3-Bromophenol → HCID 66672888, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 3-bromophenol (11.9 g, 69.2 mmol) in dichloromethane (160.0 mL) at 0° C. was added isopropylmagnesium chloride (2.0 M in tetrahydrofuran, 38.0 mL, 76.1 mmol). The solution was stirred at 0° C. for 30 min, then 1-benzhydrylindoline-2,3-dione (10.0 g, 34.6 mmol) was added. The reaction was stirred at ambient temperature for 16 h, then concentrated in vacuo to dryness. The residue obtained was dissolved in ethyl acetate (400.0 mL) and washed with saturated ammonium chloride solution (3×100.0 mL). The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo to dryness. Purification by flash chromatography with 30% ethyl acetate in hexanes afforded 3-(4-bromo-2-hydroxyphenyl)-1-(diphenylmethyl)-3-hydroxy-1,3-dihydro-2H-indol-2-one (11.7 g, 70%) as a beige solid: 1H NMR (300 MHz, CDCl3) δ9.09 (br s, 1H), 7.47-7.16 (m, 11H), 7.12-7.00 (m, 3H), 6.92-6.84 (m, 2H), 6.72-6.66 (m, 1H), 6.51-6.45 (m, 1H), 4.57 (br s, 1H); MS (ES+) m/z 484.2 (M+1), 486.2 (M+1).

Provenance & Evidence