Hydrochloric Acid → 4-(2-fluoro-4-(methylthio)phenylamino)-N-(2-hydroxyethoxy)-1-methyl-6-oxo-1,6-dihydropyridazine-3-carboxamide

Participants

Reaction Steps

To a solution of 4-(2-fluoro-4-(methylthio)phenylamino)-1-methyl-6-oxo-N-(2-(vinyloxy)ethoxy)-1,6-dihydropyridazine-3-carboxamide (30 mg, 0.077 mmol) in EtOH/THF (2 mL/2 mL) was added 1 N aqueous HCl (0.15 mL, 0.15 mmol, 1 N aqueous solution) at room temperature. The reaction mixture was stirred for 1 hour at room temperature. The reaction mixture was neutralized to pH 7, diluted with EtOAc (3×), washed with water, dried over MgSO4, filtered, and concentrated under reduced pressure to give the crude material that was purified by silica gel flash column chromatography (100% EtOAc to 100% CH2Cl2 to 2.5 to 3 to 5% MeOH in CH2Cl2) to afford 6 mg (22%) of the desired product. MS APCI (−) m/z 367 (M−1) detected; −1H NMR (400 MHz, CD3OD) δ 7.35 (t, 1H), 7.18 (dd, 1H), 7.14 (dd, 1H), 5.92 (s, 1H), 4.06 (t, 2H), 3.79 (t, 2H), 3.74 (s, 3H), 2.51 (s, 3H).

Provenance & Evidence