1-{3-[2-(4-Fluorophenyl)pyrazolo[1,5-a]pyridin-5-yl]phenyl}ethanone → 2-{3-[2-(4-Fluorophenyl)pyrazolo[1,5-a]pyridin-5-yl]phenyl}but-3-yn-2-ol

Participants

Reaction Steps

The procedure described in stage 2.5 is followed, starting with 0.261 g (0.79 mmol) of 1-{3-[2-(4-fluorophenyl)pyrazolo[1,5-a]pyridin-5-yl]phenyl}ethanone obtained in stage 4.1, in solution in 10 ml of tetrahydrofuran, followed by addition of 4.74 ml (2.37 mmol) of an ethynylmagnesium bromide solution (0.5M in tetrahydrofuran) and after chromatography on silica gel, elution being carried out with a mixture of cyclohexane and dichloromethane (1/9), 0.018 g (6%) of the expected product is obtained in the fowl of a white powder.

Provenance & Evidence