The Pyrrolidine‐Catalyzed Three‐Component Reactions of Azlactones,<i>N,O</i>‐Acetals and Alcohols: One‐Pot Synthesis of α,β‐Diamino Esters
作者:Haipeng Hu、Xin Wu、Beining Wang、Liuying Zhao、Junyu Wang、Zhiyu Jiang
DOI:10.1002/adsc.202300454
日期:2023.8.10
pyrrolidine-catalyzed three-component reaction of azlactone, N,O-acetal and alcohol for the synthesis of α,β-diamino ester was reported. The N,O-acetal served as the imine equivalent to occur Mannich reaction with azlactone, and the in situ generated α-functionalized azlactone subsequently underwent a ring-opening process in the presence of alcohol. A series of α,β-diamino esters were obtained in 36–99% yields
报道了吡咯烷催化二氢唑酮、N,O-缩醛和醇的三组分反应合成α,β-二氨基酯。N ,O-缩醛作为亚胺等价物与吖内酯发生曼尼希反应,原位生成的α-官能化吖内酯随后在醇存在下经历开环过程。在温和的反应条件下,以 36-99% 的产率获得了一系列 α,β-二氨基酯。该产品可以克级合成并转化为α,β-二氨基酸。