Pyridine → 1,1-Dimethylethyl 2-(6-bromo-3-pyridinyl)-4,5,7,8-tetrahydropyrazolo[3,4-d]azepine-6(2H)-carboxylate

Beteiligte Stoffe

Reaktionsschritte

A mixture of 1,1-dimethylethyl 4,5,7,8-tetrahydropyrazolo[3,4-d]azepine-6(2H)-carboxylate (may be prepared as described in Description 9) (207 mg, 0.87 mmol), (6-bromo-3-pyridinyl)boronic acid (204 mg, 1.74 mmol), copper acetate (472 mg, 2.61 mmol), pyridine (140 μl, 1.74 mmol) and molecular sieves (4 Å, 750 mg) in dichloromethane (10 ml) was stirred open to the atmosphere for 8 days. Crude mixture was then filtered through a pad of celite and washed with dichloromethane and ammonia. After evaporation in vacuo, the residue was purified by SCX cartridge eluting with methanol first then 2M ammonia in methanol. The methanol fractions containing the product were combined and evaporated in vacuo. The residue was then purified by column chromatography on silica gel eluting with a mixture of hexane in ethyl acetate (10:1 to 1:1) to afford the title compound (D17). MS (ES+) m/e 393 and 395 [M+H]+.

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