Regiospecific intramolecular ring-closure of heterocumulene-substituted indoles: Formation of γ-carbolines and pyrimido[3,4-a]indoles
作者:Pedro Molina、Julian Alcantara、Carmen Lopez-Leonardo
DOI:10.1016/0040-4039(94)02399-v
日期:1995.2
2-(lndol-2-yl)ethyl heterocumulenes undergo ring-closure under acid, basic and thermal conditions to give either dihydro gamma-carbolines or dihydropyrimido[3,4-a]indoles in a completely regiospecific fashion. The mode of cyclization strongly depends on the cyclizating agent as well as the nature of the heterocumulene.