An alternative approach to the synthesis of functionalized pyrido[2,3-b]indoles
作者:Egle M Beccalli、Francesca Clerici、Alessandro Marchesini
DOI:10.1016/s0040-4020(01)00404-5
日期:2001.5
A new synthesis of α-carbolines was developed starting from the easily accessible 3-substituted indol-2(3H)-one derivatives 2 and enamines 3. The intermediates 4 afforded the α-carbolines 5 and 6 by thermal cyclization with ammonium acetate in glacial acetic acid by way of pyridine ring formation.