反应详情

A solution of 2-(3-cyano-4-methanesulfonyl-phenyl)-3-cyclopentyl-propionic acid (prepared as in Example 26, 100 mg, 0.311 mmol), triethylamine (0.13 mL, 0.933 mmol), benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (206 mg, 0.467 mmol), and 2-aminobenzimidazole (62 mg, 0.467 mmol) in methylene chloride (3 mL) was stirred at 25° C. for 3 h. The crude reaction mixture was directly purified by Biotage chromatography (FLASH 40S, Silica, 1/3 hexanes/ethyl acetate) to afford N-(1H-benzimidazol-2-yl)-2-(3-cyano-4-methanesulfonyl-phenyl)-3-cyclopentyl-propionamide (129 mg, 95%) as a yellow solid: mp 148-152° C.; EI-HRMS m/e calcd for C23H24N4O3S (M+) 436.1569, found 436.1573.

1. customThe crude reaction mixture
2. customwas directly purified by Biotage chromatography (FLASH 40S, Silica, 1/3 hexanes/ethyl acetate)