Potassium Carbonate → HCID 178437942, compound

Participants

Reaction Conditions

Reaction Steps

To a 10-mL sealed tube was added a solution of 4-(1-[[5-(5-ethyl-4H-1,2,4-triazol-3-yl)-4-fluoro-2-methylphenyl]carbonyl]piperidin-4-yl)benzonitrile (compound 258.2, 83.5 mg, 0.200 mmol, 1.00 equiv) in 1,4-dioxane (5 mL). Azetidine hydrochloride (93.0 mg, 0.990 mmol, 5.00 equiv) was added to the reaction in portions. Potassium carbonate (276 mg, 2.00 mmol, 10.0 equiv) was also added to the above mixture. The resulting solution was stirred overnight at 105° C. behind a blast shield, then cooled to rt. The reaction was quenched with 20 mL of water. The mixture was extracted with 30 mL of ethyl acetate and the organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The product (80 mg) was further purified by Prep-HPLC with the following conditions (1#-Pre-HPLC-001(SHIMADZU)): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, water with 50 mL NH4CO3 and CH3CN (41.0% CH3CN up to 43.0% in 8 min, up to 100.0% in 2 min, down to 41.0% in 2 min); Detector, Waters 2489 254&220 nm. The fractions containing pure compound were combined and lyophilized to yield 18.0 mg (20%) of the title compound as a white solid. m/z (ES+) 455 (M+H)+. 1H NMR (300 MHz, CD3OD): δ 7.68 (d, J=6.3 Hz, 2H), 7.48 (d, J=5.7 Hz, 2H), 7.24 & 7.13 (2 singlets, amide rotamers, Ar—H, 1H), 6.52 (s, 1H), 4.91-7.77 (m, 1H partially obscured by water peak), 3.81-3.67 (m, 1H), 3.68 (t, J=5.6 Hz, 4H), 3.32-3.18 (m, 1H), 3.05-1.91 (m, 2H), 2.84 (q, J=5.8 Hz, 2H), 2.45-2.19 (m, 5H), 2.09-1.91 (m, 1H), 1.91-1.49 (m, 3H), 1.39 (t, J=5.7 Hz, 3H).

Provenance & Evidence