反応 #6687

反応方程式

triisopropylborate

1,2-difluoro-3-(4-pentyloxybutoxy)-benzene

1,2-Difluoro-3-(4-pentyloxybutoxy)benzene

butyllithium

→

2,3-difluoro-4-(4-pentyloxybutoxy)phenylboronic acid

2,3-Difluoro-4-(4-pentyloxybutoxy)phenylboronic acid

溶媒

THF

反応条件

後処理

1. 1
   workup.STIRRINGThe reaction mixture was stirred at that temperature for 1 h and at room temperature for 10 h
2. 2
   その他quenched with water
3. 3
   抽出extracted with ethyl acetate
4. 4
   洗浄washed with brine
5. 5
   乾燥dried over MgSO4
6. 6
   濃縮concentrated in vacuo
7. 7
   その他Purification
8. 8
   その他by recrystallization from hexane

実験手順

To a solution of 1,2-difluoro-3-(4-pentyloxybutoxy)-benzene (24), (1 equi.) in THF (5 mL/mmole), butyllithium (1.3 equi.) was added at −78° C. The reaction mixture was stirred at that temperature for 2 h,. Then triisopropylborate (1 equi.) was added at that temperature. The reaction mixture was stirred at that temperature for 1 h and at room temperature for 10 h, quenched with water, extracted with ethyl acetate, washed with brine, dried over MgSO4, and concentrated in vacuo. Purification by recrystallization from hexane gave 2,3-difluoro-4-(4-pentyloxybutoxy)phenylboronic acid (25), as a white solid (75%).

出典