(1S,2R,4R,6R,7S,8S,12R,13S,15S)-13,15-dihydroxy-4-(4-methoxyphenyl)-7,18,18-trimethyl-11-methylidene-8-(phenylmethoxymethoxy)-3,5-dioxatetracyclo[13.2.1.02,6.07,12]octadecan-14-one 在
aluminum tri-tert-butoxide 作用下,
以
苯 为溶剂,
反应 0.83h,
以80%的产率得到(3S)-3-[(2R,4R,5R)-5-[(1S,2R,6S)-2-(2-hydroxyacetyl)-1-methyl-3-methylidene-6-(phenylmethoxymethoxy)cyclohexyl]-2-(4-methoxyphenyl)-1,3-dioxolan-4-yl]-2,2-dimethylcyclopentan-1-one