Abstract
ZnO nanoparticles as a highly effective heterogeneous base catalyst selectively catalyzes the reaction between salicylaldehydes and dialkyl acetylenedicarboxylates in ionic liquid [bmim]BF4 to obtain 4-hydroxy-4H-chromenes in high to excellent yields. The advantages of this method include the selectivity of reaction, one-pot procedure, mild reaction conditions, operational simplicity, and use of inexpensive and non-toxic catalyst.
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The partial financial assistance from the Research Vice Chancellor of Azarbaijan Shahid Madani University is gratefully acknowledged.
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Dinparast, L., Valizadeh, H. ZnO nanoparticles as an efficient catalyst for the selective synthesis of 4-hydroxychromenes via the reaction of salicylaldehydes with dimethyl or diethyl acetylenedicarboxylate in [bmim]BF4 . Monatsh Chem 146, 313–319 (2015). https://doi.org/10.1007/s00706-014-1323-5
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DOI: https://doi.org/10.1007/s00706-014-1323-5