Ammonia → 2-Chloroimidazo[1,2-a]pyridine-3-sulfonamide
Reaction equation
[Cl:1][C:2]1[N:3]=[C:4]2[CH:9]=[CH:8][CH:7]=[CH:6][N:5]2[C:10]=1[S:11](Cl)(=[O:13])=[O:12].[NH3:15]>C(#N)C>[Cl:1][C:2]1[N:3]=[C:4]2[CH:9]=[CH:8][CH:7]=[CH:6][N:5]2[C:10]=1[S:11]([NH2:15])(=[O:13])=[O:12]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A solution of 4.6 g of 2-chloroimidazo[1,2-a]pyridine- 3-sulfonyl chloride in 60 ml of acetonitrile is added to 60 ml of aqueous ammonia under cooling and the mixture is stirred at room temperature for 2 hours. The acetonitrile is distilled off under reduced pressure and the resulting crystals are collected by filtration and washed with water to give 3.8 g of the title compound. Recrystallization from dilute ethanol gives colorless needles.
Workup
- temperatureunder cooling
- distillationThe acetonitrile is distilled off under reduced pressure
- filtrationthe resulting crystals are collected by filtration
- washwashed with water
Sources & evidence
- ORD record
- ord-3a78fbf8a72c413ebc8f99e7c622c49a
- Source dataset
- uspto-grants-1991_02
- Patent number
- US04994571
Reaction notes
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