反应详情

To a mixture of N-phthalimidopyrrole (10 g, 47 mmole) and fused zinc chloride (10 g, 73 mmole) in 80 ml dichloroethane was added o-fluorobenzoyl chloride (7.5 g, 47 mmole). The reaction mixture was stirred at ambient temperature for twenty hours and at 80° for one hour. Thereafter, it was cooled, poured into water and extracted with dichloromethane. The organic extract was washed with water and with saturated sodium chloride solution, and dried over magnesium sulfate. The solution was filtered and evaporated to an oil which yielded a solid upon trituration with ethanol (yield 11 g, m.p. 180°-190°). This material was purified by column chromatography (silica gel, dichloromethane) to give 3 g solid. This material was recrystallized from isopropanol to give 2.6 g (17%) crystals, m.p. 202°-203°.

1. temperatureThereafter, it was cooled
2. extractionextracted with dichloromethane
3. extractionThe organic extract
4. washwas washed with water and with saturated sodium chloride solution
5. dry with materialdried over magnesium sulfate
6. filtrationThe solution was filtered
7. customevaporated to an oil which
8. customyielded a solid upon trituration with ethanol (yield 11 g, m.p. 180°-190°)
9. customThis material was purified by column chromatography (silica gel, dichloromethane)