反应详情

温度

70 °C

124 mg of potassium carbonate and 0.10 ml of n-hexyliodide were added to a dimethylformamide solution containing 200 mg of (1S,4aS,6S,7R,7aR)-6,7-epoxy-1,4a,5,6,7,7a-hexahydro-7-methyl-1-(methylcarbamoyloxy) cyclopenta [c]-pyrane-4-carboxylic acid described in Example 1 followed by heating and stirring for 1 hour at 70° C. The reaction mixture was then extracted with ethyl acetate. After washing the organic phase with dilute hydrochloric acid, saturated aqueous sodium bicarbonate and brine, it was dried over anhydrous magnesium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel chromatography to obtain a colorless oil from the hexane-ethyl acetate eluate in the form of (1S,4aS,6S,7R,7aR)-6,7-epoxy-1,4a,5,6,7,7a-hexahydro-7-methyl-1-(methylcarbamoyloxy) cyclopenta [c]-pyrane-4-carboxylic acid n-hexylester (210 mg, yield: 80%). The physicochemical properties of this compound are described in Table 1, Compound No. 5.

1. temperatureby heating
2. extractionThe reaction mixture was then extracted with ethyl acetate
3. washAfter washing the organic phase with dilute hydrochloric acid, saturated aqueous sodium bicarbonate and brine, it
4. dry with materialwas dried over anhydrous magnesium sulfate
5. distillationAfter distilling off the solvent under reduced pressure
6. customthe residue was purified by silica gel chromatography