反应详情

Following the procedure of Example 1 but using 0.738 g. of PGF2α, 0.347 ml. of triethylamine, 0.326 ml. of isobutylchloroformate, and 0.612 g. of 4-hydroxy-9-fluorenone, there is obtained a crude residue. This residue is subjected to silica gel chromatography, eluting with ethyl acetate-water (99:1) followed by ethyl acetate-acetone-water (70:30:1). The residue obtained by concentration of selected fractions, 0.650 g., is crystallized from ethyl acetate-hexane (10:7) as the title compound, white free-flowing crystals, m.p. 83.8°-86.8° C. having Rf 0.27 (TLC on silica gel in ethyl acetate).