反应 #2547

反应方程式

sodium bicarbonate

3,4-dihydro-2H-pyrane

4-Hydroxymethyl-N-(2-methoxyphenyl)benzenesulfonamide

p-toluenesulfonic acid monohydrate

→

title compound

收率 91.2%

4-Tetrahydropyranyloxymethyl-N-(2-methoxyphenyl)benzenesulfonamide

收率 91.2%

溶剂

methylene chloride

反应条件

后处理

1. 1
   温度with cooling in an ice bath
2. 2
   萃取extracted with ether
3. 3
   洗涤The resulting organic layer was washed with saturated brine
4. 4
   干燥dried on anhydrous magnesium sulfate
5. 5
   其他the solvent was removed by evaporation
6. 6
   其他Thereafter, the thus obtained light yellow oily material was purified by a silica gel column chromatography (ether:hexane=1:1)

实验过程

4-Hydroxymethyl-N-(2-methoxyphenyl)benzenesulfonamide (99.6 mg, 0.34 mmol) was dissolved in methylene chloride (3 ml) to which, with cooling in an ice bath, were subsequently added 3,4-dihydro-2H-pyrane (48 μl, 0.51 mmol) and a catalytically effective amount of p-toluenesulfonic acid monohydrate. After 90 minutes of stirring at the same temperature, the reaction solution was mixed with saturated sodium bicarbonate aqueous solution (5 ml) and extracted with ether. The resulting organic layer was washed with saturated brine and dried on anhydrous magnesium sulfate, and the solvent was removed by evaporation. Thereafter, the thus obtained light yellow oily material was purified by a silica gel column chromatography (ether:hexane=1:1) to obtain 117 mg (91.2%) of the title compound in the form of colorless solid.

来源