Acetyl chloride → HCID 20562331, compound

Participants

Reaction Steps

11.1 g (0.03 M) of 1-[5-(o-fluorophenyl)-2,3-dihydro-1-methyl-2-oxo-1H-1,4-benzodiazepin-7-yl]-3-(2-hydroxyethyl)urea are stirred at room temperature for 18 hours in 150 ml of acetonitrile with 3.9 ml of acetyl chloride and 9 g of powdered potassium carbonate. The mixture is concentrated on a rotary evaporator and the residue is purified on a 500 g silica gel column using methylene chloride/ethanol as the eluting agent. After crystallisation from ethyl acetate, there is obtained 2-[3-[5-(o-fluorophenyl)-2,3-dihydro-1-methyl-2-oxo-1H-1,4-benzodiazepin-7-yl]ureido]ethyl acetate which melts at 196°-198° C.

Provenance & Evidence