ABSTRACT
We report a one-pot method for the synthesis of various substituted 1,3-dimethyl-2,4,6-trioxohexahydropyrimidin-5-yl phosphonate derivatives via phosphorus-carbon bond formation through domino Knoevenagel–phospha–Michael reaction. Multi-walled carbon nanotube‒CO‒NH(CH2)2NH-SO3H was used as an acidic heterogeneous catalyst. The catalyst could be used four times without losing its catalytic activity. The structures of the products were determined by FT-IR spectra, 1H-, 13C- and 31P- Nuclear Magnetic Resonance and elemental analysis. Recovery and reusability of catalyst, simplicity, applicability, good reaction time and good yields of products are the benefits of this work.
Acknowledgments
We gratefully acknowledge the financial support of this work by Marvdasht Islamic Azad University research council.