(E)-(4R,6R,8S)-17,19-Bis-(tert-butyl-dimethyl-silanyloxy)-9-methoxymethoxy-4-methyl-3,7-dioxa-tricyclo[13.4.0.06,8]nonadeca-1(19),10,15,17-tetraene-2,13-dione 在
potassium carbonate 作用下,
以
乙二醇二甲醚 为溶剂,
以30%的产率得到(4R,6R,8R,9Z,11E)-17,19-bis[[tert-butyl(dimethyl)silyl]oxy]-4-methyl-3,7-dioxatricyclo[13.4.0.06,8]nonadeca-1(15),9,11,16,18-pentaene-2,13-dione