3-Alkylated indoles, obtained by three-component reactions of
indole, aldehydes, and N,N-dimethylbarbituric acid, afford indolo[3,2-b]carbazoles in excellent yields
under thermal conditions in acetic acid.
heterocycles - indoles - aldehydes - indolo[3,2-b]carbazole -
N,N-dimethylbarbituric
acid