反应详情

2-Iodophenol (1.54 g, 7.00 mmol) was combined with 2-(4-isopropoxy-2-methyl-phenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (Preparation 38, 2.00 g, 7.24 mmol), cesium carbonate (4.56 g, 13.99 mmol) and palladium tetrakis(triphenylphosphine) (0.24 g, 0.21 mmol) in 1,2-dimethoxyethane (40 mL). The reaction mixture was heated to reflux for 18 hours. The reaction mixture was cooled to room temperature and then acidified with a 1 N aqueous HCl solution. The organics were extracted 3 times with diethylether. The organic layers were combined, washed with brine, dried over magnesium sulphate and concentrated in vacuo. The residue was purified by column chromatography using as eluant a mixture heptane/ethyl acetate to afford 543 mg (31% yield) of 4′-isopropoxy-2′-methylbiphenyl-2-ol as a pale yellow oil. MS m/z 243 [MH]+

1. temperatureThe reaction mixture was heated
2. temperatureto reflux for 18 hours
3. extractionThe organics were extracted 3 times with diethylether
4. washwashed with brine
5. dry with materialdried over magnesium sulphate
6. concentrationconcentrated in vacuo
7. customThe residue was purified by column chromatography