Cl.[CH:2]1[C:15]2[C:6](=[N:7][C:8]3[C:13]([C:14]=2NNS(C2C=C[C:24]([CH3:27])=CC=2)(=O)=O)=[CH:12][CH:11]=[CH:10][CH:9]=3)[CH:5]=[CH:4][CH:3]=1.[OH-:28].[Na+].[CH2:30]([OH:33])[CH2:31][OH:32]>O>[CH3:31][O:32][C:5]1[C:6]2[C:15](=[CH:14][C:13]3[C:8]([N:7]=2)=[CH:9][CH:10]=[CH:11][CH:12]=3)[CH:2]=[CH:3][CH:4]=1.[CH3:14][CH2:15][CH2:2][CH2:3][CH2:4][CH3:5].[C:30]([O:33][CH2:24][CH3:27])(=[O:28])[CH3:31]A mixed solution comprising 124 mg of N1 -9-(4-methoxy)acridinyl-N2 -p-toluenesulfonylhydrazine hydrochloride (18), 40 mg of sodium hydroxide, and 5 ml of ethylene glycol was allowed to react at 100° C. for a period of one hour. After the completion of the reaction, the reacted solution was introduced into water and the product was extracted by ethyl acetate. After ethyl acetate was distilled away, the residue was purified by column chromatography and 57.6 mg of 4-methoxyacridine (19) was obtained as crystals on recrystallization by hexane-ethyl acetate (yield 95.2%).
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