Triethylamine → 1,1-Dimethylethyl 7-({2-(methyloxy)-4-[(methyloxy)carbonyl]phenyl}oxy)-1,2,4,5-tetrahydro-3H-3-benzazepine-3-carboxylate

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Reaction Steps

(3-{[(1,1-Dimethylethyl)oxy]carbonyl}-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)boronic acid (E264, Step 2) (500 mg, 1.72 mmol) was dissolved in dry dichloromethane (15 ml) and treated sequentially with methyl vanillate (313 mg, 1.72 mmol), molecular sieves (4 A, 1.0 g), copper acetate (467 mg, 2.58 mmol) and triethylamine (1.20 ml, 8.60 mmol) and the resulting mixture was stirred at room temperature for 18 hours. The mixture was diluted with dichloromethane, filtered through celite and evaporated in vacuo. The residue was dissolved in ethyl acetate and washed with saturated sodium bicarbonate solution. The organic portion was dried under magnesium sulfate and evaporated in vacuo. The resulting residue was purified by column chromatography eluting with a mixture of (0.1:9.9) to afford the title compound (240 mg). MS (ES+) m/e 328 [(M+H)—CO2tBu]+.

Provenance & Evidence