反应详情

温度

25 °C

A solution of 3-cyclopentyl-2-(4-methanesulfonyl-3-trifluoromethyl-phenyl)-propionic acid (prepared as in Example 30, 182 mg, 0.50 mmol), benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (332 mg, 0.75 mmol), and 2-aminobenzothiazole (113 mg, 0.75 mmol) in methylene chloride (10 mL) at 25° C. was treated with triethylamine (0.21 mL, 1.50 mmol). The reaction mixture was stirred at 25° C. for 48 h. The reaction mixture was then diluted with methylene chloride (25 mL) and washed with a 3N aqueous hydrochloric acid solution (1×25 mL), water (1×25 mL), and a saturated aqueous sodium chloride solution (3×25 mL). The organic layer was dried over magnesium sulfate and sodium sulfate, filtered, and concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 70/30 hexanes/ethyl acetate) afforded N-benzothiazol-2-yl-3-cyclopentyl-2-(4-methanesulfonyl-3-trifluoromethyl-phenyl)-propionamide (205 mg, 82.6%) as a white solid: mp 105-110° C.; EI-HRMS m/e calcd for C23H23F3N2O3S2 (M+) 496.1102, found 496.1102.

1. washwashed with a 3N aqueous hydrochloric acid solution (1×25 mL), water (1×25 mL)
2. dry with materialThe organic layer was dried over magnesium sulfate and sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo