| preparation | a method for preparing 2, 7-dichloro-9-fluorenone, a 9-fluorene ketone compound by oxidation, including the following steps: in a 250 three-necked flask with reflux condenser and mechanical stirring, add 20g 2, 7-dichlorofluorene (0.085mol),120 of tetrahydrofuran, 7.15G of potassium hydroxide (0.128mol) was stirred and reacted at room temperature for 2 hours. The reaction solution was filtered to remove potassium hydroxide, and the filtrate was distilled to remove the solvent, washed with water three times, and dried to obtain 2, 7-dichloro-9-fluorenone with a purity of 99.2% in a yield of 98.9. |
