Palladium-Catalyzed Addition of 1,3-Diones to Ynamides: An Entry to Alkoxy-Substituted Enamides
作者:Lionel V. Graux、Hervé Clavier、Gérard Buono
DOI:10.1002/cctc.201402398
日期:2014.9
metal‐catalyzed addition reaction of 1,3‐diketones to ynamides, which provides access to unprecedented alkoxy‐substituted enamides, is disclosed herein. A screening of catalytic systems showed that both a phosphapalladacycle and a cationic gold complex were capable of promoting this reaction rapidly and cleanly. The scope investigation revealed that variously substituted terminal ynamides and cyclic 1
本文公开了一种新的金属催化的1,3-二酮与酰胺的加成反应,可提供前所未有的烷氧基取代的酰胺。催化体系的筛选表明,磷铝环烷和阳离子金络合物均能够快速清洁地促进该反应。范围调查显示,各种取代的末端乙酰胺和环状1,3-二酮均具有良好的耐受性。内部酰胺的使用导致 选择性低至良好的E和Z异构体的形成。所提出的机理表明,磷酰四氢环磷酰胺可作为π路易斯酸来激活该乙酰胺。