4-(5-Nitro-benzooxazol-2-YL)-1,4-diaza-bicyclo[3.2.2]nonane → 4-(5-Amino-benzooxazol-2-YL)-1,4-diaza-bicyclo[3.2.2]nonane

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Reaction Steps

10% Palladium on carbon (300 mg) was added to a solution of 4-(5-nitro-benzooxazol-2-yl)-1,4-diaza-bicyclo[3.2.2]nonane (288 mg, 1 mmol, prepared as in Example 21) in ethanol (5 mL) and subjected to hydrogen gas at 50 PSI at RT for a period of 16 h. The reation mixture was diluted with ethanol (20 mL) and filtered through a pad of celite. Concentration in vacuo gave 209 mg of the title compound as a brown oil: 1H NMR (CD3OD, 400 MHz) δ 7.06 (d, 1H, J=8.3 Hz), 6.75 (d, 1H, J=1.3 Hz), 6.50 (dd, 1H, J=8.3, 1.3 Hz), 4.56 (br s, 1H), 4.08 (br s, 2H), 3.62-3.47 (m, 6H), 2.34-2.31 (m, 2H), 2.20-2.16 (m, 2H); MS (Cl) m/z 259.2 (M+1).

Provenance & Evidence