反应 #80464

反应方程式

I2

LDA

3-(4-fluorophenylmethyl)thiophene

→

2-iodo-4-(4-fluorophenylmethyl)thiophene

收率 87.6%

溶剂

THF

THF

反应条件

后处理

1. 1
   其他the cold bath was removed
2. 2
   其他quenched with saturated aqueous NH4Cl
3. 3
   萃取extracted with ether
4. 4
   洗涤The organic phase was washed with 1N aqueous H3PO4, saturated aqueous NaHCO3, saturated aqueous Na2S2O3, and brine
5. 5
   干燥dried over MgSO4
6. 6
   过滤filtered
7. 7
   浓缩concentrated in vacuo

实验过程

To a solution of LDA (3.67 mmol) in THF at -78° C. was added a solution of 3-(4-fluorophenylmethyl)thiophene (640 mg, 3.33 mmol), prepared as in Example 35, step 1, and the reaction mixture was stirred for 25 min. A solution of I2 (1.01 g, 4.00 mmol) in THF was added and the cold bath was removed. The reaction mixture was warmed to ambient temperature, quenched with saturated aqueous NH4Cl, and extracted with ether. The organic phase was washed with 1N aqueous H3PO4, saturated aqueous NaHCO3, saturated aqueous Na2S2O3, and brine, dried over MgSO4, filtered, and concentrated in vacuo to give 928 mg of 2-iodo-4-(4-fluorophenylmethyl)thiophene which was used without further purification.

来源