تفاعل #2405

معادلة التفاعل

sodium hydrogen sulfite

4-tert-butyl-N-[6-(2-hydroxyethoxy)pyrimidin-4-yl)benzenesulfonamide

N-bromosuccinimide

→

N-[5-bromo-6-(2-hydroxyethoxy)pyrimidin-4-yl]-4-tert-butylbenzenesulfonamide

المردود 65.7%

المذيبات

dimethylformamide

ظروف التفاعل

المعالجة

1. 1
   استخلاصextracted with ethyl acetate
2. 2
   غسيلThe ethyl acetate layer is washed
3. 3
   أخرىdried
4. 4
   أخرىevaporated
5. 5
   أخرىto remove the solvent
6. 6
   أخرىThe residue is purified by silica gel column chromatography (solvent; chloroform/methanol=40:1)
7. 7
   أخرىrecrystallized from hexane/ethyl acetate

الإجراء التجريبي

To a solution of 4-tert-butyl-N-[6-(2-hydroxyethoxy)pyrimidin-4-yl)benzenesulfonamide (210 mg) in dimethylformamide (4 ml) is added N-bromosuccinimide (116 mg), and the mixture is stirred at room temperature for one hour. The mixture is treated with aqueous sodium hydrogen sulfite solution, and extracted with ethyl acetate. The ethyl acetate layer is washed, dried and evaporated to remove the solvent. The residue is purified by silica gel column chromatography (solvent; chloroform/methanol=40:1), and recrystallized from hexane/ethyl acetate to give N-[5-bromo-6-(2-hydroxyethoxy)pyrimidin-4-yl]-4-tert-butylbenzenesulfonamide (169 mg).

المصدر