Ethanol → 10-Aminooxymethyl-2H-7-oxa-1,2-diaza-benzo[de]anthracen-3-one

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To a solution of hydroxy phthalimide (3.6 mmol) in anhydrous DMF was added sodium anhydride 60% in mineral oil (3.6 mmol). The solution was stirred for 20 minutes at room temperature. To this solution was added compound 41 (3.0 mmol). The reaction mixture was stirred at room temperature for two hours and the solvent was removed in vacuo. To the residue was added 100 mL of ethyl acetate. The organic layer was washed with water and brine, then dried over MgSO4. Ethyl acetate was removed in vacuo. A white solid was afforded in 70% yield. The white solid was added to a mixture of hydrazine and ethyl alcohol. The mixture was stirred for 2 hours under reflux. The solution was concentrated down in vacuo. To the concentrated solution was added water. A white precipitate was formed, filtered out, and washed with extra water. The white solid was collected and dried to give a white solid product 56 in 85% yield. MS (ES+): 282; Mp: 294-296° C.; 1H-NMR (DMSO-d6, 400 MHz): 12.64 (s, 1H), 8.04 (d, J=2.0 Hz, 1H), 7.92-7.86 (m, 2H), 7.73 (dd, J=7.5 and 2.0 Hz, 1H), 7.50 (dd, J=8.5 and 2.0 Hz, 1H), 7.41 (d, J=8.5 Hz, 1H), 4.64 (s, 2H); MS: (ES+): 282; Anal. Calcd. for C15H11N3O3: C, 64.05; H, 3.94; N, 14.94. Found: C, 64.24; H, 4.00; N, 14.97.

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