反应详情

In a dry three-neck flask under an atmosphere of N2 was placed 14.4 g (0.6 mole) of NaH and 100 ml of DMF. The mixture was stirred and a solution of 52.1 g (0.5 mole) of 2,2-dimethylpropandiol in 75 ml of DMF was added dropwise. Stirring was continued until the gas evolution ceased, then a solution of 91.57 g (0.6 mole) of 3-phenyl-2-propenyl chloride in 50 ml of DMF was added. The reaction mixture was stirred at room temperature for two days, then poured into 500 ml of ice and water. The aqueous solution was extracted with three 300 ml portions of ethyl ether. The organic layers were combined and washed with H2O, saturated NaCl solution, and then dried over MgSO4. The solvent was removed on a rotary evaporator to give a brick red liquid. Kugelrohr distillation gave the title compound, bp 100°-110°/0.025-0.005 mm Hg. The product was a mixture of cis and trans isomers.

1. customIn a dry three-neck flask under an atmosphere of N2 was placed
2. stirringStirring
3. stirringThe reaction mixture was stirred at room temperature for two days
4. extractionThe aqueous solution was extracted with three 300 ml portions of ethyl ether
5. washwashed with H2O, saturated NaCl solution
6. dry with materialdried over MgSO4
7. customThe solvent was removed on a rotary evaporator
8. customto give a brick red liquid
9. distillationKugelrohr distillation