Triphenylphosphine → HCID 9805566, compound

Participants

Reaction Conditions

Reaction Steps

A solution of triphenylphosphine (236 mg, 0.9 mmol) in methylene chloride (6 mL) was cooled to 0° C. and then treated with N-bromosuccinimide (160 mg, 0.9 mmol). The reaction mixture was stirred at 0° C. for 30 min and then treated with the 2-[3-chloro-4-(5-methyl-tetrazol-1-yl)-phenyl]-3-cyclopentyl-propionic acid (prepared in Example 3, 151 mg, 0.45 mmol). The clear solution was stirred for 15 min at 0° C. and then allowed to warm to 25° C. where it was stirred for 2 h. The reaction mixture was then treated with 2-amino-5-bromopyridine (234 mg, 1.35 mmol), and the resulting suspension was stirred for 2 d at 25° C. The reaction mixture was then concentrated in vacuo to remove methylene chloride, and the residue was diluted with ethyl acetate (30 mL) and water (30 mL). The two layers were separated, and the aqueous layer was extracted with ethyl acetate (1×20 mL). The combined organic extracts were successively washed with a saturated aqueous sodium bicarbonate solution (1×50 mL) and a saturated aqueous sodium chloride solution (1×50 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 2/1 hexanes/ethyl acetate) afforded N-(5-bromo-pyridin-2-yl)-2-[3-chloro-4-(5-methyl-tetrazol-1-yl)-phenyl]-3-cyclopentyl-propionamide (90 mg, 42%) as an amorphous white solid: EI-HRMS m/e calcd for C21H22BrClN6O (M+) 489.0727, found 489.0727.

Provenance & Evidence