Potassium Carbonate → methyl 4-((1E,4E)-2-amino-4-(dipropylcarbamoyl)-3H-benzo[b]azepin-8-yl)benzoate

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(1E,4E)-2-amino-8-bromo-N,N-dipropyl-3H-benzo[b]azepine-4-carboxamide (75.0 mgs, 0.206 mmol), 4-(methoxycarbonyl)phenylboronic acid (55.6 mgs, 0.309 mmol, tetrakis(triphenylphosphine)palladium(0) (23.8 mgs, 0.021 mmol), 2M aqueous potassium carbonate (0.309 ml, 0.618 mmol) were combined in 2 mls of acetonitrile in a microwave reaction vial. This mixture was heated in a microwave to 100° C. for 30 minutes. The mixture was then diluted with EtOAc, washed twice with brine, dried over sodium sulfate, and concentrated under reduced pressure. Preparative thin layer chromatography (2×0.5 mm plates, 7% MeOH/DCM) afforded 20 mgs (23%) of methyl 4-((1E,4E)-2-amino-4-(dipropylcarbamoyl)-3H-benzo[b]azepin-8-yl)benzoate. 1H NMR (400 MHz, CDCl3) δ 8.08-8.13 (m, 2H), 7.68-7.74 (m, 2H), 7.52-7.56 (m, 1H), 7.33-7.39 (m, 2H), 6.84 (s, 1H), 3.94 (s, 3H), 3.60-3.68 (m, 2H), 3.37-3.51 (m, 4H), 2.86 (s, 2H), 1.60-1.72 (m, 4H), 0.88-0.98 (m, 6H); m/z (APCI-pos) M+1=420.2.

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