[Cl:1][C:2]1[C:7]([C:8]2[CH:13]=[CH:12][C:11]([F:14])=[CH:10][CH:9]=2)=[CH:6][C:5]([OH:15])=[CH:4][CH:3]=1.[I:16]N1C(=O)CCC1=O>C(O)(=O)C.ClCCl.S(=O)(=O)(O)O>[Cl:1][C:2]1[C:7]([C:8]2[CH:13]=[CH:12][C:11]([F:14])=[CH:10][CH:9]=2)=[CH:6][C:5]([OH:15])=[C:4]([I:16])[CH:3]=1To a solution of 6-chloro-4′-fluorobiphenyl-3-ol (Preparation 104, 280 mg, 1.26 mmol) in acetic acid (2.5 mL), dichloromethane (2.5 mL) and concentrated sulfuric acid (25 μL) was added N-iodosuccinimide (272 mg, 1.21 mmol) at room temperature. The reaction mixture was stirred for 18 hours at room temperature. Dichloromethane (60 mL) was added and the organic layer was washed with brine (2×20 mL), dried over MgSO4, filtered and evaporated. The residue was purified by silica gel chromatography eluting 33% dichloromethane in heptane to afford the title compound (306 mg, 70%) as a colourless oil.
Wird geladen…
