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温度

0 °C

A solution of triphenylphosphine (98 mg, 0.37 mmol) in methylene chloride (1 mL) was cooled to 0° C. and then slowly treated with N-bromosuccinimide (67 mg, 0.37 mmol). The reaction mixture was stirred at 0° C. for 15 min and then treated with 2-(3-cyano-4-methanesulfonyl-phenyl)-3-cyclopentyl-propionic acid (prepared as in Example 75, 100 mg, 0.31mmol). The resulting reaction mixture was stirred at 0° C. for. 5 min and then allowed to warm to 25° C. where it was stirred for 30 min. The reaction mixture was then treated with 2-aminopyridine (64 mg, 0.68 mmol). The resulting reaction mixture was stirred at 25° C. for 15 h. The crude reaction mixture was then directly purified by flash chromatography (Merck Silica gel 60, 230-400 mesh, 1/1 hexanes/ethyl acetate) to afford 2-(3-cyano-4-methanesulfonyl-phenyl)-3-cyclopentyl-N-pyridin-2-yl-propionamide (94.5 mg, 76%) as a yellow foam: mp 87-90° C. (foam-to gel); EI-HRMS m/e calcd for C21H23N3O3S (M+) 397.1460, found 397.1460.

1. customThe resulting reaction mixture
2. stirringwas stirred at 0° C. for
3. custom5 min
4. temperatureto warm to 25° C. where it
5. stirringwas stirred for 30 min
6. customThe resulting reaction mixture
7. stirringwas stirred at 25° C. for 15 h
8. customThe crude reaction mixture
9. customwas then directly purified by flash chromatography (Merck Silica gel 60, 230-400 mesh, 1/1 hexanes/ethyl acetate)