Abstract
Condensation of cyclopentanonopimaric acid with malononitrile in the presence of p-methoxybenzaldehyde or elemental sulfur gave the corresponding fused 2-amino-3-cyano-4-(4-methoxyphenyl)-4H-pyrano and 2-amino-3-cyanothieno derivatives.
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Tret'yakova, E.V., Flekhter, O.B., Galin, F.Z. et al. Synthesis of 2-Amino-4-aryl-3-cyano-4H-pyrano and 2-Amino-3-cyanothieno Derivatives of Cyclopentanonopimaric Acid. Russian Journal of Organic Chemistry 39, 1738–1740 (2003). https://doi.org/10.1023/B:RUJO.0000019737.78635.bd
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DOI: https://doi.org/10.1023/B:RUJO.0000019737.78635.bd