An efficient synthesis of tetrahydropyrazolopyridine derivatives by a one-pot tandem multi-component reaction in a green media

The synthesis of some tetrahydropyrazolopyridine derivatives has been described by a one-pot 2A + 2B + C + D four component reaction of a 1,3-dicarbonyl compound, an aldehyde, hydrazine and ammonium acetate in ethanol as a green media under catalyst-free condition.