Ethanol → 4-tert-Butylpyridine-2-carbonitrile

Temperatur

80 °C

To stirred dimethyl sulfate (6.70 g) was added slowly 4-tert-butyl-1-oxypyridine (8.0 g) at ca. 10° C. in an ice-water bath and the mixture was stirred for 3 hours at 80° C. After cooling to room temperature, to the mixture was added a mixture of ethanol and water (1:1, 60 ml) under stirring. To the mixture was added dropwise an aqueous solution of potassium cyanate (6.9 g in 20 ml of water) below 10° C. and stirring for 1 hour under the same condition, and then overnight at room temperature. To the resultant mixture was added 150 ml of water and the resultant mixture was extracted with CHCl3. The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. A crude compound was purified by column chromatography on silica gel with a mixture of ethyl acetate and n-hexane to give 4-tert-butyl-2-cyanopyridine (4.6 g) as a yellow oil.

1. temperatureAfter cooling to room temperature, to the mixture
2. additionwas added
3. stirringunder stirring
4. stirringstirring for 1 hour under the same condition
5. customovernight
6. customat room temperature
7. extractionthe resultant mixture was extracted with CHCl3
8. dry with materialThe organic layer was dried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. customA crude compound was purified by column chromatography on silica gel with a mixture of ethyl acetate and n-hexane

ORD-Eintrag

ord-8a6a0ac1b7c94595a8e5a922c7bb4184

Quelldatensatz

uspto-grants-1998_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05763437