1H-PYRIDO[3,2-<i>b</i>]INDOLES. SYNTHESIS AND INVESTIGATION OF SOME THEIR SPECTROSCOPIC AND CHEMICAL PROPERTIES
DOI:
https://doi.org/10.1007/75Keywords:
indole, indolineacrylic acid, carboline, malononitrile, pyridoindole, cyanoacetonitrileAbstract
At boiling in trifluoroacetic acid derivatives of 3-cyanovinyl-3-p-nitrophenylaminoindole are cyclized into the corresponding pyrido[3,2-b]indoles as a results of activation of the CN group. Thermal cyclization of ethyl indolylacrylate occurs with participation of the more reactive ethoxycarbonyl group to give 3-cyanopyrido[3,2-b]indole.
Authors: S. Yu. Ryabova, L. M. Alekseeva, and B. G. Granik.
English Translation in Chemistry of Heterocyclic Compounds, 2000, 36 (3), pp 301-306