Реакция #710525

Уравнение реакции

Allyl bromide

pyrocatechol

Compound A

pyrocatechol

K2CO3

acetone

→

3,4-diallylbenzene-1,2-diol

Условия реакции

Обработка

1. 1
   workup.WAITThe stirring was continued for another hour
2. 2
   Температураthe mixture was refluxed for 5 hours
3. 3
   ДругоеAfter completion of the reaction
4. 4
   Фильтрацияthe solid was filtered
5. 5
   Концентрированиеfiltrate was concentrated
6. 6
   Экстракцияextracted with chloroform (3×50 mL)
7. 7
   Промывкаwashed with brine (1×50 mL)
8. 8
   Сушкаdried over anhydrous sodium sulfate and solvent
9. 9
   Другоеwas removed under reduced pressure
10. 10
    ДругоеThe reaction mixture was purified by column chromatography (silica gel: 60-120 mesh)
11. 11
    Температураwith increasing concentration of chloroform
12. 12
    ПромывкаElution of 60% and 75% chloroform in petroleum ether yielded pure compounds corresponding to Compound No

Методика

To a solution of pyrocatechol (Compound A) (1 g, 0.009 mol) and dry acetone (10 mL) was added dry K2CO3 (2.646 g, 0.0189 mol) in portions for 30 minutes. The stirring was continued for another hour. Allyl bromide (1.6 mL, 0.0189 mol) was added to the mixture for 30 minutes and the mixture was refluxed for 5 hours. After completion of the reaction, the solid was filtered and filtrate was concentrated and extracted with chloroform (3×50 mL), washed with brine (1×50 mL), dried over anhydrous sodium sulfate and solvent was removed under reduced pressure. The crude material was heated at 175-180° C. for 2 hours. The reaction mixture was purified by column chromatography (silica gel: 60-120 mesh) using petroleum ether with increasing concentration of chloroform. Elution of 60% and 75% chloroform in petroleum ether yielded pure compounds corresponding to Compound No. 2 and Compound No. 3 as liquids respectively.

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