[ditert-butyl(methyl)silyl] (E)-7-bromohept-5-enoate 、 lithium;3-[(E)-3-[tert-butyl(dimethyl)silyl]oxyoct-1-enyl]-2-methoxy-2-methyl-3H-furan-5-olate 生成 [ditert-butyl(methyl)silyl] (E)-7-[4-[(E)-3-[tert-butyl(dimethyl)silyl]oxyoct-1-enyl]-5-methoxy-5-methyl-2-oxooxolan-3-yl]hept-5-enoate