4-Toluenesulfonyl chloride → 5-methyl-1-tosyl-1H-imidazole-4-carbaldehyde

Participants

Reaction Steps

To a suspension of 5-methyl-1H-imidazole-4-carbaldehyde (20 g) in N,N-dimethylformamide (100 ml) was added triethylamine (20.5 g) and p-toluenesulfonyl chloride (38 g). The mixture was stirred under ice-cooling for two hours. The reaction mixture was diluted with water (600 ml) and separated organic layer was filtered. The residue obtained was suspended in methanol (100 ml). After being stirred at ambient temperature for two hours, the mixture was cooled and filtered to give 5-methyl-1-tosyl-1H-imidazole-4-carbaldehyde (40.3 g).

Provenance & Evidence