Acetic Anhydride → 2-Hydroxymethyl-3-methyl-4-(2-morpholinoethylthio)pyridine
Reaktionsgleichung
[CH3:1][C:2]1[C:7]([CH3:8])=[C:6]([S:9][CH2:10][CH2:11][N:12]2[CH2:17][CH2:16][O:15][CH2:14][CH2:13]2)[CH:5]=[CH:4][N+:3]=1[O-].C(OC(=O)C)(=[O:21])C>>[OH:21][CH2:1][C:2]1[C:7]([CH3:8])=[C:6]([S:9][CH2:10][CH2:11][N:12]2[CH2:17][CH2:16][O:15][CH2:14][CH2:13]2)[CH:5]=[CH:4][N:3]=1Komponenten
3
Reaktionsbedingungen
- Temperatur
- 90 °C
Versuchsvorschrift
2,3-Dimethyl-4-(2-morpholinoethylthio)pyridine-N-oxide (3.0 g) was dissolved in acetic anhydride (30 ml) and the mixture was stirred at 90° C. for 1.5 hours. The solvent was distilled away and water was added to the residue. The mixture was extracted with chloroform and dried over anhydrous magnesium sulfate, and the solvent was distilled away. The residual 2-acetoxymethyl-3-methyl-4-(2-morpholinoethylthio)pyridine (3.2 g) was dissolved in methanol (30 ml) and thereto was added sodium hydroxide (0.88 g) in water (10 ml) under ice-cooling. The mixture was stirred under ice-cooling for 1.5 hours and at room temperature for 2 hours. After the completion of the reaction, the methanol was distilled away and the residue was extracted with chloroform. The chloroform layer was dried over anhydrous magnesium sulfate and the solvent was distilled away to give 2.1 g of 2-hydroxymethyl-3-methyl-4-(2-morpholinoethylthio)pyridine.