Hydrochloric Acid → 6-(4-(2-(Trifluoromethyl)phenoxy)piperidin-1-yl)pyridazine-3-carboxylic acid

Participants

Reaction Steps

A mixture of methyl 6-{4-[2-(trifluoromethyl)phenoxy]piperidin-1-yl}pyridazine-3-carboxylate (800 mg, 2.1 mmol) and lithium hydroxide monohydrate (352 mg, 8.4 mmol) in THF (10 mL) and water (5 mL) was stirred at r.t. overnight, then acidified with 1M aqueous HCl (9 mL). Volatile materials were removed in vacuo. The residue was diluted with water and extracted with EtOAc. The organic extract was washed with diluted brine, dried (Na2SO4), concentrated and swished with Et2O to give the title compound as a white powder. 1H NMR (400 MHz, acetone-d6): δ 1.97 (m, 2H), 2.15-2.21 (m, 2H), 4.00-4.10 (m, 4H), 5.04-5.08 (m, 1H), 7.13 (t, 1H), 7.39 (m, 2H), 7.63-7.69 (m, 2H), 7.94 (d, 1H).

Provenance & Evidence