I([O-])(=O)(=O)=[O:2].[Na+].[CH2:7]([O:9][C:10]([C:12]1[C:21]2[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=2)[N:15]=[C:14]([C:22]2[O:23]C=CC=2)[CH:13]=1)=[O:11])[CH3:8]>ClC(Cl)(Cl)Cl.C(#N)C.O.[Ru](Cl)(Cl)Cl>[CH2:7]([O:9][C:10]([C:12]1[C:21]2[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=2)[N:15]=[C:14]([C:22]([OH:23])=[O:2])[CH:13]=1)=[O:11])[CH3:8]To a vigorously stirred of 8 g of sodium periodate and 20 mg of ruthenium trichloride in 37 ml of tetrachloro-methane, 37 ml of acteonitrile and 54 ml of water 2.5 g of 2-Furan-2-yl-quinoline-4-carboxylic acid ethyl ester was added at RT. Then, after 4 h additional 8 g of sodium periodate and 10 mg of ruthenium trichloride was added and the reaction mixture was stirred for an additional hour. Then, the reaction mixture was diluted with water and extracted with DCM (3×150 ml). The combined organic phases were dried over MgSO4 and the solvents were removed under reduced pressure. The crude product was used in the next reaction step without further purification. Yield: 2.0 g.
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