Реакция #81557

Уравнение реакции

sodium nitrite

6-amino-3,3-dimethyl-indan-1-one

→

title compound

Выход 50.3%

6-Hydroxy-3,3-dimethyl-indan-1-one

Выход 50.3%

Растворители

water

tetrafluoroboric acid

water

Условия реакции

Обработка

1. 1
   Фильтрацияthe mixture was filtered
2. 2
   Промывкаthe solids were washed with cold 5% tetrafluoroboric acid
3. 3
   Другоеdried in vacuum
4. 4
   workup.ADDITIONThe solids were then added in several portions into a boiling solution of 50 mL of sulfuric acid in 0.5 liter of water
5. 5
   ТемператураAfter refluxing for 1 hour
6. 6
   Экстракцияextracted with ethyl acetate (100 mL×3)
7. 7
   СушкаThe combined extracts were dried over magnesium sulfate
8. 8
   Другоеevaporated
9. 9
   ДругоеThe residue was purified by flash chromatography (EtOAc:hexane=1:10 to 1:2)

Методика

A solution of sodium nitrite (14.8 g, 214 mmol) in 30 mL of water was slowly added to the solution of 6-amino-3,3-dimethyl-indan-1-one (14.0 g, 85.8 mmol) in 30 mL of 48% tetrafluoroboric acid and 30 mL of water at 0°-5° C. After being stirred for 30 min, the mixture was filtered, and the solids were washed with cold 5% tetrafluoroboric acid and dried in vacuum. The solids were then added in several portions into a boiling solution of 50 mL of sulfuric acid in 0.5 liter of water. After refluxing for 1 hour, the solution was cooled to room temperature and extracted with ethyl acetate (100 mL×3). The combined extracts were dried over magnesium sulfate and evaporated. The residue was purified by flash chromatography (EtOAc:hexane=1:10 to 1:2) to give 7.60 g (50% yield) of the title compound as a solid; 1H-NMR (CDCl3) δ1.40 (s, 6H), 2.64 (s, 2H), 7.13 (s, 1H),7.18 (d, J=8.2 Hz, 1H), 7.39 (d, J=8.2 Hz, 1H); MS m/e 177 (MH+).

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