反应详情

To a solution of 1-(2-chloro-4-nitroimidazol-1-yl)-2-methyl-3-[4-(4-trifluoromethylphenoxy)-piperidin-1-yl]propan-2-ol prepared in Example 230 (225 mg, 0.49 mmol) in DMF (2.5 ml), sodium hydride (23 mg, 0.59 mmol) was added followed by stirring for 1 hour with cooling on ice-bath. To the reaction mixture, ice-water and ethyl acetate were added. The precipitates were filtered off, washed with water, recrystallized from methylene chloride-diisopropyl ether and then washed with n-hexane to afford 2-methyl-6-nitro-2-[4-(4-trifluoromethylphenoxy)piperidin-1-ylmethyl]-2,3-dihydroimidazo[2,1-b]oxazole (80 mg, yield 39%) as a light yellow solid.

1. temperaturewith cooling on ice-bath
2. filtrationThe precipitates were filtered off
3. washwashed with water
4. customrecrystallized from methylene chloride-diisopropyl ether
5. washwashed with n-hexane