Versatile Construction of 6-Substituted <i>cis</i>-2,8-Dioxabicyclo[3.3.0]octan-3-ones: Short Enantioselective Total Syntheses of Cheloviolenes A and B and Dendrillolide C
作者:Yuriy Slutskyy、Christopher R. Jamison、Peng Zhao、Juyeol Lee、Young Ho Rhee、Larry E. Overman
DOI:10.1021/jacs.7b04265
日期:2017.5.31
A short enantioselective synthesis of 6-substituted cis-2,8-dioxabicyclo[3.3.0]octan-3-ones is described. The pivotal step is coupling of a tertiary radical generated directly from a tertiary alcohol with a 3-chloro-5-alkoxybutenolide. This strategy is applied toward scalable 14–15 step syntheses of three rearranged spongian diterpenoids: cheloviolenes A and B and dendrillolide C.
描述了6-取代的顺式-2,8-二氧杂双环[3.3.0] octan-3-ones的短对映选择性合成。关键步骤是将由叔醇直接生成的叔自由基与3-氯-5-烷氧基丁烯内酯偶联。该策略适用于三种重排的海绵状二萜类化合物的可扩展的14-15步合成:螯合物A和B和树突状内酯C。