A series of pyranopyrazoles, namely, 7-(2-aminoethyl)-3,4-dimethyl-1-phenyl-1H-pyrazolo[3,4-b]pyridin-6(7H)-one (2), (Z)-3,4-dimethyl-1-(4-((4-nitrobenzylidene)amino)phenyl)pyrano[2,3-c]pyrazol-6(1H)-one (5), 1-(4-(3,4-dimethyl-6-oxopyrano[2,3-c]pyrazol-1(6H)-yl)phenyl)-3-(naphthalen-1-yl)urea (6), (Z)-ethyl 4-((3,4-dimethyl-6-oxo-1,6-dihydropyrano[2,3-c]pyrazol-5-yl)diazenyl)benzoate (8) and 3...

The CuSnO3:SiO2 catalyst was synthesized by hydrothermal method. polycrystalline products were analyzed using various physical investigative techniques including XRD, SEM, TEM and BET surface area. present study deals with one-pot, four component reaction of aldehydes, malononitrile hydrazine hydrate ethyl acetoacetate in the presence catalytic amount Silica grafted CuSnO3 ethanol at 70°C to pr...

Pyranopyrazoles are known to exhibit a wide range of biological activities. 1-2 Some pyranopyrazoles have been evaluated for their bovine brain adenosine A 1 A 2A receptor binding affinity and these pyranopyrazoles are also of interest because of their structural similarity to a wide variety of flavones and flavanones that exhibit interesting biological activity. 1-2 Although the synthesis of s...

Regioselective synthesis of highly functionalized pyranopyrazoles was achieved in excellent yield from phenyl pyrazolone, substituted aromatic aldehyde with nitroketene-N,S-acetal in the presence of indium trichloride as a versatile catalyst under reflux condition in ethanol-water mixture. All reactions preceeded within a short period of time with excellent purity. All of the synthesized compou...

regioselective synthesis of highly functionalized pyranopyrazoles was achieved in excellent yield from phenyl pyrazolone, substituted aromatic aldehyde with nitroketene-n,s-acetal in the presence of indium trichloride as a versatile catalyst under reflux condition in ethanol-water mixture. all reactions preceeded within a short period of time with excellent purity. all of the synthesized compou...