Efficient synthesis of 4-vinyl α,β-unsaturated γ-lactams by ring-closing enyne metathesis reactions
作者:Qian Yang、Yuan-Yuan Lai、Wen-Jing Xiao、Howard Alper
DOI:10.1016/j.tetlet.2008.10.051
日期:2008.12
The ring-closing enyne metathesis reaction of alkyl 2-substituted-2-(N-alkynyl acrylamido)esters using the first-generation Grubbs’ catalyst afforded five-membered lactams bearing a 1,3-diene moiety in high isolated yields. In the reaction process, the presence of ethylene gas is essential.
使用第一代Grubbs催化剂进行的烷基2-取代-2-(N-炔基丙烯酰胺基)酯的闭环烯炔复分解反应以高分离产率得到了带有1,3-二烯部分的五元内酰胺。在反应过程中,乙烯气体的存在是必不可少的。