反应 #2336522

反应方程式

Toluenesulfonyl chloride

7-furyl-3-methyl-4-chromanone oxime

pyridine

→

7-furyl-3-methyl-4-chromanone O-(toluenesulfonyl)-oxime

收率 57.1%

溶剂

CH2Cl2

CH2Cl2

反应条件

后处理

1. 1
   洗涤washed with 5% HCl (20 mL)
2. 2
   干燥The organic layer was dried over MgSO4
3. 3
   过滤filtered
4. 4
   浓缩concentrated
5. 5
   其他The residue was purified via flash chromatography

实验过程

Toluenesulfonyl chloride (397 mg, 2.08 mmol) was added to a 0° C. solution of 7-furyl-3-methyl-4-chromanone oxime (61) (461 mg, 1.89 mmol) and pyridine (0.5 mL) in CH2Cl2 (10 mL). After 6 hours, the mixture was diluted with CH2Cl2 (30 mL) and washed with 5% HCl (20 mL). The organic layer was dried over MgSO4, filtered and concentrated. The residue was purified via flash chromatography using 5:1 hexanes:EtOAc as the eluent, to provide 7-furyl-3-methyl-4-chromanone O-(toluenesulfonyl)-oxime (62) (429 mg) as a pink solid, m.p. 163-164° C. (dec).

来源