反应详情

温度

-78 °C

n-Butyllithium (BuLi, 1.6 M in hexanes, 2.4 mL, 3.8 mmol) was added dropwise to a stirred solution of p-n-octyliodobenzene (1.0 g, 3.2 mmol) in dry THF (15 mL) at −78° C. under nitrogen. After stirring for 30 minutes and maintaining the temperature at −78° C., trimethylborate (0.4 g, 3.8 mmol) was added dropwise. The system was allowed to return to room temperature after 1 hour and was left stirring under nitrogen overnight. Concentrated HCl (8 mL) and water (15 mL) were then added and stirring was continued for 2 hours. The mixture was extracted with ether (15 3 mL). The ethereal phase was combined and was washed with brine and water (20 2 mL), dried with MgSO4, and the solvent removed in vacuo to give p-n-octylphenylboronic acid as a white solid (0.63 g, 84% yield).

1. waitto return to room temperature after 1 hour
2. waitwas left
3. stirringstirring under nitrogen overnight
4. stirringstirring
5. waitwas continued for 2 hours
6. extractionThe mixture was extracted with ether (15 3 mL)
7. washwas washed with brine and water (20 2 mL)
8. dry with materialdried with MgSO4
9. customthe solvent removed in vacuo