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。