反应详情

The 7-benzyl-3-phenyl-2-(trimethylsilyl)furo[2,3-b]pyridin-4(7H)-one 4d was taken up in N,N-dimethylformamide (50 mL), and N-Iodosuccinimide (15.704 g, 69.95 mmol) was added. The mixture stirred at room temperature for 1.5 h and was then concentrated. The residue was partitioned between dichloromethane and an aqueous solution of sodium thiosulfate. The aqueous phase was separated and extracted with dichloromethane. The combined organic phases were washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated to afford an orange brown oil. Purification via column chromatography on silica gel (eluting with ethyl acetate) afforded 7-benzyl-2-iodo-3-phenylfuro[2,3-b]pyridin-4(7H)-one 4f as a brown solid. MS (MH+) 428.0; Calculated 427 for C20H14INO2.

1. concentrationwas then concentrated
2. customThe residue was partitioned between dichloromethane
3. customThe aqueous phase was separated
4. extractionextracted with dichloromethane
5. washThe combined organic phases were washed with brine
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated
9. customto afford an orange brown oil
10. customPurification via column chromatography on silica gel (eluting with ethyl acetate)