Boron tribromide → 4-[2-(4-Amino-furazan-3-yl)-imidazo[4,5-c]pyridin-1-yl]-phenol

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Reaction Steps

To a solution of the product of Example 30 (100 mg, 0.32 mmol) in anhydrous dichloromethane (1.0 ml) stirred at 0° C., was added dropwise a 10M solution of boron tribromide (2.91 ml, 2.92 mmol) in dichloromethane and the mixture stirred at room temperature for 16 hours. The reaction was then quenched with water (20 ml), and the pH adjusted to 14 with 50% sodium hydroxide solution. The aqueous phase was washed with dichloromethane (×3), neutralised with 5N hydrochloric acid, and the resulting precipitate collected, washed with water (×3), diethyl ether and dried in vacuo to yield the title compound (59 mg, 62%); MS (ES+) m/e 295 [M+H]+.

Provenance & Evidence