Acetic Anhydride → N-(4-[(3-Acetyl-5H-pyrrolo[2,1-c][1,4]benzodiazepin-10(11H)-yl]carbonyl]phenyl]-2,4-dichlorobenzamide

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Reaction Steps

A stirred solution of 0.954 g of N-[4-(5H-pyrrolo[2,1-c][1,4]benzodiazepin-10(11H)-ylcarbonyl)-phenyl]2,4-dichlorobenzamide in 25 ml of methylene chloride and 5 ml of acetic anhydride is heated at reflux for 24 hours. The volatiles are evaporated in vacuo to a residue which is purified by column chromatography on silica gel by elution with ethyl acetate-hexane (7:3) to give 0.800 g of a white solid; mass spectrum (M+H)519.

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