反应详情

温度

-65 °C

7.09 ml (24.01 mmol) of Ti(OiPr)4 are added to a solution of 4-iodobenzonitrile (5.0 g, 21.83 mmol) in 140 ml of anhydrous Et2O and the reaction mixture is cooled to −65° C. To the resulting solution there are then added, dropwise, 16 ml (48.00 mmol) of a 3M solution of magnesium ethyl bromide in Et2O, and the reaction mixture is returned to ambient temperature. Stirring is continued for 1 hour at ambient temperature and 5.53 ml (43.66 mmol) of BF3.OEt2 are added. Stirring is continued for 1 hour 15 minutes at ambient temperature and 65 ml of 1N HCl are added. A two-phase suspension is obtained; 300 ml of Et2O and then 200 ml of 1N NaOH solution are added. The suspension is filtered and the filtrate is extracted twice with Et2O. The organic phases are collected, washed (water, saturated NaCl solution), dried over MgSO4 and concentrated by half. The residual solution is extracted with 1N HCl and the expected amine is precipitated as a result of making alkaline with concentrated NaOH solution.

1. additionTo the resulting solution there are then added
2. customis returned to ambient temperature
3. stirringStirring
4. waitis continued for 1 hour 15 minutes at ambient temperature
5. customA two-phase suspension is obtained
6. filtrationThe suspension is filtered
7. extractionthe filtrate is extracted twice with Et2O
8. customThe organic phases are collected
9. washwashed (water, saturated NaCl solution)
10. dry with materialdried over MgSO4
11. concentrationconcentrated by half
12. extractionThe residual solution is extracted with 1N HCl
13. customthe expected amine is precipitated as
14. customa result