Реакция #312536

Уравнение реакции

4-bromo-2-(6-carboxyhexyl)cyclopent-2-en-1-one

tetrahydrofuran

→

4-hydroxy-2-(6-carboxyhexyl)cyclopent-2-en-1-one

Растворители

water

water

ether

Условия реакции

Обработка

1. 1
   Фильтрацияfiltered
2. 2
   Экстракцияextracted with additional ether
3. 3
   ПромывкаThe combined organic phases are washed successively with water and saturated sodium chloride solution
4. 4
   Сушкаdried over magnesium sulfate
5. 5
   Концентрированиеconcentrated

Методика

To a stirred solution of 56.0 g. of crude 4-bromo-2-(6-carboxyhexyl)cyclopent-2-en-1-one (Example 8) in 400 ml. of tetrahydrofuran and 133 ml. of water at 3° C. is added 44.1 g. (0.226 moles) of silver fluoborate during 25 minutes. The mixture is stirred at 0°-5° C. for 60 minutes, diluted with water and ether, and filtered. The aqueous portion of the filtrate is saturated with solid sodium chloride and extracted with additional ether. The combined organic phases are washed successively with water and saturated sodium chloride solution, dried over magnesium sulfate, and concentrated. Column chromatography of the residue gives the subject compound as a mixture with 4-hydroxy-2-(6-carboxyhexyl)cyclopent-2-en-1-one, NMR(CDCl3) 3.60 (multiplet, O-methylene hydrogens) and 4.60 (multiplet, O-methine hydrogen).

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