2-Aminothiazole → HCID 9820651, compound

Participants

Reaction Steps

A solution of 3-cyclopentyl-2-(3,4-dichlorophenyl)-propionic acid (prepared in Example 38, 2.0 g, 6.96 mmol), benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (4.62 g, 10.44 mmol), and 2-aminothiazole (1.05 g, 10.44 mmol) in methylene chloride (50 mL) at 25° C. was treated with triethylamine (2.9 mL, 20.88 mmol). The reaction mixture was stirred for 14 h. The reaction mixture was then diluted with water (10 mL) and extracted with methylene chloride (3×10 mL). The combined organic layers were sequentially washed with water (1×10 mL), a 1 N aqueous sodium hydroxide solution (1×10 mL), a 1 N aqueous hydrochloric acid solution (1×10 mL), and a saturated aqueous sodium chloride solution (1×10 mL). The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 80/20 hexanes/ethyl acetate) afforded 3-cyclopentyl-2-(3,4-dichlorophenyl)-N-thiazol-2-yl-propionamide (2.48 g, 96%) as a white solid: mp 143.5-145.5° C.; EI-HRMS m/e calcd for C17H18Cl2N2OS (M+) 368.0516, found 368.0516.

Provenance & Evidence