Abstract
An efficient synthesis of spiro[indene-2,3′-pyrazole] derivatives via a three-component reaction between ninhydrin, malononitrile, and hydrazonyl chlorides in EtOH at room temperature is described.
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Yavari, I., Nematpour, M. & Sodagar, E. Formation of spiro[indene-2,3′-pyrazole] derivatives from hydrazonyl chlorides and ninhydrin-malononitrile adduct. Monatsh Chem 146, 2135–2138 (2015). https://doi.org/10.1007/s00706-015-1495-7
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DOI: https://doi.org/10.1007/s00706-015-1495-7