C([O:4][C:5]1[C:6]([C:11]([O:13][CH3:14])=[O:12])=[CH:7][S:8][C:9]=1[CH3:10])(=O)C.C1(C)C=CC(S(O)(=O)=O)=CC=1>CO>[OH:4][C:5]1[C:6]([C:11]([O:13][CH3:14])=[O:12])=[CH:7][S:8][C:9]=1[CH3:10]To methyl 4-acetoxy-5-methyl-3-thiophenecarboxylate (214 g) in methanol (250 ml) was added p-toluenesulphonic acid (2 g), and the solution stirred at room temperature for three days.
読み込み中…