反应详情

0.2 g of bis(triphenylphosphine)palladium dichloride and 4 g of ammonium formate were added to a solution of 6.2 g of allyl cis-4-(4-hydroxy-3-methoxycinnamoyloxy)-1-methyl-1-cyclohexanecarboxylate (Example 10) in 80 ml of THF. The solution was reacted for 20 hours under an argon stream, while it was refluxed. After reaction, 150 ml of an aqueous sodium chloride solution was added to the reaction solution. The solution was extracted three times with 70 ml of ethyl acetate. The organic layer obtained was washed three times with an aqueous sodium chloride solution and dried over magnesium sulfate. Then, the solvent was removed in vacuo. The oily substance obtained was subjected to column chromatography using 50 g of silica gel. From the fraction eluted with hexane and ethyl acetate=1:2, the solvent was removed in vacuo, yielding 0.8 g of cis-4-(4-hydroxy-3-methoxy-cinnamoyloxy)-1-methyl-1-cyclohexanecarboxylic acid (a compound of the present invention) as a pale yellow oil, which had the following physiochemical properties:

1. customThe solution was reacted for 20 hours under an argon stream
2. temperaturewhile it was refluxed
3. additionwas added to the reaction solution
4. extractionThe solution was extracted three times with 70 ml of ethyl acetate
5. customThe organic layer obtained
6. washwas washed three times with an aqueous sodium chloride solution
7. dry with materialdried over magnesium sulfate
8. customThen, the solvent was removed in vacuo
9. customThe oily substance obtained
10. washFrom the fraction eluted with hexane and ethyl acetate=1:2
11. customthe solvent was removed in vacuo