反应详情

To a solution of propyl N-cyano-5-hydroxy-3-pyridinecarboximidate (0.26 g) in methanol (5 ml) was added 2-(2-chlorophenyl)ethylamine (0.22 g, 1.4 mmol), and the mixture was stirred for 4 hours. After the reaction was completed, the reaction mixture was concentrated under reduced pressure and the residue obtained was extracted with chloroform (50 ml×3). The chloroform layer was washed with water (100 ml), dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (Wako Gel C-200, 30 g; eluted with chloroform:methanol=50:1) and further crystallized from diethyl ether to give the title compound (0.16 g, 0.53 mmol) as colorless crystals. (Yield starting from 3-cyano-5-hydroxypyridine 15%).

1. concentrationthe reaction mixture was concentrated under reduced pressure
2. customthe residue obtained
3. extractionwas extracted with chloroform (50 ml×3)
4. washThe chloroform layer was washed with water (100 ml)
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (Wako Gel C-200, 30 g; eluted with chloroform:methanol=50:1)
8. customfurther crystallized from diethyl ether