This paper describes an unexpected and novel nucleophilic phosphine-catalyzed annulation of ethyl (arylimino)acetates to give polysubstituted oxoimidazolidine derivatives in moderate to good yields from simple and easily available starting materials under mild conditions. In this reaction, the addition of methyl vinyl ketone (MVK) is essential to induce the formation of oxoimidazolidines.
本文描述了一种意想不到且新颖的核亲电
磷 catalyst催化的即 ethyl (arylimino)acetates环化反应,能够在温和条件下,从简单且易获得的起始材料中以中等到良好的产率合成多取代的
氧杂
咪唑啉衍
生物。在此反应中,
甲基乙烯基酮(MVK)的添加是诱导
氧杂
咪唑啉形成的关键。