反应详情

温度

-30 °C

(2RS,3RS)-2,3-Diethyl-4-oxoazetidine-1-sulfonyl chloride (step 1) (3.2 g, 14.18 mmol) in acetone (7 ml) was treated with thiophenol (2.92 ml, 28.4 mmol) and cooled to −30° C. Pyridine (1.376 ml, 17.01 mmol) in acetone (2.55 ml) was added dropwise over 30 mins, maintaining the temperature around −30° C. After stirring for 30 minutes, water (10 ml) was added slowly and the mixture was filtered. The filtrate was extracted with diethyl ether (5×25 ml) and the combined organic layers were dried MgSO4, filtered and evaporated to dryness (colorless oil 2.3 g). Purification by chromatography on silica eluting with iso-hexane followed by diethyl ether afforded the title compound;

1. temperaturemaintaining the temperature around −30° C
2. filtrationthe mixture was filtered
3. extractionThe filtrate was extracted with diethyl ether (5×25 ml)
4. filtrationfiltered
5. customevaporated to dryness (colorless oil 2.3 g)
6. customPurification by chromatography on silica eluting with iso-hexane