反应 #55883

反应方程式

3-chloro-4-benzyloxyphenylacetic acid

chloride

thionyl chloride

dimethylaminoethanol

chloride

→

β-dimethylaminoethyl 3-chloro-4-benzyloxyphenylacetate hydrochloride

收率 131.1%

溶剂

benzene

benzene

反应条件

后处理

1. 1
   其他so yielding a precipitate which
2. 2
   过滤was filtered
3. 3
   洗涤washed with benzene
4. 4
   其他Two crystallizations from ethylacetate-isopropyl alcohol (1:1)

实验过程

6.15 grams of 3-chloro-4-benzyloxyphenylacetic acid was converted into the corresponding chloride by treatment with 15 ml of thionyl chloride in 50 ml of benzene. A solution comprising 1.85 grams of dimethylaminoethanol in 10 ml of benzene was slowly added at 20° C. to the chloride solution. The mixture was then permitted to stand for 2 hours at that temperature and then cooled to 5° C., so yielding a precipitate which was filtered and washed with benzene. Two crystallizations from ethylacetate-isopropyl alcohol (1:1) yielded 5.6 grams (68.4%) of β-dimethylaminoethyl 3-chloro-4-benzyloxyphenylacetate hydrochloride, m.p. 138°-140° C.

来源