A Pd(II)-catalyzed direct aerobic dehydrogenation of γ,δ-olefinic acids and amides has been demonstrated. The present protocol dehydrogenates the least acidic amides and acids, thus replacing the traditional enolate strategy for dehydrogenation. A broad spectrum of conjugated dienamides and dienoic acids were produced in good to excellent yields. A possible reaction mechanism was proposed and supported
已经证明了 Pd( II ) 催化的 γ,δ-烯酸和酰胺的直接需氧脱氢。本协议脱氢最少的酸性酰胺和酸,从而取代了传统的烯醇脱氢策略。以良好至优异的产率生产了广谱的共轭二酰胺和二烯酸。氘标记研究提出并支持了一种可能的反应机制。
Copper(I)-Catalyzed IntramolecularAddition of<i>N</i>-Chloroamides to Double Bonds;an Efficient Synthesis of Lactams from Unsaturated Amides
作者:Richard Göttlich、Iris Anne Schulte-Wülwer、Juho Helaja
DOI:10.1055/s-2003-40997
日期:——
Copper(1) salts catalyse the intramolecular addition of N-chloramides to carbon-carbon double bonds leading to lactams in almost quantitative yield.