反应详情

The title B compound, 2-(4-fluorobenzenesulfonyl)benzene-1,4-diol (1.2 g, 4.48 mmol) is added to a suspension of NaH (60% dispersion in mineral oil; 0.39 g, 9.86 mmol) in 15 mL of NMP at 0° C. in one portion. The mixture is warmed to RT and after 30 min, 4-chloro-3,5-dimethylnitrobenzene (1 g, 5.38 mmol) is added and the reaction is heated at 120° C. for 1 h. The reaction is cooled to RT and quenched with aqueous 1N HCl. The mixture is partitioned between water and EtOAc, and the organic solution is washed with water and brine, dried over anhydrous Na2SO4 and concentrated. Chromatography on silica (eluant; EtOAc/hexane-1/2/1/1) affords 4-(2,6-dimethyl-4-nitrophenoxy)-2-(4-fluorobenzenesulfonyl)phenol: NMR (CDCl3) 2.11 (s, 6H), 6.85-6.96 (m, 3H), 7.00 (app t, 2H, J=9), 7.88 (dd, 2H, J=9, 5),7.98 (s,2H), 8.73 (s, 1H).

1. temperaturethe reaction is heated at 120° C. for 1 h
2. temperatureThe reaction is cooled to RT
3. customquenched with aqueous 1N HCl
4. customThe mixture is partitioned between water and EtOAc
5. washthe organic solution is washed with water and brine
6. dry with materialdried over anhydrous Na2SO4
7. concentrationconcentrated