反应 #2307973

反应方程式

Triethylamine

ethyl 6-hydroxyhexanoate

methanesulfonyl chloride

→

compound 2

收率 85.3%

Ethyl 6-methylsulfonyloxyhexanoate

收率 85.3%

溶剂

dichloromethane

dichloromethane

反应条件

后处理

1. 1
   过滤The mixture was filtered through silica gel
2. 2
   洗涤the filtrate was washed successively with water, saturated NaHCO3, water and brine
3. 3
   干燥The organics were dried over Na2SO4
4. 4
   过滤filtered
5. 5
   浓缩concentrated in vacuo to a pale yellow oil
6. 6
   其他Final purification of the crude product

实验过程

A solution of monodispersed ethyl 6-hydroxyhexanoate (50.76 ml, 50.41 g, 227 mmol) in dry dichloromethane (75 ml) was chilled in an ice bath and placed under a nitrogen atmosphere. Triethylamine (34.43 ml, 24.99 g, 247 mmol) was added. A solution of methanesulfonyl chloride (19.15 ml, 28.3 g, 247 mmol) in dry dichloromethane (75 ml) was added dropwise from an addition funnel. The mixture was stirred for three and one half hours, slowly being allowed to come to room temperature as the ice bath melted. The mixture was filtered through silica gel, and the filtrate was washed successively with water, saturated NaHCO3, water and brine. The organics were dried over Na2SO4, filtered and concentrated in vacuo to a pale yellow oil. Final purification of the crude product was achieved by flash chromatography (silica gel, 1/1 hexanes/ethyl acetate) to give the monodispersed compound 2 (46.13 g, 85%) as a clear, colorless oil. FAB MS: m/e 239 (M+H), 193 (M—C2H5O).

来源