Thionyl Chloride → 3-Chlorocarbonyl-10,11-dihydro-11-oxodibenzo[b,f][1,4]thiazepin
Reaction equation
[O:1]=[C:2]1[C:8]2[CH:9]=[CH:10][C:11]([C:13](O)=[O:14])=[CH:12][C:7]=2[S:6][C:5]2[CH:16]=[CH:17][CH:18]=[CH:19][C:4]=2[NH:3]1.S(Cl)([Cl:22])=O>>[Cl:22][C:13]([C:11]1[CH:10]=[CH:9][C:8]2[C:2](=[O:1])[NH:3][C:4]3[CH:19]=[CH:18][CH:17]=[CH:16][C:5]=3[S:6][C:7]=2[CH:12]=1)=[O:14]Participants
3
Procedure
Heat a solution of 5 gm. of 10,11-dihydro-11-oxodibenzo[b,f][1,4]thiazepin-3-carboxylic acid and 40 ml of thionyl chloride under reflux for 20 minutes. Evaporate the reaction mixture under vacuum to dryness. Repeat the evaporation with two 30 ml portions of carbon tetrachloride. Crystallize the residue from diisopropyl ether to obtain the title product.
Workup
- temperatureHeat a solution of 5 gm
- customEvaporate the reaction mixture under vacuum to dryness
- customRepeat the evaporation with two 30 ml portions of carbon tetrachloride