Enhancing the Scope of the Diels–Alder Reaction through Isonitrile Chemistry: Emergence of a New Class of Acyl-Activated Dienophiles
作者:Steven D. Townsend、Xiangyang Wu、Samuel J. Danishefsky
DOI:10.1021/ja303876e
日期:2012.6.27
valuable family of dienophiles for servicing Diels-Alder reactions. These systems are assembled through extension of recently discovered isonitrile chemistry to the domain of α,β-unsaturated acids. Cycloadditions are facilitated by Et(2)AlCl, presumably via chelation between the two carbonyl groups of the N-formyl amide. Applications of the isonitrile/Diels-Alder logic to the IMDA reaction, as well as methodologies
α,β-不饱和酰亚胺,在氮原子上甲酰化,构成了一个新的有价值的亲二烯体家族,用于服务 Diels-Alder 反应。这些系统是通过将最近发现的异腈化学扩展到 α,β-不饱和酸的结构域来组装的。Et(2)AlCl 促进了环加成,大概是通过 N-甲酰胺的两个羰基之间的螯合。描述了异腈/狄尔斯-阿尔德逻辑在 IMDA 反应中的应用,以及修饰所得环加成产物的 N-甲酰胺的方法。预计这种易于执行的化学反应将为 Diels-Alder 反应在许多合成目标上的应用提供显着增强。