反应详情

A solution of the product from Example 34 (50 mg) in dichloromethane (2 ml) and thionyl chloride (0.1 ml) was heated under reflux for 1 h, then evaporated to dryness under reduced pressure. The residue was dissolved in ethanol, 10% palladium-on-carbon catalyst was added, and the mixture was shaken in an atomosphere of hydrogen at room temperature and atmospheric pressure for 1 h. The mixture was filtered, the filtrate was evaporated to dryness under reduced pressure, and the residue was partitioned between aqueous sodium hydrogen carbonate solution and ethyl acetate. The ethyl acetate phase was separated, dried and evaporated to dryness under reduced pressure, and the residue was purified by flash column chromatography, eluting with ethyl acetate, to give 2,2'-[5-(3-pyridylmethyl)-1,3-phenylene]di(2-methylpropiononitrile), mp 82°-84°.

1. temperatureunder reflux for 1 h
2. customevaporated to dryness under reduced pressure
3. dissolutionThe residue was dissolved in ethanol
4. addition10% palladium-on-carbon catalyst was added
5. filtrationThe mixture was filtered
6. customthe filtrate was evaporated to dryness under reduced pressure
7. customthe residue was partitioned between aqueous sodium hydrogen carbonate solution and ethyl acetate
8. customThe ethyl acetate phase was separated
9. customdried
10. customevaporated to dryness under reduced pressure
11. customthe residue was purified by flash column chromatography
12. washeluting with ethyl acetate