反应详情

To a solution of 4,6-di-tert-butyl-3-nitrobenzene-1,2-diol (1.92 g, 7.2 mmol) in EtOH (70 mL) was added Pd-5% wt. on carbon (200 mg). The mixture was stirred under H2 (1 atm) for 2 h. The reaction was recharged with Pd-5% wt. on carbon (200 mg) and stirred under H2 (1 atm) for another 2 h. The mixture was filtered through Celite and the filtrate was concentrated and purified by column chromatography (10-40% ethyl acetate-hexanes) to give 4,6-di-tert-butyl-3-aminobenzene-1,2-diol (C-26) (560 mg, 33%). 1H NMR (400 MHz, CDCl3) δ 7.28 (s, 1H), 1.42 (s, 9H), 1.38 (s, 9H).

1. stirringstirred under H2 (1 atm) for another 2 h
2. filtrationThe mixture was filtered through Celite
3. concentrationthe filtrate was concentrated
4. custompurified by column chromatography (10-40% ethyl acetate-hexanes)