Trifluoroacetic acid → HCID 22629192, compound

Participants

Reaction Steps

To a solution of 3-[2-(1-tert-butoxycarbonyl-4-oxopiperidin-3-yl)-3-oxo-2,3-dihydropyridazin-6-yl]-2-phenylpyrazolo[1,5-a]pyridine (500 mg) in dichloromethane (10 ml) was added trifluoroacetic acid (5 ml) at room temperature, and stirred for 2 hours. Solvent was evaporated and removed by toluene azeotrope to give residue, which was chromatographed on silica gel eluting in turn with 5% and 10% methanol in dichloromethane. Fractions containing desired product were collected and concentrated in vacuo to give residue, which was dissolved in methanol and passed through Amberlite IRA-910 (10 ml) eluting with methanol. Solvent was removed under reduced pressure to give 3-[2-(4-oxopiperidin-3-yl)-3-oxo-2,3-dihydropyridazin-6-yl]-2-phenylpyrazolo[1,5-a]pyridine (0.3 g).

Provenance & Evidence