Unprecedented total synthesis of bruceolline D, E, and H
作者:Dnyaneshwar Gaikwad
DOI:10.1080/00397911.2020.1795199
日期:2020.10.17
employed to obtain 3-prenylated indoles. The resulting indoles on the consecutive sequence of epoxidation, cyclization and further oxidation afforded short, protecting group free total synthesis of bruceolline D, E and H. Graphical Abstract
摘要 Wittig 烯化-克莱森重排的单锅策略已被用于获得3-异戊二烯化吲哚。在环氧化、环化和进一步氧化的连续序列上产生的吲哚提供了短的、无保护基团的布鲁氏碱 D、E 和 H 的全合成。
Total Synthesis of Bruceolline I
作者:Dina Scarpi、Cristina Faggi、Ernesto G. Occhiato
DOI:10.1021/acs.jnatprod.7b00311
日期:2017.8.25
The firsttotalsynthesis of the natural product bruceolline I, isolated in small quantities from the ethanol extract of Brucea mollis stems, was achieved in 29% yield over nine steps and with high enantiomeric purity (>98%). The key step of the process is the tandem gold-catalyzed rearrangement/Nazarov reaction of a propargylic acetate derivative. This synthesis provides a sufficient amount of synthesized
Iron-Mediated Hydrogen Atom Transfer Radical Cyclization of Alkenyl Indoles and Pyrroles Gives Their Fused Derivatives: Total Synthesis of Bruceolline E and H
作者:Santosh J. Gharpure、Rupali S. Chavan、Simran R. Narang
DOI:10.1021/acs.orglett.4c00032
日期:2024.6.7
employed for the synthesis of dihydropyrroloindoles and dihydropyrrolizines via 5-exo-trig radical cyclization where indoles and pyrroles are used as an acceptor. This radical approach has also been extended for the synthesis of tetrahydrocyclopenta[b]indolones via the Baldwin-disfavored 5-endo-trig cyclization pathway. The formal synthesis of bruceolline J and the totalsynthesis of bruceollines E
铁介导的氢原子转移(HAT)反应可有效地用于通过 5- exo - trig自由基环化合成二氢吡咯并吲哚和二氢吡咯嗪,其中吲哚和吡咯用作受体。这种激进的方法还被扩展到通过鲍德温不喜欢的 5- end - trig环化途径合成四氢环戊[ b ]吲哚酮。采用前一种策略,布鲁斯酚J的正式合成以及布鲁斯酚E和H的全合成都已顺利进行。