反应详情

The above 1-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-4-chloro-3-(5-(4-hydroxyimino-3-fluorophenyl)-2-thienylmethyl)benzene (175 mg) was dissolved in chloroform (5 ml) and added thereto was 1,1′-carbonyldiimidazole (46 mg). The mixture was stirred at room temperature overnight. 1,1′-Carbonyldiimidazole (92 mg) was further added thereto, and the mixture was stirred at 40° C. for 6 hours. The reaction solution was cooled and diluted with ethyl acetate and water. The organic layer was separated and successively washed with brine. After drying over magnesium sulfate, the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to give 1-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-4-chloro-3(5-(4-cyano-3-fluorophenyl)-2-thienylmethyl)benzene (158 mg) as colorless caramel. APCI-Mass m/Z 675/677 (M+NH4).

1. additionadded
2. stirringthe mixture was stirred at 40° C. for 6 hours
3. temperatureThe reaction solution was cooled
4. customThe organic layer was separated
5. washsuccessively washed with brine
6. dry with materialAfter drying over magnesium sulfate
7. customthe solvent was evaporated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1)