Lithium hydroxide, monohydrate → HCID 66686823, compound

Participants

Reaction Steps

To a solution of ethyl 6-(1-{[3,5-bis(difluoromethyl)-1H-pyrazol-1-yl]acetyl}piperidin-4-yl)pyridine-2-carboxylate (15.5 g) in tetrahydrofuran (160 ml) and water (40 ml) is added, at room temperature, lithium hydroxide monohydrate (1.99 g). The mixture is stirred at room temperature for 1 hour, and then ice-cold 1N HCl solution is added. The aqueous phase is extracted with ethyl acetate. The combined organic phases are dried over sodium sulphate and concentrated under reduced pressure. This gives 6-(1-{[3,5-bis(difluoromethyl)-1H-pyrazol-1-yl]acetyl}piperidin-4-yl)pyridine-2-carboxylic acid (11.5 g).

Provenance & Evidence