[NH:1]1[CH:5]=[C:4]([CH:6]=[O:7])[N:3]=[CH:2]1.[Cl:8][C:9]1[CH:14]=[CH:13][C:12](I)=[CH:11][CH:10]=1.CN[C@@H]1CCCC[C@H]1NC.C(=O)([O-])[O-].[Cs+].[Cs+]>[NH4+].[Cl-].[Cu]I.CN(C=O)C>[Cl:8][C:9]1[CH:14]=[CH:13][C:12]([N:1]2[CH:5]=[C:4]([CH:6]=[O:7])[N:3]=[CH:2]2)=[CH:11][CH:10]=1
To a mixture of 1H-imidazole-4-carbaldehyde (3.71 g, 38.6 mmol), 1-chloro-4-iodobenzene (13.81 g, 57.9 mmol), (1R,2R)—N1,N2-dimethylcyclohexane-1,2-diamine (1.10 g, 7.72 mmol), copper(I) iodide (0.368 g, 1.93 mmol) and cesium carbonate (25.2 g, 77 mmol) was added DMF (50 mL). The reaction was sealed and heated to 110° C. for 18 hours. The reaction mixture was then cooled to room temperature and diluted with a saturated solution of NH4Cl. A brown solid develops. Solid was collected, washed with water and air dried. Solid material was then dissolved in 10% MeOH:90% DCM solution and dried (Na2SO4), filtered and concentrated to afford a dark brown solid 1-(4-chlorophenyl)-1H-imidazole-4-carbaldehyde (8.55 g, 41.4 mmol, 107% yield). Material as used without further purification. LCMS m/z 207.1 (M+H)+, Rt 0.58 min.
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