反应详情

温度

60 °C

A mixture of (1,1-dioxo-tetrahydro-1lambda*6*-thiophen-3-yl)-methanol (3.59 g), 4-toluenesulfonyl chloride (9.11 g) and pyridine 5.8 mL) in chloroform (50 mL) was heated to 60° C. and stirred overnight. The reaction mixture was cooled and diluted with 100 mL 1N HCl and extracted with methylene chloride. The combined organic extracts were washed with brine, dried (MgSO4), filtered and concentrated under reduced pressure. The residue was purified by flash chromatography (60% EtOAc in hexanes) to give 4.012 g of toluene-4-sulfonic acid 1,1-dioxo-tetrahydro-1lambda*6*-thiophen-3-ylmethyl ester.

1. temperatureThe reaction mixture was cooled
2. extractionextracted with methylene chloride
3. washThe combined organic extracts were washed with brine
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by flash chromatography (60% EtOAc in hexanes)