1H-pyrido[3,2-b]indoles. Synthesis and investigation of some their spectroscopic and chemical properties

Article abstract of DOI:10.1007/BF02256867

At boiling in trifluoroacetic acid derivatives of 3-cyanovinyl-3-p-nitrophenylaminoindole are cyclized into the corresponding pyrido[3,2-b]indoles as a result of activation of the CN group. Thermal cyclization of ethyl indolylacrylate occurs with particip