反应详情

温度

-5 °C

(S)-2-(p-Toluenesulfonylamino)-1,4-butanediol, 2, (46 g) was dissolved in methylene chloride (450 mL) and triethylamine (60 g) was added. The resulting solution was cooled to -5° C. under a nitrogen atmosphere and a solution of methanesulfonyl chloride (42.0 g) in methylene chloride (110 mL) was added dropwise over 3 hours. The resulting mixture was stirred an additional 0.5 hour at 0° to -5° C. and water (150 mL) and methylene chloride (350 mL) were cautiously added. The layers were separated and the organic layer extracted with 0.1N HCl (100 mL) and demineralized water (100 mL) and then concentrated under vacuum to give (S)-2-(2'-methanesulfonyloxyethyl)-1-(p-toluenesulfonyl)aziridine, 3, as a light yellow solid (57.2 g) which was used directly in the next step without further purification. A portion was recrystallized from ethyl acetate and hexanes: mp 78°-80° C.

1. customThe layers were separated
2. extractionthe organic layer extracted with 0.1N HCl (100 mL) and demineralized water (100 mL)
3. concentrationconcentrated under vacuum