摘要:
Michael adducts of tryptamine, N(1)-methyltryptamine and tryptophane with acrylic esters react with substituted imidazolidines (N(5), N(10)-methylenetetrahydrofolate models) to give enaminones which cyclize under influence of Lewis acid, to give mixtures of tetrahydro-1H-pyrido[3,4-b]indoles and pyrrolo[2,3-d]carbazoles. The influence of the nature of Lewis acid on product formation is discussed. The synthesis of an enantiomerically pure pyrrolo[2,3-d]carbazole system is reported.