反应详情

温度

100 °C

A vigorously stirred solution of 3.4 g (14 mmol) of 1-bromo-2-(2-thienyl)benzene and 3.77 g (15 mmol) of 4-methylphenyltrimethylstannane in 50 mL of dimethylformamide under a nitrogen atmosphere was treated with 427 mg of bis(triphenylphosphine) palladium(II) chloride and the resulting mixture heated at 100° C. for 4.5 hours. The reaction mixture was cooled, poured into 250 mL of water and the resultant mixture extracted with ethyl ether. The combined extracts were washed with water (4×), dried over magnesium sulfate and evaporated under vacuum. The residue was dissolved in hexane/ether (100:5) and chromatographed on silica gel, eluting with hexane/ether (100:5) to give 2.25 g of he product. 1H NMR (200 MHz, CDCl3): 2.33 (s, 3H), 6.48 (dd, 1H), 6.83 (dd, 1H), 7.08 (m, 4H), 7.16 (dd, 1H), 7.35 (m, 3H), 7.46 (dd, 1H).

1. temperatureThe reaction mixture was cooled
2. extractionthe resultant mixture extracted with ethyl ether
3. washThe combined extracts were washed with water (4×)
4. dry with materialdried over magnesium sulfate
5. customevaporated under vacuum
6. dissolutionThe residue was dissolved in hexane/ether (100:5)
7. customchromatographed on silica gel
8. washeluting with hexane/ether (100:5)
9. customto give 2.25 g of he product