反应详情

温度

25 °C

A solution of benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (170 mg, 0.38 mmol), 3-cyclopentyl-2-(4-trifluoromethyl-phenyl)-propionic acid (100 mg, 0.34 mmol), and 2-aminopyridine (36 mg, 0.38 mmol) in N,N-dimethylformamide (1.75 mL) was treated with N,N-diisopropylethylamine (0.12 mL, 0.73 mmol). The reaction mixture was stirred at 25° C. for 18 h. At this time, the reaction was poured into water (50 mL) and extracted with ethyl acetate (3×50 mL). The combined organic layers were washed with a 1N aqueous hydrochloric acid solution (1×50 mL), dried over sodium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 90/10 hexanes/ethyl acetate) afforded 3-cyclopentyl-N-pyridin-2-yl-2-(4-trifluoromethyl-phenyl)-propionamide (127 mg, 53.3%) as a white gum: EI-HRMS m/e calcd for C20H21F3N2O (M+) 362.1605, found 362.1592.

1. extractionextracted with ethyl acetate (3×50 mL)
2. washThe combined organic layers were washed with a 1N aqueous hydrochloric acid solution (1×50 mL)
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo