Acetic Anhydride → HCID 59478804, compound

Participants

Reaction Steps

A solution of 714 mg of (3R,4R)-3-(2,4-dichlorophenyl)-N-{1-[6-(hydroxymethyl)pyridin-2-yl]ethyl}-2-{(1S,2S)-2-[(methylsulfonyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxamide in 14.3 ml of chloroform was cooled to 0° C., and 0.23 ml of triethylamine, 0.16 ml of acetic anhydride, and 6.8 mg of DMAP were added thereto in this order, followed by stirring at room temperature for 5 hours. The reaction solution was concentrated under reduced pressure, and ethyl acetate-water was added thereto for liquid separation, followed by washing with a saturated aqueous sodium hydrogen carbonate solution and a saturated aqueous sodium chloride solution. The solution was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure to obtain {6-[1-({[(3R,4R)-3-(2,4-dichlorophenyl)-2-{(1S,2S)-2-[(methylsulfonyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinolin-4-yl]carbonyl}amino)ethyl]pyridin-2-yl}methyl acetate.

Provenance & Evidence