反应详情

To a solution of 4,6-dichloro-5-(3-isopropyl-4-methoxy-phenoxy)-1-methyl-1H-indole-2-carboxylic acid methyl ester (46 mg, 0.11 mmol) in dry methylene chloride (1 mL) at room temperature was added boron tribromide (1M in methylene chloride, 0.22 mL, 0.22 mmol). After stirring at room temperature for 1.5 hours, the reaction was quenched with methanol (0.5 mL), stirred for 15 minutes, then diluted with water (10 mL), and stirred for another 15 minutes. The solution was extracted with methylene chloride (3 times 5 mL). The combined organic extracts were dried (Na2SO4), filtered, and concentrated. The residue was purified by preparative thin layer chromatography (3% methanol in methylene chloride) to afford the title compound (32 mg). 1H NMR (400 MHz, CDCl3) δ7.42 (s, 1H), 7.34 (s, 1H), 6.83 (d, 1H), 6.60 (d, 1H), 6.39-6.36 (dd, 1H), 4.05 (s, 3H), 3.92 (s, 3H), 3.19-3.12 (m, 1H), 1.21 (d, 6H). MS (APCI−) Calc: 407.1, Found: 406.2 (M−1).

1. customthe reaction was quenched with methanol (0.5 mL)
2. stirringstirred for 15 minutes
3. additiondiluted with water (10 mL)
4. stirringstirred for another 15 minutes
5. extractionThe solution was extracted with methylene chloride (3 times 5 mL)
6. dry with materialThe combined organic extracts were dried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by preparative thin layer chromatography (3% methanol in methylene chloride)