One-Pot, Three-Component Synthesis of 7-Azaindole Derivatives from N-Substituted 2-Amino-4-cyanopyrroles, Various Aldehydes, and Active Methylene Compounds
作者:Marcelo Vilches-Herrera、Ingo Knepper、Nayane de Souza、Alexander Villinger、Vyacheslav Ya. Sosnovskikh、Viktor O. Iaroshenko
DOI:10.1021/co300042v
日期:2012.7.9
practical route to 7-azaindole framework has been developed by one-pot, three-component cyclocondensation of N-substituted 2-amino-4-cyanopyrroles, various aldehydes, and active methylene compounds in ethanol or acetic acid at reflux. Reactions involving tetronic acid, indane-1,3-dione, dimedone, and 5-phenylcyclohexane-1,3-dione gave carbocyclic fused 7-azaindoles, whereas Meldrum’s acid, benzoylacetonitrile
通过N-取代的2-氨基-4-氰基吡咯,各种醛和活性亚甲基化合物在回流下在乙醇或乙酸中的一锅,三组分环缩合,已经开发出一种有效且实用的通往7-氮杂吲哚骨架的途径。涉及tetronic酸,茚满-1,3-二酮,二酮和5-苯基环己烷-1,3-二酮的反应生成碳环稠合的7-氮杂吲哚,而Meldrum的酸,苯甲酰基乙腈和丙二腈则生成高度取代的7-氮杂吲哚衍生物,使该策略在面向多样性的综合(DOS)中非常有用。