反应 #803350

反应方程式

5-methyl-3-(pyridin-2-ylsulfanyl)oxolane-2-one

diisobutylaluminum hydride toluene

methanol

potassium sodium tartrate

→

5-methyl-3-(pyridin-2-ylsulfanyl)oxolan-2-ol

收率 64.5%

溶剂

tetrahydrofuran

反应条件

后处理

1. 1
   workup.ADDITIONwas then added to the mixture at room temperature
2. 2
   workup.STIRRINGThe thus obtained mixture was stirred for 30 minutes
3. 3
   其他the water layer was then removed
4. 4
   萃取The water layer was extracted with 100 mL of ethyl acetate
5. 5
   洗涤the obtained mixture was then washed with a saturated sodium chloride aqueous solution
6. 6
   干燥was then dried over anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONAfter that, the solvent was distilled away under reduced pressure
8. 8
   其他The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1)

实验过程

16.4 mL of a 1.5 mol/L diisobutylaluminum hydride/toluene solution was added dropwise to a solution of 4.3 g of 5-methyl-3-(pyridin-2-ylsulfanyl)oxolane-2-one in 100 mL of tetrahydrofuran at −78° C., and the obtained mixture was then stirred for 7.5 hours. Thereafter, 15 mL of methanol was added to the reaction mixture, and 100 mL of a saturated potassium sodium tartrate aqueous solution was then added to the mixture at room temperature. The thus obtained mixture was stirred for 30 minutes, and the water layer was then removed. The water layer was extracted with 100 mL of ethyl acetate. The organic layer was combined with the extract, and the obtained mixture was then washed with a saturated sodium chloride aqueous solution and was then dried over anhydrous magnesium sulfate. After that, the solvent was distilled away under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1), so as to obtain 2.8 g of 5-methyl-3-(pyridin-2-ylsulfanyl)oxolan-2-ol in the form of a colorless oily product.

来源