反应详情

Phosphorous oxychloride (1.9 ml) was added to a solution of 2,3-dihydroxynaphthalene (3.2 g) in DMF (26 ml) at 0° C. The reaction mixture was kept for four hours at 100° C. Water (50 ml) was added to the cooled mixture and the resulting oily suspension refluxed for 20 min. The cool reaction mixture was poured into ice, filtered, washed with water and recrystallized from 2-propanol-water. Yield: 0.1 g, melting point 129-134° C.

1. temperaturethe resulting oily suspension refluxed for 20 min
2. customThe cool reaction mixture
3. additionwas poured into ice
4. filtrationfiltered
5. washwashed with water
6. customrecrystallized from 2-propanol-water