Dimethyl Sulfate → 1-Methyl-3-(3-nitrophenyl)pyridinium methyl sulfate
反応式
[N+:1]([C:4]1[CH:5]=[C:6]([C:10]2[CH:11]=[N:12][CH:13]=[CH:14][CH:15]=2)[CH:7]=[CH:8][CH:9]=1)([O-:3])=[O:2].[S:16]([O:21]C)([O:19][CH3:20])(=[O:18])=[O:17]>C(OCC)C>[CH3:20][O:19][S:16]([O-:21])(=[O:18])=[O:17].[CH3:20][N+:12]1[CH:13]=[CH:14][CH:15]=[C:10]([C:6]2[CH:7]=[CH:8][CH:9]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=2)[CH:11]=1参加物
4
実験手順
3-(3-nitrophenyl)pyridine (50 g, 0.25 mol) was added portion-wise with stirring to dimethyl sulfate (125 ml). The mixture was stirred at ambient temperature for 24 hours, during which time additional dimethyl sulfate was added (2×50 ml). At the end of the reaction diethyl ether (400 ml) was added, and the mixture was stirred in the cold for 2 hours. The precipitate was filtered off and washed several times with diethyl ether. Finally, the precipitate was stirred in pyridine (100 ml) at 45° C. for 30 min. THF (250 ml) was added. Stirring was continued for additionally 30 min whereafter the product was filtered off, washed with diethyl ether and dried to yield 1-methyl-3-(3-nitrophenyl)pyridinium methyl sulfate (66.6 g, 82%).