反应详情

3.12 g of 4,5-bis(4-methoxyphenyl)-2-mercaptoimidazole is dissolved in 50 ml of absolute dimethylformamide and combined with 0.3 g of sodium hydride (80% strength in white oil). The mixture is stirred for 30 minutes and then 1.26 g of 2-chloropyrimidine in 25 ml of dimethylformamide is added dropwise thereto. The reaction mixture is combined with a pinch of powdered copper and stirred for one week under argon at room temperature. The solution is then poured into 300 ml of ice water, the product is extracted with ethyl acetate, the organic solution is dried over sodium sulfate and concentrated to dryness under vacuum. The residue is recrystallized from glacial acetic acid/ether, thus obtaining 2.87 g of 4,5-bis(4-methoxyphenyl)-2-(2-pyrimidylthio)imidazole, mp 86°.

1. stirringstirred for one week under argon at room temperature
2. extractionthe product is extracted with ethyl acetate
3. dry with materialthe organic solution is dried over sodium sulfate
4. concentrationconcentrated to dryness under vacuum
5. customThe residue is recrystallized from glacial acetic acid/ether