反应详情

A mixture of N1-[3-(amino(hydroxyimino)methyl)benzoyl]N2-(4-isopropylbenzoyl)-4-hydroxy-1,2-benzenediamine (209 mg, 0.48 mmol), EtOH (5 mL), H2O (2.5 mL), 1N HCl (0.5 mL, 0.5 mmol), and 10% Pd/C (217 mg) was hydrogenated at 1 atm. for 14 h. The reaction was filtered through diatomaceous earth with hot methanolic washes. The filtrate was concentrated and the residue was resubjected to the hydrogenation conditions using 10% Pd/C (189 mg). After 6 h, the reaction mixture was filtered through diatomaceous earth with hot methanolic washes. The filtrate was concentrated to give the title compound as a solid (134 mg, 62%); NMR(300 MHz, DMSO-d6): δ10.27 (s, 1H), 9.89 (s, 1H), 9.45 (s, 2H), 9.14 (s, 2H), 8.42 (s, 1H), 8.23 (d, J=7.5, 1H), 7.94 (d, J=7.2, 1H), 7.86 (d, J=8.1, 2H), 7.73 (t, J=7.8, 1H), 7.28 (m, 4H), 6.65 (d, J=8.7, 1H), 2.90 (m, 1H), 1.19 (s, 3H), 1.17 (s, 3H); MS(FD): 399.2 (M—OH).

1. filtrationThe reaction was filtered through diatomaceous earth with hot methanolic washes
2. concentrationThe filtrate was concentrated
3. waitAfter 6 h
4. filtrationthe reaction mixture was filtered through diatomaceous earth with hot methanolic washes
5. concentrationThe filtrate was concentrated