Toluene → HCID 86698788, compound

Participants

Reaction Steps

A mixture of methyl 6-Chloro-5-(5,5-dimethyl-[1,3,2]dioxaborinan-2-yl)-1H-indole-3-carboxylate (241 mg, 0.75 mmol), 3-Benzyloxymethyl-3-(4-bromo-phenyl)-oxetane (250 mg, 0.75 mmol), 2M aqueous potassium carbonate (1.51 mL, 3 mmol), toluene (9 mL), and ethanol (3 mL) was sparged with N2 for 10 minutes, then treated with [1,1′bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane adduct (29 mg, 0.035 mmol). The reaction mixture was heated to 100 degrees and stirred. After 2 hours the reaction was cooled to room temperature, diluted with ethyl acetate, washed with water and saturated brine, dried over magnesium sulfate, filtered and concentrated in vacuo to afford a brown oil, which was purified by flash chromatography (40 g silica, 10-60% ethyl acetate/heptane, 17 column volumes). Product fractions were combined and concentrated in vacuo to afford the title compound as a colorless solid (215 mg, 62% yield). MS (ES+) 462 (M+H)+; 1H NMR (500 MHz, CD3OD) δ ppm 8.04 (s, 1 H), 8.02 (s, 1 H), 7.99 (s, 1 H), 7.43-7.57 (m, 4 H), 7.23-7.34 (m, 5 H), 4.90-5.01 (m, 4 H), 4.58 (s, 2 H), 3.90 (s, 3 H), 3.88 (s, 2 H).

Provenance & Evidence