(+/-)-(2E,4Z)-7-[(2,2-dimethylethyl)dimethylsilyl]oxy-5-methyl-2,4,8-nontrienoic acid 、
(2R,3R)-3-{3-[(2S,6S)-6-(2-propenyl)tetrahydro-4-methylene-2H-pyran-2-yl]-2-methyl-2-propenyl}oxirane methanol 在
titanium(IV) tetrabutoxide 作用下,
以
二氯甲烷 为溶剂,
以67%的产率得到(2R,3S,5E)-6-[(2S,6S)-6-(2-propenyl)tetrahydro-4-methylene-2H-pyran-2yl]-1,2,3-triol-5-methyl-5-hexen-3-yl (2E,4Z)-7-[(2,2-dimethylethyl)dimethylsilyl]-oxy-5-methyl-2,4,8-nontrienoate