反应详情

0.43 g (15 mmol) of sodium hydride are initially introduced in 25 ml of DMF with ice-cooling. 3.33 g (13.7 mmol) of 2-hydroxymethyl-4-(4-mercaptobutylthio)-3-methylpyridine are added. After the evolution of gas has ended, 2.62 g (13.7 mmol) of 1-(2-chloroethyl)-2-methyl-5-nitroimidazole in 10 ml of DMF are added dropwise. The mixture is stirred with ice- cooling for 1 h. It is then diluted with 200 ml of ice-water and neutralized with acetic acid. The mixture is extracted 3 times with dichloromethane. The combined organic phases are washed 4 times with water, dried over magnesium sulfate, filtered and concentrated. The crude product is chromatographed on silica gel using ethyl acetate/methanol/conc. ammonia=89/10/1. The title compound is obtained on concentrating as a yellow crystallizate which is washed by stirring with diethyl ether. M.p. 86°-87° C.; yield 4 g (75% of theory).

1. temperaturecooling
2. temperaturecooling for 1 h
3. extractionThe mixture is extracted 3 times with dichloromethane
4. washThe combined organic phases are washed 4 times with water
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude product is chromatographed on silica gel