Imidazole → O-[1-(2-Bromophenyl)-2,2,2-trifluoroethyl] 1H-imidazole-1-carbothioate
Reaction equation
[C:1](Cl)(Cl)=[S:2].[NH:5]1[CH:9]=[CH:8][N:7]=[CH:6]1.[Br:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[CH:17]([OH:22])[C:18]([F:21])([F:20])[F:19]>ClCCCl>[Br:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[CH:17]([O:22][C:1]([N:5]1[CH:9]=[CH:8][N:7]=[CH:6]1)=[S:2])[C:18]([F:20])([F:21])[F:19]Participants
Procedure
Thiophosgene (24.0 g, 210.0 mmol) was added portion-wise to a vigorously stirred suspension of imidazole (57.0 g, 840.0 mmol) in 1,2-dichloroethane (500 ml) under an atmosphere of nitrogen. After the addition, the reaction mixture was stirred at room temperature for 30 minutes. 1-(2-Bromophenyl)-2,2,2-trifluoro-ethanol (Preparation 55, 46 g, crude, about 140 mmol) in 1,2-dichloroethane (100 m) was added at room temperature. After the addition, the mixture was heated at reflux for 10 minutes. The reaction mixture was cooled then the solvent was evaporated in vacuo. The crude product was purified by column chromatography on silica gel eluting with petroleum ether, then petroleum ether:ethyl acetate (10:1) to afford the title compound as a yellow oil (41.5 g, 81%).
Workup
- additionAfter the addition
- additionAfter the addition
- temperaturethe mixture was heated
- temperatureat reflux for 10 minutes
- temperatureThe reaction mixture was cooled
- customthe solvent was evaporated in vacuo
- customThe crude product was purified by column chromatography on silica gel eluting with petroleum ether
Sources & evidence
- ORD record
- ord-e8217c93d9844f93aac1f085dfc68a59
- Source dataset
- uspto-grants-2012_03
- Patent number
- US08134007B2
Reaction notes
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