反应详情

5-iodo-2-methoxy-4,6-dimethyl-nicotinonitrile (1.6 g, 5.554 mmol), Pd(PPh3)4 (642 mg, 0.555 mmol), phenyl boronic acid (1.05 g, 8.331 mmol), and anhydrous potassium carbonate (1.54 g, 11.11 mmol) were suspended in the mixed solution of 60 mL of anhydrous toluene and 3 mL of anhydrous ethanol, and then heated to reflux for about 72 hours under the nitrogen atmosphere. The mixture was filtered, added with 100 mL of a saturated solution of ammonium chloride and then extracted twice with 100 mL of methylene chloride. The resulting organic layer was dried with anhydrous sodium sulfate, and then concentrated. A silica gel column chromatography (5% EtOAc/Hexanes) was performed on the resulting residue and 1.04 g (78%) of 2-methoxy-4,6-dimethyl-5-phenyl-nicotinonitrile was obtained in pale yellow solid.

1. temperatureheated
2. temperatureto reflux for about 72 hours under the nitrogen atmosphere
3. filtrationThe mixture was filtered
4. additionadded with 100 mL of a saturated solution of ammonium chloride
5. extractionextracted twice with 100 mL of methylene chloride
6. dry with materialThe resulting organic layer was dried with anhydrous sodium sulfate
7. concentrationconcentrated