Hydroxyacetone → HCID 21934046, compound

Participants

Reaction Steps

A solution of 2-(3,4-difluorophenyl)-4-hydroxy-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinone (378 mg, 1 mmol), Ph3P (524 mg, 2 mmol) and acetol (74 mg, 1 mmol) in THF (25 mL) at room temperature was treated dropwise with a solution of DIAD (0.4 mL, 2 mmol) in THF (5 mL). The mixture was stirred at room temperature for 6 hours and concentrated in vacuo. The residue was chromatographed (silica gel, 1:1 hexanes-ethyl acetate) to provide the desired product (yield: 205 mg, 48%). mp 169–170° C; 1H NMR (300 MHz, DMSO-d6) δ 2.08 (s, 3H), 3.30 (s, 3H), 5.30 (s, 2H), 7.48 (m, 1H), 7.62 (q, J=10 Hz, 1H), 7.75 (m, 1H), 7.94 (d, J=9 Hz, 2H), 8.05 (d, J=9 Hz, 2H), 8.21 (s, 1H); MS (APCI+) m/z 435 (M+H)+, (APCI−) m/z 469 (M+Cl)−; Anal. calc. for C20H16F2N2O5S.0.75H2O: C, 53.62; H, 3.93; N, 6.25. Found: C, 53.26; H, 3.61; N, 6.08.

Provenance & Evidence