반응 #2069956

반응 방정식

Thionyl chloride

4-n-butylbenzyl alcohol

ether

sodium cyanide

Water

→

n-butylphenylacetonitrile

반응 조건

후처리

1. 1
   기타The solvent was removed under reduced pressure, and excess thionyl chloride
2. 2
   기타was removed by azeotropic distillation with benzene
3. 3
   workup.DISSOLUTIONThe residue was dissolved in dimethyl sulfoxide (50 ml)
4. 4
   workup.STIRRINGthe resulting mixture was stirred at room temperature for 16 hours
5. 5
   추출this mixture was extracted with ethyl acetate
6. 6
   세척The ethyl acetate layer was washed successively with water and saturated brine
7. 7
   건조dried over anhydrous magnesium sulfate
8. 8
   농축concentrated under reduced pressure
9. 9
   기타The residue was purified by silica gel column chromatography

실험 절차

Thionyl chloride (4.7 ml, 66 mmol) was added dropwise to a solution of 4-n-butylbenzyl alcohol (9.6 g, 59 mmol) in ether (120 ml), and this mixture was stirred at room temperature for 2 hours. The solvent was removed under reduced pressure, and excess thionyl chloride was removed by azeotropic distillation with benzene. The residue was dissolved in dimethyl sulfoxide (50 ml), sodium cyanide (86 g, 1.8 mol) and n-tetrabutylammonium iodide (2.2 g, 5.9 mmol) were added to this solution, and the resulting mixture was stirred at room temperature for 16 hours. Water was added, and this mixture was extracted with ethyl acetate. The ethyl acetate layer was washed successively with water and saturated brine, dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography to give n-butylphenylacetonitrile (8.2 g) as a yellow oil. Next, concentrated sulfuric acid (48 ml) was added dropwise to water (58 ml), this solution was cooled to 50° C., and n-Butylphenylacetonitrile (8.2 g) obtained above was added dropwise to the solution. The resulting mixture was stirred while heating under reflux for 16 hours. Upon cooling to room temperature, the precipitated crystals were collected by filtration, washed with water, and dissolved in a 0.1 N aqueous sodium hydroxide solution (200 ml). Norit (5 g) was added, and this mixture was stirred and refluxed for 2 hours. After Norit was removed by filtration through celite, the filtrate was cooled to room temperature and acidified with 1 N hydrochloric acid to precipitate crystals. The precipitated crystals were collected by filtration, washed with water, and dried to give the title compound (3.5 g).

출처