反应详情

To a solution of ethyl 4-hydroxy-9-iodo-4-methyl-4,5-dihydrobenzo[b]pyrazolo[1,5-d][1,4]oxazepine-2-carboxylate (2.3 g, 5.55 mmol, 1.00 equiv) in dichloromethane (50 mL) was added triethylsilane (9.7 g, 83.42 mmol, 15.00 equiv) and boron trifluoride diethyletherate (7.8 g, 10.00 equiv) at room temperature. After 1 h at room temperature the resulting mixture was diluted with 30 mL of dichloromethane, washed with saturated sodium bicarbonate solution, extracted with dichloromethane, dried over anhydrous sodium sulfate, and concentrated under vacuum. The residue was purified by a silica gel column with ethyl acetate/petroleum ether (1:9) to give 370 mg (17%) of the titled compound as a light yellow solid; LC-MS (ES, m/z) 399 [M+H]+.

1. washwashed with saturated sodium bicarbonate solution
2. extractionextracted with dichloromethane
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated under vacuum
5. customThe residue was purified by a silica gel column with ethyl acetate/petroleum ether (1:9)