Pyridine → 2-(3-chloro-4-methanesulfonyl-phenyl)-N-pyrazin-2-yl-3-(tetrahydro-furan-3-yl)-propionamide

Participants

Reaction Conditions

Reaction Steps

A solution of triphenylphosphine (118 mg, 0.45 mmol) in methylene chloride (5 mL) cooled to 0° C. was treated with N-bromosuccinimide (91 mg, 0.51 mmol). Upon complete dissolution, the cooled, purple solution was then treated with 2-(3-chloro-4-methanesulfonyl-phenyl)-3-(tetrahydro-furan-3-yl)-propionic acid (100 mg, 0.30 mmol). The resulting reaction mixture was stirred at 0° C. for 20 min then warmed to 25° C., where it was stirred for another 30 min. The purple reaction mixture was then treated with 2-aminopyrazine (43 mg, 0.45 mmol) and pyridine (0.07 mL, 0.90 mmol) and stirred for 16 h at 25° C. The reaction was then diluted with water (10 mL) and extracted with methylene chloride 3×15 mL). The organics were dried over sodium sulfate, filtered, and concentrated in vacuo. Biotage chromatography (FLASH 12M, Silica, 1.5/98.5 methylene chloride/methanol) afforded 2-(3-chloro-4-methanesulfonyl-phenyl)-N-pyrazin-2-yl-3-(tetrahydro-furan-3-yl)-propionamide (46 mg, 37%) as a light orange foam: (ES)+-HRMS m/e calcd for C18H20ClN3O4S (M+H)+ 410.0936. found 410.0940.

Provenance & Evidence