of the Grignard Reagents to α,β-Unsaturated Imidates
作者:Seiichi Inoue、Osamu Suzuki、Kikumasa Sato
DOI:10.1246/bcsj.62.1601
日期:1989.5
formed by the reaction of methyl N-phenylacrylimidate with ethylmagnesium bromide in 80% yield. Similar diketones were obtained from methyl N-phenylcrotonimidate and N-phenylcinnamimidate with the Grignardreagents. The coupling of N-magnesio α-methoxy enamine and ketenimine, both of which are formed through the initial 1,4-addition of the Grignardreagent to α,β-unsaturatedimidate, is the most plausible