N-(tert-Butyl)thiourea → 4-(4-Fluorophenyl)-5-(4-methylsulfonylphenyl)-2-tert-butylaminothiazole

Participants

Reaction Steps

To a solution of 2-bromo-1-(4-fluorophenyl)-2-(4-methylsulfonylphenyl)ethanone (Example 26, Step 2) (0.406 g, 1.09 mmol) in ethanol (11 mL) in a 25 mL round bottom flask was added N-(t-butyl)thiourea (0.144 g, 1.09 mmol) and the solution heated to reflux (14 hours). The reaction was cooled to room temperature. The resulting suspension was concentrated in vacuo, suspended in methylene chloride (100 mL) and washed with NaHCO3 saturated solution (3×10 mL), sodium carbonate solution (10%, 3×20 mL), dried over sodium sulfate, filtered and concentrated. The crude product was recrystallized from methylene chloride and isooctane yielding 4-(4-fluorophenyl)-5-(4-methylsulfonylphenyl)-2-tert-butylaminothiazole (0.226 g, 51%) as a yellow crystalline plates: mp 250°-253° C.; 1HNMR (DMSO d6) 400 mHz 7.78 (d, J=8.32 Hz, 2 H), 7.70 (s, 1 H), 7.46-7.35 (m, 4 H), 7.15 (t, J=9.05 Hz, 2 H), 3.19 (s, 3 H), 1.40 (s, 9 H); MS m/z 405 (M+H). HRMS Δ=4.78 mmu.

Provenance & Evidence