Meglumine catalyzed one-pot green synthesis of novel 4,7-dihydro-1H-pyrazolo[3,4-b]pyridin-6-amines
Meglumine efficiently catalyzes the one-pot, five-component reaction of hydrazine, ethyl acetoacetate, aryl aldehydes, substituted phenylacetonitriles and ammonium acetate in ethanol at room temperature to afford novel 4,7-dihydro-1H-pyrazolo[3,4-b]pyridin-6-amine derivatives. The present approach offers several advantages such as shorter reaction durations, low cost, excellent yields, milder reaction conditions, simple workup procedure and is environment friendly. All the synthesized derivatives are characterized by IR, 1 H NMR, 13 C NMR, HRMS and CHN analysis.
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