Boron Trichloride → HCID 86698789, compound

Participants

Reaction Steps

To a 0° C. slurry of methyl 5-[4-(3-Benzyloxymethyl-oxetan-3-yl)-phenyl]-6-chloro-1H-indole-3-carboxylate (200 mg, 0.433 mmol) in DCM (5 mL) was added boron trichloride (1.73 mL, 1.0M in DCM, 1.73 mmol) via syringe, and the mixture was allowed to warm to room temperature over five hours. The reaction mixture was concentrated to dryness, diluted with ethyl acetate (200 mL), washed with water (10 mL) and saturated brine (10 mL), dried over magnesium sulfate, filtered and concentrated in vacuo to afford an orange film, which was purified by flash chromatography (12 g silica, 20-100% ethyl acetate/heptane, 38 column volumes). Product fractions were combined and concentrated in vacuo to afford the title compound as a colorless oil (40 mg, 25% yield). MS (ES+) 372 (M+H)+; 1H NMR (500 MHz, CD3OD) δ ppm 8.00-8.04 (m, 2H), 7.60 (s, 1H), 7.44-7.55 (m, 4H), 4.10 (s, 2H), 3.95-4.07 (m, 4H), 3.88 (s, 3H).

Provenance & Evidence