Cl[C:2]1[CH:6]=[C:5]([Cl:7])[S:4][C:3]=1[CH:8]=[O:9].[Na+].[N:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[S:17]([O-:19])=[O:18]>>[Cl:7][C:5]1[S:4][C:3]([CH:8]=[O:9])=[C:2]([S:17]([C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][N:11]=2)(=[O:19])=[O:18])[CH:6]=1The title compound was prepared by the method of Preparation 42a using 3,5-dichlorothiophene-2-carbaldehyde and pyridine-2-sulfinate sodium salt.
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