Реакция #885

Уравнение реакции

9,9-bis(4-hydroxyphenyl)fluorene

ethylene carbonate

potassium carbonate

18-crown-6

→

white powder

4-(2-hydroxyethoxyphenyl)fluorene

Растворители

Условия реакции

Обработка

1. 1
   Температураat reflux
2. 2
   Другоеthe solvent was decanted from the precipitated product
3. 3
   ПромывкаThe resulting white solid was washed with ligroin (
4. 4
   Другоеdried under a stream of nitrogen
5. 5
   ДругоеThe product was recrystallized from methanol

Методика

A mixture of 84.4 g (0.241 mol) of 9,9-bis(4-hydroxyphenyl)fluorene, 46.7 g (0.53 mol) of ethylene carbonate, 3.3 g (0.024 mol) of potassium carbonate, and a catalytic amount of 18-crown-6 in 400 mL of xylenes was heated at reflux with mechanical stirring for 6 h. The mixture was allowed to cool slowly to room temperature, and the solvent was decanted from the precipitated product. The resulting white solid was washed with ligroin (to prevent the formation of a gummy mass), and dried under a stream of nitrogen. The product was recrystallized from methanol, providing 70.4 g (67%) of a white powder.

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