methyl (E,2S,3R)-2-[(2R,3S)-2-ethenyloxan-3-yl]oxy-3-[(4-methoxyphenyl)methoxy]-2-methyl-6-prop-2-enoxyhex-4-enoate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 4.0h,
以73%的产率得到methyl (4aS,6S,7R,9aR)-7-[(4-methoxyphenyl)methoxy]-6-methyl-2,3,4,4a,7,9a-hexahydropyrano[3,2-b]oxepine-6-carboxylate