Cesium carbonate → 4-chloro-1-(4-methoxybutyl)-2-phenyl-1H-imidazole-5-carbaldehyde
Reaction equation
[Cl:1][C:2]1[N:3]=[C:4]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)[NH:5][C:6]=1[CH:7]=[O:8].CS(O[CH2:20][CH2:21][CH2:22][CH2:23][O:24][CH3:25])(=O)=O.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C)C(=O)C.O>[Cl:1][C:2]1[N:3]=[C:4]([C:9]2[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=2)[N:5]([CH2:20][CH2:21][CH2:22][CH2:23][O:24][CH3:25])[C:6]=1[CH:7]=[O:8]Participants
6
Reactant 3
Product 1
Reagents, catalysts & solvents 2
Conditions
- Temperature
- 90 °C
Procedure
To a solution of 4-chloro-2-phenyl-1H-imidazole-5-carbaldehyde (500 mg) and 4-methoxybutyl methanesulfonate (660 mg) in N,N-dimethylacetamide (10 ml) was added cesium carbonate (2.4 g); and the mixture was stirred at 90° C. for 7 hr. After cooling to room temperature, the reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate-hexane (5:95-3:7) was concentrated under reduced pressure to give the object product (702 mg).
Workup
- temperatureAfter cooling to room temperature
- extractionextracted with ethyl acetate
- washThe extract was washed with saturated brine
- dry with materialdried over anhydrous magnesium sulfate
- customThe solvent was evaporated under reduced pressure
- washa fraction eluted with ethyl acetate-hexane (5:95-3:7)
- concentrationwas concentrated under reduced pressure
Sources & evidence
- ORD record
- ord-33743688d0684054aaa5a286aea5c901
- Source dataset
- uspto-grants-2015_06
- Patent number
- US09045436B2
Reaction notes
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