2-Methyl-2-butene → 6-chloro-5-[4-[2-(methylamino)-2-oxoethoxy]phenyl]-1H-indole-3-carboxylic acid

참여 물질

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To a mixture of 2-[4-(6-chloro-3-formyl-1H-indol-5-yl)phenoxy]-N-methylacetamide (120 mg, 0.35 mmol) in acetonitrile/t-butanol (4 mL/4 mL) was added 2-methyl-2-butene (4 mL). The reaction mixture was cooled to 0° C. followed by the addition of an aqueous solution of sodium chlorite (630 mg, 7.00 mmol) and sodium phosphate (monobasic and monohydrate, 930 mg, 7.00 mmol) in water (5 mL) dropwise via additional funnel. The ice bath was removed and the reaction was stirred at room temperature overnight. The reaction was quenched with sodium sulfite. The reaction mixture was concentrated under reduced pressure and the resulting residue was purified by pre-HPLC to give the title compound (60 mg, 47% yield) as a white solid. MS (ES+) 359.0 (M+H)+. 1H NMR (400 MHz, DMSO-d6) δ 12.12 (s, 1H), 11.94-11.93 (m, 1H), 8.07 (d, 2H), 7.92 (s, 1H), 7.62 (s, 1H), 7.37 (d, 2H), 7.04 (d, 2H), 4.52 (s, 2H), 2.68 (d, 3H).

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