Abstract
A stepwise sequence for the interaction of 3-ethoxycarbonyl(acyl)coumarins with cyanoacetylhydrazine, its N-acetyl and N-isopropylidene derivatives, leading to the formation of 3-cyanocoumarins, is proposed and demonstrated. It was established that the 3-cyanocoumarins formed are also able to participate in further conversions by a type of Michael reaction.
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Nemeryuk, M.P., Dimitrova, V.D., Anisimova, O.S. et al. Conversion of Coumarins Accompanied by Opening and Recyclization of the Lactone Ring. 1. Study of the Reaction of 3-Ethoxycarbonyl(3-acyl)coumarins with Cyanoacetylhydrazine and Its Derivatives. Chemistry of Heterocyclic Compounds 39, 1454–1465 (2003). https://doi.org/10.1023/B:COHC.0000014410.73636.dd
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DOI: https://doi.org/10.1023/B:COHC.0000014410.73636.dd