Br[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH3:8].C(=O)([O-])[O-].[Na+].[Na+].[Cl:15][C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([O:22][CH3:23])[C:17]=1B(O)O>COCCOC.O.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[Cl:15][C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([O:22][CH3:23])[C:17]=1[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH3:8]To a solution of 2-bromotoluene (13.8 g, 80.6 mmol) and sodium carbonate (9.0 g, 84.9 mmol) in DME-water (5:1, 250 mL) was added 2-chloro-6-methoxybenzene boronic acid (5.0 g, 26.8 mmol) at 82° C., followed by tetrakis(triphenylphosphine)-palladium (0) (1.5 g, 1.4 mmol). The reaction mixture was heated at 82° C. overnight and cooled to room temperature. The resulting mixture was extracted with ethyl acetate, washed with water and saturated sodium chloride, dried (Na2SO4) and concentrated under reduced pressure. Purification by ISCO using a solvent gradient of 0 to 5% ethyl acetate in hexanes provided 3.9 g (62%) of 2-chloro-6-methoxy-2′-methylbiphenyl as a colorless oil.
読み込み中…
