Abstract
An efficient one-pot reaction of dialkyl acetylenedicarboxylates with 2,4-dihydroxybenzo(or aceto)phenones in the presence of triphenylphosphine produces 5-hydroxy- and 7-hydroxycoumarin derivatives. The novel procedure features short reaction time, fairly good yields, and simple workup.
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We are grateful for the financial support of Mazandaran University of the Islamic Republic of Iran.
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Baharfar, R., Vahdat, S.M. & Hakimabadi, F.G. A chemoselective and one-pot synthesis of 5-hydroxy and 7-hydroxy coumarin derivatives. Monatsh Chem 140, 489–493 (2009). https://doi.org/10.1007/s00706-008-0078-2
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DOI: https://doi.org/10.1007/s00706-008-0078-2