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Green and efficient method for the synthesis of 1,5-benzodiazipines using phosphate fertilizers as catalysts under free solvent

Sibous Sibous, Touriya Ghailane, Serrar Houda, Rachida Ghailane, Said Boukhris, Abdelaziz Souizi


Three-component reaction in one pot transformation of aldehydes, ethylacetoacetate and o-phenylenediamine was employed for the synthesis, under solvent-free, of 1,5-benzodiazepine derivatives using  fertilizers mono-ammonium  phosphate (MAP), di-ammonium Phosphate (DAP) and triple super phosphate (TSP) as safe, clean, and recyclable catalysts. The synthesis method seems to be operationally simple and provides access to a variety of 1,5-benzodiazepines with excellent yields in a short reaction time. 

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