2-Nitro-5-(3-(pyridin-3-yl)-1,2,4-oxadiazol-5-yl)phenol → 2-amino-5-[3-(3-pyridinyl)-1,2,4-oxadiazol-5-yl]Phenol

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Reaction Steps

A solution of the product of Example 25 (284 mg, 1 mmol) in tetrahydrofuran (10 mL) was stirred with Raney®-nickel (Aldrich, 100 mg) under hydrogen at ambient temperature for 2 hours. The catalyst was then removed by filtration and the organic solution concentrated to give the title compound. 1H NMR (300 MHz, DMSO-d6) δ 5.67 (s, 2 H), 6.74 (d, J=8.1 Hz, 1 H), 7.41-7.50 (m, 2 H), 7.62 (dd, J=8.3, 4.6 Hz, 1 H), 8.39 (dt, J=8.2, 1.9, 1.7 Hz, 1 H), 8.78 (dd, J=4.7, 1.7 Hz, 1 H), 9.20 (d, J=1.7 Hz, 1 H), 9.74 (s (broad), 1 H) ppm; MS (DCI/NH3) m/z 255 (M+H)+.

Provenance & Evidence