Abstract
Reactions of 2-(3,3-diamino-2-cyanoprop-2-enylidene)indolin-3-ones with amide acetals afforded derivatives of 3-aminomethyleneamino-2-cyano-9-oxo-9H-pyrrolo[1,2-a]indole and 3-amino-2-cyano-9-oxo-9H-pyrrolo[1,2-a]indole. The rate and pathway of the reaction depend on the reagents and solvents. The formation schemes for the compounds obtained were proposed. Their structures were proven by IR and 1H NMR spectroscopy and mass spectrometry and confirmed by independent syntheses.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2186–2192, December, 2006.
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Ryabova, S.Y., Alekseeva, L.M., Lisitsa, E.A. et al. A new approach to the synthesis of pyrrolo[1,2-a]indole derivatives. Russ Chem Bull 55, 2271–2277 (2006). https://doi.org/10.1007/s11172-006-0582-7
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DOI: https://doi.org/10.1007/s11172-006-0582-7