反应详情

温度

60 °C

To a solution of (1R,2S,3S,4R,5S)-1-(acetoxymethyl)-5-(4-chloro-3-(4-hydroxybenzyl)phenyl)-6,8-dioxabicyclo[3.2.1]octane-2,3,4-triyl triacetate (500 mg, 0.86 mmol) in dry DMF (10 mL), was added (1-bromopropan-2-yloxy)(tert-butyl)dimethylsilane (327 mg, 1.3 mmol) and cesium carbonate (847 mg, 2.6 mmol). The reaction mixture was was stirred at 60° C. for 14 h. After completion of reaction, as confirmed by TLC, the reaction mixture was diluted with ethylacetate (150 mL) and washed with water (3×10 mL). The organic layer was dried over anhydrous Na2SO4 and volatiles were evaporated in vacuo. The residue obtained was purified by column chromatography (silica gel, 2:8 Ethyl acetate:Pet. Ether) to afford title compound (350 mg, 53.8%) as white solid.

1. customAfter completion of reaction
2. washwashed with water (3×10 mL)
3. dry with materialThe organic layer was dried over anhydrous Na2SO4 and volatiles
4. customwere evaporated in vacuo
5. customThe residue obtained
6. customwas purified by column chromatography (silica gel, 2:8 Ethyl acetate:Pet. Ether)