Thionyl Chloride → 6,11-Dihydro-11-oxo-dibenzo[b,e]thiepine-2-acetic acid
反応式
S(Cl)(Cl)=O.C([O:7][C:8](=[O:27])[CH2:9][C:10]1[CH:15]=[CH:14][C:13]([S:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=2[C:24]([OH:26])=O)=[CH:12][CH:11]=1)C>>[O:26]=[C:24]1[C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][C:18]=2[CH2:17][S:16][C:13]2[CH:14]=[CH:15][C:10]([CH2:9][C:8]([OH:7])=[O:27])=[CH:11][C:12]1=2参加物
3
実験手順
66 cc of thionyl chloride are added at room temperature to 13.2 g of 4-(2-carboxy-benzyl-thio)phenyl-acetic acid ethyl ester and the mixture is stirred for 90 minutes until gas evolution stops. The mixture is completely concentrated by evaporation at reduced pressure and the resulting light yellow oil is dissolved in ether, whereby 4-(2-chloro-carbonyl-benzyl-thio)phenyl-acetic acid ethyl ester precipitates in the form of light yellow crystals. M.P. 78°-79°.
後処理
- concentrationThe mixture is completely concentrated by evaporation at reduced pressure
- dissolutionthe resulting light yellow oil is dissolved in ether
- customwhereby 4-(2-chloro-carbonyl-benzyl-thio)phenyl-acetic acid ethyl ester precipitates in the form of light yellow crystals