Flow Chemistry‐Enabled Divergent and Enantioselective Total Syntheses of Massarinolin A, Purpurolides B, D, E, 2,3‐Deoxypurpurolide C, and Structural Revision of Massarinolin A
作者:Ye‐Cheng Wang、Chengsen Cui、Mingji Dai
DOI:10.1002/anie.202109625
日期:2021.11.15
ring systems: a bicyclo[3.1.1]heptane, an oxaspiro[3.4]octane, and a dioxaspiro[4.4]nonane (oxaspirolactone). Herein, we report the first enantioselective total syntheses of massarinolin A, purpurolides B, D, E, and 2,3-deoxypurpurolide C. Our synthesis and computational analysis also led to a structural revision of massarinolin A. The divergent approach features an enantioselective organocatalyzed
Massarinolin A 和 purpurolides 是具有生物活性的佛手柑倍半萜烯,由多种具有挑战性的环系统缩合而成:双环 [3.1.1] 庚烷、oxaspiro[3.4] 辛烷和 dioxaspiro[4.4]nonane(oxaspirolactone)。在此,我们报告了 massarinolin A、purpurolides B、D、E 和 2,3-deoxypurpurolide C 的首次对映选择性全合成。我们的合成和计算分析也导致了 massarinolin A 的结构修正。不同的方法具有对映选择性有机催化Diels-Alder 反应在高 ee 中安装第一个手性中心,可扩展的流动光化学沃尔夫重排以构建关键的双环 [3.1.1] 庚烷,呋喃氧化环化形成氧螺内酯,后期烯丙基 CH 氧化,以及迈尔斯的
Method for producing zoanthamine alkaloid and intermediate used in same
申请人:Miyashita Masaaki
公开号:US20060036094A1
公开(公告)日:2006-02-16
The present invention provides a method for producing a zoanthamine alkaloid and an intermediate suitably used in the method. The method realizes high-yield synthesis of a zoanthamine alkaloid such as norzoanthamine or the like.
Highly effective: We report herein the first and highly efficient totalsyntheses of norzoanthamine and zoanthamine in full detail, which involves stereoselective synthesis of the requisite triene for an intramolecular Diels–Alder reaction via three‐component coupling reactions, the intramolecular Diels–Alder reaction, and subsequent crucial bis‐aminoacetalization as the key steps.
Synthetic studies of zoanthamine alkaloids. Stereoselective synthesis of the ABC ring system of norzoanthamine by an intramolecular Diels–Alder reaction
Stereoselective synthesis of the ABCring system of norzoanthamine having five asymmetric centers including two quaternary carbon atoms has been successfully accomplished by an intramolecular Diels–Alder reaction. A key intermediate for the Diels–Alder reaction was efficiently and stereoselectively synthesized by a tandem conjugate addition–aldol strategy and subsequent photosensitized oxidation of