作者:Matthias Henrot、Alexandre Jean、Philippe A. Peixoto、Jacques Maddaluno、Michaël De Paolis
DOI:10.1021/acs.joc.6b00878
日期:2016.6.17
Amenable to late-stage preparation of analogues, a flexible and convergent total synthesis of (±)-aureothin is presented. The strategy was based on a desymmetrization of α,α′-dimethoxy-γ-pyrone by a process combining 1,4-addition and alkylation of vinylogous enolate to stereoselectively reach the backbone of the target. Palladium-catalyzed cyanation of an elaborated and isomerizable E,Z dienyl motif
适用于类似物的后期制备,提出了一种灵活且收敛的(±)-金黄色素的全合成方法。该策略基于α,α'-二甲氧基-γ-吡喃酮的不对称化,该过程通过结合1,4-加成和乙烯基烯醇烯酸酯的烷基化以立体选择性地到达靶标主链的过程来实现。精细和可异构化的E,Z二烯基基序的钯催化氰化反应,然后进行Pinner环化,可以构建四氢呋喃基序,而基于后期氧化的第一种方法却不成功。