2-Hydrazinopyridine → 3,6,6-Trimethyl-1-pyridin-2-yl-5,7-dihydroindazol-4-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-acetyl-5,5-dimethyl-cyclohexane-1,3-dione (0.5 g, 2.75 mmol), prepared as described in example 2, and 2-hydrazino-pyridine (0.3 g, 2.75 mmol) in ethanol (15 ml) was stirred at 80° C. for 4 hours. After evaporation of the solvent, the residue was chromatographed on silica gel (cyclohexane:ethyl acetate=10:20). The title compound was obtained as a colourless solid (0.5 g, 73%): m.p. 122-123° C.

Provenance & Evidence