反应详情

To a solution of a mixture (300 mg) of ethyl [3-[{2-(4,5-diphenyloxazol-2-yl)-1-cyclopenten-1-yl}methyl]phenoxy]acetate and ethyl [3-[{2-(4,5-diphenyloxazol-2-yl)-2-cyclopenten-1-yl}methyl]phenoxy]acetate in methylene chloride (10 ml) were added sodium carbonate (100 mg) and m-chloroperbenzoic acid (200 mg) at 0° C. After being stirred for 2 hours, the reaction mixture was washed with water and brine and dried over magnesium sulfate. After the solvent was evaporated, the residue containing a mixture of ethyl [3-[{2-(4,5-diphenyloxazol-2-yl)-1,2-epoxycyclopentan-1-yl}methyl]phenoxy]acetate and ethyl [3-[(2-(4,5-diphenyloxazol-2-yl)-2,3-epoxycyclopentan-1-yl]methyl]phenoxy]acetate was dissolved in a mixture of ethyl acetate-ethanol (20 ml-10 ml), and thereto was added 10% palladium on carbon (50 mg). After being stirred for 6 hours under hydrogen atmosphere, the reaction mixture was filtered. The solvent was evaporated in vacuo, the residue was chromatographed on silica gel. The first fraction gave ethyl [3-[{2-(4,5-diphenyloxazol-2-yl)-1-hydroxycyclopentan-1-yl}methyl]phenoxy]acetate (70 mg).

1. washthe reaction mixture was washed with water and brine
2. dry with materialdried over magnesium sulfate
3. customAfter the solvent was evaporated
4. additionthe residue containing
5. additiona mixture of ethyl [3-[{2-(4,5-diphenyloxazol-2-yl)-1,2-epoxycyclopentan-1-yl}methyl]phenoxy]acetate and ethyl [3-[(2-(4,5-diphenyloxazol-2-yl)-2,3-epoxycyclopentan-1-yl]methyl]phenoxy]acetate
6. dissolutionwas dissolved in a mixture of ethyl acetate-ethanol (20 ml-10 ml)
7. additionwas added 10% palladium on carbon (50 mg)
8. stirringAfter being stirred for 6 hours under hydrogen atmosphere
9. filtrationthe reaction mixture was filtered
10. customThe solvent was evaporated in vacuo
11. customthe residue was chromatographed on silica gel