Abstract
A dioxomolybdenum(VI) complex has been successfully prepared by the reaction of an ONO donor Schiff base, derived by condensing 3-methoxysalicylaldehyde and 4-amino-2-hydroxybenzohydrazide, with MoO2(acac)2. The structures of synthesized products were explored spectroscopically through FT-IR, 1H and 13C NMR and by elemental composition (CHN) through combustion analysis. The catalytic potential of the complex was explored to synthesize the substituted 4H-pyrans through the domino Knoevenagel condensation, Michael addition and cycloaddition reaction. In this method, three-component condensation of various aryl aldehydes with malononitrile and 1,3-dicarbonyl compounds was carried out in refluxed ethanol. The main advantages of the present catalytic work are less time required for the completion of the reaction, high percentage yield and simplicity in operation.
Acknowledgments
The authors are thankful to the Ardakan University and Payame Noor University for practical support of this study.
Disclosure statement
No potential conflict of interest was reported by the authors.