反应详情

4-Bromobenzonitrile (2.5 mmol), phenol (3.5 or 5.0 mmol), Cs2CO3 (3.5 or 5.0 mmol), (CuOTf)2 PhH (0.0625 mmol, 5.0 mol % Cu), ethyl acetate (0.125 mmol, 5.0 mol %), 1-naphthoic acid (3.5 mmol), molecular sieves (625 mg) and toluene (1.5 mL) were added to an oven-dried test tube which was then sealed with a septum, purged with argon, and heated to 110 C. under argon until the aryl halide was consumed as determined by GC analysis. Upon cooling at room temperature, dichloromethane was added and the solvent was removed by filtration. The remaining molecular sieves were stirred with another portion of dichloromethane for 1 h at room temperature, and the solvent was removed by filtration. The combined organic phases were washed with 5% aqueous NaOH. The aqueous layer was then extracted three times with dichloromethane and the combined organic layers were washed with brine. The organic layer was dried over Mg2SO4 and concentrated under vacuum to give the crude product. Purification by flash column chromatography (3% EtOAc/hexane) gave the analytically pure product as a clear oil (405 mg, 86% yield). 1H NMR (300 MHz, CDCl3) δ 7.57 (d, J=8.7 Hz, 2 H), 7.40 (t, J=7.9 Hz, 2 H), 7.22 (t, J=7.6 Hz, 1 H), 7.05 (d, J=7.9 Hz, 2 H), 6.98 (d, J=8.8 Hz, 2 H); 13C NMR (75 MHz, CDCl3) δ 154.6, 133.9, 130.0, 124.9, 120.2, 118.6, 117.7, 105.6; IR (neat): 3068, 2226, 1586, 1483, 1245, 1165 cm−1.

1. customwas then sealed with a septum
2. custompurged with argon
3. temperatureheated to 110 C
4. customunder argon until the aryl halide was consumed
5. additiondichloromethane was added
6. customthe solvent was removed by filtration
7. customthe solvent was removed by filtration
8. washThe combined organic phases were washed with 5% aqueous NaOH
9. extractionThe aqueous layer was then extracted three times with dichloromethane
10. washthe combined organic layers were washed with brine
11. dry with materialThe organic layer was dried over Mg2SO4
12. concentrationconcentrated under vacuum
13. customto give the crude product
14. customPurification by flash column chromatography (3% EtOAc/hexane)