(5S,11R,Z)-methyl 9-acetoxy-3-methyl-7-oxo-11-(prop-1-en-2-yl)-6,16-dioxatricyclo[11.2.1.15,8]heptadeca-1(15),2,8(17),13-tetraene-14-carboxylate 以
乙腈 为溶剂,
反应 1.0h,
以78%的产率得到(2R,3R,7R,9S)-methyl 7-acetoxy-5-oxo-2,9-di(prop-1-en-2-yl)-4,14-dioxatricyclo[9.2.1.13,6]pentadeca-1(13),6(15),11-triene-12-carboxylate