<1S-<1α(4R*,5S*),3α,4β,5α,6α(2E,4R*,6R*),7β>>-1-<4-(acetyloxy)-5-methyl-3-methylene-6-phenylhexyl>-3-(bromoacetyl)-4,6,7-trihydroxy-2,8-dioxabicyclo<3.2.1>octane-4,5-dicarboxylic acid, 6-(4,6-dimethyl-2-octenoate), 4,5-dimethyl ester 在
2,4,6-三甲基吡啶 、 lithium iodide 作用下,
以
乙醚 、
乙醇 为溶剂,
反应 63.0h,
生成 <1S-<1α(4R*,5S*),3α,4β,5α,6α(2E,4R*,6R*),7β>>-1-<4-(acetyloxy)-5-methyl-3-methylene-6-phenylhexyl>-3-(1,3-thiazol-4-yl)-4,6,7-trihydroxy-2,8-dioxabicyclo<3.2.1>octane-4,5-dicarboxylic acid, 6-(4,6-dimethyl-2-octenoate), 4-methyl ester