total synthesis of (±)-ibogamine in nine steps and 24% overall yield. The approach features a Mitsunobu fragment coupling and macrocyclic Friedel–Crafts alkylation to establish the nitrogen-containing core of ibogamine. A regio- and diastereoselective hydroboration allows for simultaneous formation of the tetrahydroazepine and isoquinuclidine ring systems via sulfonamide deprotection and concomitant
Oxidative construction of unusual indole-derived intermediates en route to conodusine A
作者:Alexander J. Hughes、Steven D. Townsend
DOI:10.1016/j.tetlet.2024.154931
日期:2024.3
We describe several approaches to the tricyclic core of conodusine A. Synthesis of a macrocyclic alkene set the stage for 1,2-olefin difunctionalization with conodusine’s pendent amine. Unanticipated reactivity of an unusually labile indole mitigated the desired olefin manipulation. Efforts to pre-install the oxidation state at C19 before macrocyclic ring closure were met with unexpected results. Additionally
我们描述了几种获得 conodusine A 三环核心的方法。大环烯烃的合成为用 conodusine 的侧胺进行 1,2-烯烃双官能化奠定了基础。异常不稳定的吲哚的意外反应性减轻了所需的烯烃操作。在大环闭合之前预先设定 C19 氧化态的努力得到了意想不到的结果。此外,Conodusine 完整碳骨架的后期烯丙基氧化充满了不可预见的挑战。
Carbocyclic Ring Construction via an Intramolecular Diels-Alder Reaction of an <i>in Situ-</i>Generated, Heteroatom-Stabilized Allyl Cation: Total Synthesis of (±)-Lycopodine
作者:Paul A. Grieco、Yujia Dai
DOI:10.1021/ja980117b
日期:1998.5.1
Synthetic studies on dynemicin A. New quinoline synthesis for C, D and E rings.
作者:Toshio Nishikawa、Minoru Isobe
DOI:10.1016/s0040-4020(01)85633-7
日期:——
aryltin compounds and α-bromoenone derivatives in the presence of palladium catalyst. The products were transformed under acidic conditions to substituted quinoline derivatives which contained all the carbon atoms except for the acetylenic group in E ring of dynemicin A.