Реакция #5352

Уравнение реакции

potassium carbonate

water

azelaic acid monomethyl ester

→

8-carbomethoxyoctan-1-ol

Растворители

tetrahydrofuran

diethyl ether

Условия реакции

Обработка

1. 1
   workup.ADDITIONadded at such a rate as
2. 2
   Другоеthe organic layer is separated
3. 3
   ЭкстракцияThe aqueous layer is extracted three times with diethyl ether
4. 4
   ПромывкаThe combined extracts are washed with brine
5. 5
   Сушкаdried over Na2SO4
6. 6
   Фильтрацияfiltered
7. 7
   Концентрированиеconcentrated in vacuo

Методика

To a solution of 165 mL (165 mmol) of a 1.0M solution of boranetetrahydrofuran complex in tetrahydrofuran in 200 mL of dry diethyl ether at 0° C. is added dropwise 25.0 g (123 mmol) of azelaic acid monomethyl ester, added at such a rate as to prevent excessive release of gas and exothermicity. The solution is allowed to warm to room temperature overnight and is worked up by slowly adding water until gas evolution ceases. Then solid potassium carbonate is added and the organic layer is separated. The aqueous layer is extracted three times with diethyl ether. The combined extracts are washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo to give 8-carbomethoxyoctan-1-ol as a colorless oil.

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