反应详情

温度

5 °C

2,6-dimethoxytoluene (20.0 g) and o-fluorobenzoyl chloride (19.8 g) are dissolved in 250 ml of dichloroethane and chilled to 5° C. AlCl3 is added portiowise and when the addition is complete the reaction mixture is allowed to warm to room temperature over 30 minutes, then refluxed 30 minutes. It is then poured into 5% HCl and allowed to stand undisturbed 18 hours. Extraction with ether, followed by drying and concentration, gives crystalline material that is washed with hexane to give 2'-fluoro-2-hydroxy-4-methoxy-3-methylbenzophenone, mp 118°-120° C.

1. additionwhen the addition
2. temperatureto warm to room temperature over 30 minutes
3. temperaturerefluxed 30 minutes
4. extractionExtraction with ether
5. customby drying
6. concentrationconcentration
7. customgives crystalline material that
8. washis washed with hexane