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ls-反式第一菊酸经甲酯化、臭氧化、还原和差向异构化制得1R-顺式皆醇酸内酯,再经过中间产物皆硫醚酸被转变成1R-顺式皆醛酸半缩醛内酯。
ls-trans-first chrysanthemic acid by methyl esterification, ozonation, reduction and epimerization to obtain 1R-cis all aldol lactone, and then through the intermediates are thioether acid is converted into 1R-cis All aldehyde hemiacetal lactone.