Annulation–retro-Claisen cascade of bifunctional peroxides for the synthesis of lactone natural products
作者:Qianlan Xu、Jialin Li、Xuemin Li、Lin Hu
DOI:10.1039/d1cc06207g
日期:——
annulation–retro-Claisen cascade, which involves the [4 + 1] or [5 + 1] annulation of α-benzoylacetates with bielectrophilic peroxides and a subsequent debenzoylation process under mild basic conditions, has been developed for the rapid construction of valuable tetrahydrofuran- and dihydropyran-2-carboxylates in good yields. By employing the new reaction, the unified total synthesis of γ- and δ-lactone
一种新型高效的环化-逆克莱森级联反应,涉及 α-苯甲酰乙酸酯与双亲电子过氧化物的 [4 + 1] 或 [5 + 1] 环化以及随后在温和碱性条件下的脱苯甲酰化过程,已被开发用于快速以良好的收率构建有价值的四氢呋喃-和二氢吡喃-2-羧酸盐。通过采用新反应,γ-和δ-内酯天然产物如(±)-tanikolide、(±)-goniothalamins、(±)-7- epi- goniodiol和(±)-plakolide A的统一全合成分4-7步完成。