4-Aminoindoles as 1,4-bisnucleophiles for diversity-oriented synthesis of tricyclic indoles bearing 3,4-fused seven-membered rings
作者:Shaomin Chen、Palanisamy Ravichandiran、Ahmed El-Harairy、Yves Queneau、Minghao Li、Yanlong Gu
DOI:10.1039/c9ob01045a
日期:——
A straightforward access to tricyclic indoles bearing 3,4-fused seven-membered rings has been established by using 4-aminoindoles as 1,4-bisnucleophiles in three-component reactions. 1H-Azepino[4,3,2-cd]indoles, 4,6-dihydro-1H-azepino[4,3,2-cd]indoles and 1,3,4,6-tetrahydro-5H-azepino[4,3,2-cd]indol-5-ones could thus be synthesized in one pot in moderate to good yields. Beyond opening access to 3,4-fused
通过在三组分反应中使用4-氨基吲哚作为1,4-双亲核试剂,已经可以直接获得带有3,4-稠合七元环的三环吲哚。1H-Azepino [4,3,2-cd]吲哚,4,6-二氢-1H-azepino [4,3,2-cd]吲哚和1,3,4,6-四氢-5H-azepino [4,因此,可以在一锅中以中等至良好的产率合成3,2-cd]吲哚-5-酮。除了开放获取3,4-稠合的三环吲哚之外,使用易于获得的4-氨基吲哚作为C,N-1,4-双亲核试剂还提供了一个新的平台,可用于面向多样性的合成策略,充分展示了其优势最大限度地提高分子复杂性和反应多样性。