反应详情

4-Bromophenol (173 g, 1 mol) was dissolved in about 500 ml of freshly distilled THF under protective gas and, after passing argon through the solution, NaH (33 g, (80% in oil), 1.1 mol) was added a little at a time. During this addition the clear solution became turbid and gray and the temperature rose by 20°. The suspension was stirred for about 1 hour at room temperature under a blanket of protective gas. Hexyl bromide (181 g; 149 ml; 1.1 mol) was placed in a dropping funnel and N2 was briefly passed through it; the hexyl bromide was then added to the reaction mixture over a period of 25 minutes while stirring. The mixture, which was still gray, was refluxed at 75° C. After 3 days, (the suspension had now become paler), the salt formed was filtered off with suction and the filtrate was admixed with 20 ml of EtOH to destroy any remaining NaH (no gas evolution). The yellowish solution was evaporated and the product was isolated from the (turbid) solution by means of fractional vacuum distillation: product: 95° C./1 mbar; 172.5 g (67%); (d˜1.17).

1. additionwas added a little at a time
2. additionDuring this addition the clear solution
3. customrose by 20°
4. stirringwhile stirring
5. temperaturewas refluxed at 75° C
6. waitAfter 3 days
7. customformed
8. filtrationwas filtered off with suction
9. customto destroy any remaining NaH (no gas evolution)
10. customThe yellowish solution was evaporated
11. customthe product was isolated from the (turbid) solution by means of fractional vacuum distillation
12. custom95° C./1 mbar