Chemistry of Heterocyclic Ketene Aminals: Construction of Imidazo(pyrido)[1,2-<i>a</i>]pyridines and Imidazo(pyrido)[3,2,1-<i>ij</i>][1,8]naphthyridines via DABCO-Catalyzed Tandem Annulations
作者:Ming Li、Zhong-Min Zhou、Li-Rong Wen、Zhong-Xuan Qiu
DOI:10.1021/jo102167g
日期:2011.5.6
2-(2-Chloroaroyl)methyleneimidazolidines with four reactive sites show fascinating structural features and could be used as a new strategy for the synthesis of novel heterocycles. This paper presents our new findings in the reaction of 2-(2-chloroaroyl)methyleneimidazolidines with allenic esters affording functionalized imidazo(pyrido)[1,2-a]pyridines via DABCO-catalyzed tandem annulations. Of particular
具有四个反应位点的2-(2-氯代芳酰基)亚甲基咪唑烷显示出令人着迷的结构特征,可以用作合成新杂环的新策略。本文介绍了我们的新发现,在2-(2-氯芳酰基)亚甲基咪唑烷与烯丙酸酯的反应中,通过DABCO催化串联环合提供官能化的咪唑并(吡啶基)[1,2- a ]吡啶。特别重要的是掺入ø卤代组成的2-benzoylmethylene-咪唑烷芳基环,以建立一个方便的和一般的方式用于构造不寻常的咪唑并(吡啶基)[3,2,1 IJ ] [1,8萘啶。