Recyclization of 2-imino-2H-1-benzopyrans using nucleophilic reagents 3. Reaction of 2-iminocoumarin-3-carboxamides with <i>o</i>-phenylenediamines and <i>o</i>-amino(thio)phenols

Abstract

Using o-phenylenediamines, o-aminophenol or o-aminothiophenol, 2-iminocoumarin-3-carboxamide can be recyclized to the corresponding 3-(1H-benzimidazol-2-yl), 3-(benzoxazol-2-yl), or 3-(benzothiazol-2-yl) coumarins. An alternative synthesis has been carried out and an analytical comparison of the synthetic routes made.

How to Cite
Kovalenko, S. N.; Vasil'ev, M. V.; Sorokina, I. V.; Chernykh, V. P.; Turov, A. V.; Rudnev, S. A. Chem. Heterocycl. Compd. 1998, 34, 1412. [Khim. Geterotsikl. Soedin. 1998, 1664.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF02317811