[CH:1]([C:3]1[CH:8]=[CH:7][C:6](B(O)O)=[CH:5][CH:4]=1)=O.Br[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][N:14]=1.O1CCC[CH2:20]1.C(=O)([O-])[O-].[K+].[K+]>O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH:1]([C:3]1[CH:8]=[CH:7][C:6]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][N:14]=2)=[CH:5][CH:4]=1)=[CH2:20]
4-Formylphenylboronic acid (10.14 g, 0.0676 mol), 2-bromopyridine (12.64 g, 0.08 mol), tetrahydrofuran (100 ml), 2M potassium carbonate aqueous solution (26 ml), and palladium acetate (Pd(OAc)2, 0.04 g, 1 mol %) were placed into 250 ml of 2-necked round-bottomed flask under N2. The reaction mixture was refluxed at 90° C. for 24 hr and then poured in 200 ml of water in beaker. The reaction mixture was extracted with ether (3×150 ml) and the ether layer was then dried over magnesium sulfate (10 g) by stirring for 30 min. The dried ether layer was evaporated in vacuo to dryness and purified further by column chromatography on silica gel with eluting hexane/ethylacetate (1/5) to yield 2-(4-vinyl-phenyl)pyridine (80%).
Wird geladen…
