[Cl:1][C:2]1[CH:3]=[C:4](B(O)O)[CH:5]=[CH:6][C:7]=1[F:8].Br[C:13]([C:15]([F:18])([F:17])[F:16])=[CH2:14].C([O-])([O-])=O.[K+].[K+]>C1COCC1.O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([C:13]([C:15]([F:18])([F:17])[F:16])=[CH2:14])[CH:5]=[CH:6][C:7]=1[F:8]A mixture of (3-chloro-4-fluorophenyl) boronic acid (300 mg, 1.72 mmol), 2-bromo-3,3,3-trifluoroprop-1-ene (331 mg, 1.89 mmol), K2CO3 (474 mg, 3.44 mmol) and Pd(PPh3)2Cl2 (25 mg, 0.035 mmol) in THF (2 mL) and H2O (1 mL) was heated at 80° C. in a sealed tube for 3 h. The mixture was cooled to rt and partitioned between EA (20 mL) and H2O (20 mL). The aqueous layer was extracted with EA (20 mL) and the combined organic layers were dried over Na2SO4. The solvent was removed under reduced pressure and the crude product was purified by column chromatography on silica gel elute with PE to give 2-chloro-1-fluoro-4-(3,3,3-trifluoroprop-1-en-2-yl)benzene (240 mg, 62.3% yield) as colorless oil.
Loading…
