Bromine → HCID 58494903, compound

Participants

Reaction Steps

To a solution of 860 mg of t-butyl 4-ethyl-3,4,6,7,9,10-hexahydro[1,4]oxazino[2,3-h][3]benzazepine-8(2H)-carboxylate in 25 ml of dichloroethane was added 1.1 g of sodium hydrogen carbonate, and further, a solution of 200 μl of bromine in 5 ml of dichloroethane was added dropwise thereto over about 30 minutes, followed by stirring at room temperature. To the reaction mixture was slowly added a 3% aqueous sodium thiosulfate solution, followed by stirring vigorously and extracting with chloroform twice. The combined organic layer was washed with saturated brine and then dried over anhydrous sodium sulfate. The solvent was evaporated and the residue was purified by silica gel chromatography (elution solvent: HEX-EtOAc) to obtain 490 mg of t-butyl 5-bromo-4-ethyl-3,4,6,7,9,10-hexahydro[1,4]oxazino[2,3-h][3]benzazepine-8(2H)-carboxylate.

Provenance & Evidence