Thionyl Chloride → 2-(Trichloromethyl)benzoyl chloride
Reaction equation
[Cl:1][C:2]([Cl:13])([Cl:12])[C:3]1[CH:11]=[CH:10][CH:9]=[CH:8][C:4]=1[C:5](O)=[O:6].S(Cl)([Cl:16])=O>>[Cl:1][C:2]([Cl:13])([Cl:12])[C:3]1[CH:11]=[CH:10][CH:9]=[CH:8][C:4]=1[C:5]([Cl:16])=[O:6]Participants
3
Procedure
Similarly, reaction of 2-trichloromethylbenzoic-acid with thionyl chloride affords 2-trichloromethylbenzoyl-chloride, which, on reaction with diethylamine, affords 2-trichloromethyl-N,N-diethylbenzamide. Following a procedure similar to that described in Preparation 5, reaction of the latter with s-butyl lithium and reaction of the resulting lithium salt with sulfur dioxide followed by sodium hydroxyl-amine-O-sulfonate affords 2-trichloromethyl-6-aminosulfonyl-N,N-diethylbenzamide, which, on heating in glacial acetic acid, affords 4-trichloromethylsaccharin.
Sources & evidence
- ORD record
- ord-4dda1909836644b98f24b9061112ddf6
- Source dataset
- uspto-grants-1998_07
- Patent number
- US05783589
Reaction notes
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