反应详情

A solution of 6 g of 4-cyanocyclohexanone in 50 ml of diethyl ether is added dropwise, while stirring, at room temperature and during the course of 1.5 hours, to a Grignard solution prepared from 13 g of 1-(4-n-pentylphenyl)-2-bromoethane and 1.3 g of magnesium turnings in 200 ml of diethyl ether. The reaction mixture is then heated under reflux to the boil for 2 hours, and, after it has cooled, 150 ml of 10% aqueous ammonium chloride solution is added to it, while stirring. The ether phase is separated off, dried over sodium sulfate and evaporated. The residual 1-(4-n-pentylphenyl)-2-(4-cyano-1-hydroxycyclohex-1-yl)-ethane is dissolved in 40 ml of acetone and this solution is heated to the boil for 1 hour with 0.5 g of p-toluenesulfonic acid. The solvent is then distilled off and the residue is taken up in 100 ml of ethanol. After the addition of 20 mg of copper (II) sulfate, 23 g of hydrazine hydrate and 40 ml of 30% aqueous hydrogen peroxide solution are added successively to the mixture at 0°. The reaction mixture is stirred for 1 hour at room temperature and poured into 500 ml of water, and the 1-(4-n-pentylphenyl)-2-(trans-4-cyanocyclohexyl)-ethane thus obtained is extracted with diethyl ether; the extracts are dried with sodium sulfate and evaporated, and the residue is recrystallized from isopropanol.

1. temperatureThe reaction mixture is then heated
2. temperatureunder reflux to the boil for 2 hours
3. temperatureafter it has cooled
4. stirringwhile stirring
5. customThe ether phase is separated off
6. dry with materialdried over sodium sulfate
7. customevaporated
8. dissolutionThe residual 1-(4-n-pentylphenyl)-2-(4-cyano-1-hydroxycyclohex-1-yl)-ethane is dissolved in 40 ml of acetone
9. temperaturethis solution is heated to the boil for 1 hour with 0.5 g of p-toluenesulfonic acid
10. distillationThe solvent is then distilled off
11. additionAfter the addition of 20 mg of copper (II) sulfate, 23 g of hydrazine hydrate and 40 ml of 30% aqueous hydrogen peroxide solution
12. additionare added successively to the mixture at 0°
13. stirringThe reaction mixture is stirred for 1 hour at room temperature
14. additionpoured into 500 ml of water