反应详情

温度

-30 °C

1.96 g (5.10- 3 mole) oleylphenylsulfone in solution in 10cm3 tetrahydrofuran are treated by the equivalent of butyl lithium at -78° C. The temperature is then allowed to rise progressively to 20° C. During this rise in temperature, the lithiated sulfone crystallises in the medium in the form of white crystals. The reaction mixture is once more cooled to -30° C. and 0.76 g (5.10-3 mole n. pentyl bromide in solution in 5 cm3 tetrahydrofuran are added thereto. After having kept the mixture at -30° C. for 10 minutes, the temperature is allowed to rise to 20° C. and stirring is continued for 2 hours. The reaction mixture is then hydrolyzed by a saturated aqueous solution of ammonium chloride and extracted three times with 50 cm3 ether. The combined ethereal extracts are washed three times with a saturated aqueous solution of sodium chloride, dried over magnesium sulphate and concentrated. 2.14 g (yield: 93%) of 6-phenylsulfonyl-cis-tricos-14-ene identified by thin layer chromatography and spectrography are thus obtained.

1. customto rise progressively to 20° C
2. customDuring this rise in temperature, the lithiated sulfone crystallises in the medium in the form of white crystals
3. additionpentyl bromide in solution in 5 cm3 tetrahydrofuran are added
4. customat -30° C.
5. customfor 10 minutes
6. customto rise to 20° C.
7. extractionextracted three times with 50 cm3 ether
8. washThe combined ethereal extracts are washed three times with a saturated aqueous solution of sodium chloride
9. dry with materialdried over magnesium sulphate
10. concentrationconcentrated