Dichloromethane → 5-{4-[6,7-Bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}-3-nitropyridin-2-amine

Participants

Reaction Conditions

Reaction Steps

A mixture of commercially available 3-nitro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine (125 mg, 0.47 mmol), 4-[6,7-bis(methyloxy)quinolin-4-yl]-7-bromo-2,3,4,5-tetrahydro-1,4-benzoxazepine (155 mg, 0.47 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane (34 mg, 0.05 mmol), cesium carbonate (300 mg, 2.4 mmol) in 1,4-dioxane (20 mL) and water (2 mL) was degassed with nitrogen for 5 minutes and then stirred at 93° C. for 18 hours. The reaction mixture was cooled to room temperature, diluted with ethyl acetate (80 mL) then filtered through a celite bed. The filtrate was washed with brine (2×50 mL), dried over sodium sulfate, filtered and concentrated. The residue was purified by silica gel flash chromatography (0 to 10% methanol-dichloromethane) to give 5-{4-[6,7-bis(methyloxy)quinolin-4-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl}-3-nitropyridin-2-amine (135 mg, 76% yield); MS (EI) for C25H23N5O5: 474 (MH+).

Provenance & Evidence