反应详情

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).

1. additionwas added
2. stirringby stirring at room temperature for 1.5 hours
3. extractionfollowed by extraction with ethyl acetate
4. washThe organic layer was washed with water
5. concentrationconcentrated under reduced pressure
6. custompurified by silica gel column chromatography (chloroform/methanol=10/1)
7. customcrystallized from diethyl ether/n-hexane