[CH2:1]([N:8]1[CH2:14][C:13]2[CH:15]=[CH:16][C:17]([F:20])=[C:18](Br)[C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH:21]1(B(O)O)[CH2:23][CH2:22]1.C(=O)([O-])[O-].[K+].[K+].O1CCOCC1>O>[CH2:1]([N:8]1[CH2:14][C:13]2[CH:15]=[CH:16][C:17]([F:20])=[C:18]([CH:21]3[CH2:23][CH2:22]3)[C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1A mixture of 4-benzyl-9-bromo-8-fluoro-2,3,4,5-tetrahydro-1,4-benzoxazepine (500 mg, 1.49 mmol), cyclopropylboronic acid (153 mg, 1.78 mmol), potassium carbonate (617 mg, 4.46 mmol), dioxane (3 ml) and water (3 ml) was deaerated with argon gas, and bis(triphenylphosphine)palladium(2) dichloride (52.2 mg, 0.0744 mmol) was added. The mixture was stirred under an argon atmosphere for 3 hr at 100° C. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with water and brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to give the desired product (408 mg, 92.1%) as an oil.
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