Triphenylphosphine → HCID 21934103, compound

Participants

Reaction Steps

To a solution of 2-(3,4-difluorophenyl)-4-hydroxy-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinone (189 mg, 0.5 mmol), Ph3P (262 mg, 1 mmol) and 3-trifluoromethyl-1-butanol (66 mg, 0.5 mmol) in THF (25 mL) was added dropwise a solution of DIAD (0.2 mL, 1 mmol) in THF (5 mL) and the resulting mixture was stirred at room temperature for 8 hours. The mixture was concentrated in vacuo and the residue was chromatographed (silica gel, 1:1 hexanes-ethyl acetate) to provide the desired product, (yield: 180 mg 71%). mp 126-128° C. 1H NMR (300 MHz, DMSO-d6) δ 0.96 (d, J=7 Hz, 3H), 1.55 (m, 1H), 1.97 (m, 1H), 2.30 (m, 1H), 3.29 (s, 3H), 4.46 (m, 2H), 7.52 (m, 1H), 7.62 (m, 1H), 7.81 (m, 1H), 7.90 (d, J=9 Hz, 2H), 8.08 (d, J=9 Hz, 2H), 8.22 (s, 1H). MS (APCI+) m/z 503 (M+H)+; (APCI−) m/z 537 (M+Cl)−. Anal. calc. for C22H19F5N2O4S: C, 52.59; H, 3.81; N, 5.57. Found: C, 52.70; H, 3.73; N, 5.63.

Provenance & Evidence