Sodium Carbonate → 6-(4-bromo-1-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-4-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine

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Reaction Conditions

Reaction Steps

Alternatively, to a mixture of 4-bromo-3-iodo-1-methyl-1H-pyrrolo[2,3-b]pyridine (D7) (1 g, 2.97 mmol), 4-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine (0.857 g, 3.12 mmol) in DME (18 mL) and MeOH (2.0 mL) was added bis(triphenylphosphine)palladium(II) chloride (0.208 g, 0.297 mmol) and 2M sodium carbonate aq. solution (14.84 mL, 29.7 mmol). The mixture was stirred at 60° C. for 1 hour. The mixture was cooled to RT and filtered. The solid was washed with excess ethyl acetate and the filtrate concentrated in vacuo. The residue aqueous was extracted with ethyl acetate (4×200 mL). The combined organics were dried over magnesium sulfate, filtered and concentrated. The residue was purified on normal phase chromatography eluting with a gradient of 0-30% ethyl acetate in cyclohexane to give the title compound (344 mg). LCMS (A): m/z (M+H)+ 358/360, C17H16BrN3O requires 357/359 (acidic).

Provenance & Evidence