Sodium hydride → HCID 178513452, compound

Participants

Reaction Steps

60% Sodium hydride (809 mg) was added to a DMF (30 mL) solution of formamidine hydrochloride (1.92 g), followed by stirring at room temperature for 15 minutes. A DMF (10 mL) solution of 3-[3-(3,5-difluorophenyl)-2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-oxopropanoyl]benzenesulfonyl chloride (hereinafter referred to as starting compound A, 1.13 g) was added, followed by stirring at room temperature for 1.5 hours. The reaction mixture was poured into an excess amount of aqueous ammonium chloride solution, followed by extraction with ethyl acetate. The organic layer was washed with water, concentrated under reduced pressure, purified by silica gel column chromatography (chloroform/methanol=10/1), and crystallized from diethyl ether/n-hexane to obtain 3-[3-(3,5-difluorophenyl)-2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-oxopropanoyl]-N-(iminomethyl)benzenesulfonamide (81 mg).

Provenance & Evidence