Synthetic Studies of the Rubellin Natural Products: Development of a Stereoselective Strategy and Total Synthesis of (+)-Rubellin C
作者:Jackson A. Gartman、Uttam K. Tambar
DOI:10.1021/acs.joc.1c00920
日期:2021.8.20
This manuscript describes our studies of the class of natural products known as the rubellins, culminating in the totalsynthesis of (+)-rubellin C. These anthraquinone-based natural products contain a variety of stereochemical and architectural motifs, including a 6-5-6-fused ring system, 5 stereogenic centers, and a central quaternary center. Herein, we report our development of a strategy to target
这份手稿描述了我们对称为 rubellins 的天然产物类别的研究,最终导致 (+)-rubellin C 的全合成。这些基于蒽醌的天然产物包含各种立体化学和结构图案,包括 6-5- 6个稠环系统,5个立体中心和一个中央四元中心。在这里,我们报告了我们针对立体化学致密核心和蒽醌核的策略的开发,包括双功能烯丙基硼和三氟甲磺酸乙烯酯试剂、蒽醌苄基金属化策略和后期蒽醌引入策略等方法。我们的研究最终以成功的途径获得高度功能化的蒽醌基天然产物支架和 (+)-rubellin C 的立体选择性全合成。
Pleospdione, A Tricyclic Natural Product with Dense Oxygenation at the A-Ring: Total Synthesis and Incongruity of the Originally Assigned Structure and its C3-Epimer
(3) oxidation of isoxazolium salt for installing an additional angular hydroxy group in stereoselective manner. As a synthetic exercise to highlight the utility of this approach, the first total syntheses of the proposedstructure of pleospdione (1) and its C3-epimer (3-epi-1) have been achieved. The synthesis has proved the efficiency of the strategy as an entry into polyketide-derived complex architectures
A Class of <i>C</i><i><sub>2</sub></i> and Pseudo <i>C</i><i><sub>2</sub></i> Symmetric Ketone Catalysts for Asymmetric Epoxidation. Conformational Effect on Catalysis
作者:Zhi-Xian Wang、Susie M. Miller、Oren P. Anderson、Yian Shi
DOI:10.1021/jo9908849
日期:1999.8.1
A class of C-2 and pseudo C-2 symmetric ketones with one fused ring at each side of the carbonyl group have been prepared from quinic acid and found to be effective catalysts for the asymmetric epoxidation of a variety of olefins. Electron deficient olefins such as enones can be efficiently epoxidized. Encouragingly good enantioselectivity is also obtained for the epoxidation of styrenes. The studies show that the ketone conformation plays an important role in the reactivity and selectivity of the catalyst.
Banwell, Martin G.; Haddad, Najiba; Hudlicky, Tomas, Journal of the Chemical Society. Perkin transactions I, 1997, # 12, p. 1779 - 1791
作者:Banwell, Martin G.、Haddad, Najiba、Hudlicky, Tomas、Nugent, Thomas C.、Mackay, Maureen F.、Richards, Sharon L.
DOI:——
日期:——
Total Synthesis of the Lycorenine-Type Amaryllidaceae Alkaloid (±)-Clivonine via a Biomimetic Ring-Switch from a Lycorine-Type Progenitor
作者:Carles Giró Mañas、Victoria L. Paddock、Christian G. Bochet、Alan C. Spivey、Andrew J. P. White、Inderjit Mann、Wolfgang Oppolzer
DOI:10.1021/ja910184j
日期:2010.4.14
A fully diastereoselective totalsynthesis of the lycorenine-type Amaryllidaceae alkaloid (+/-)-clivonine (19) is reported via a route that employs for the first time a biomimetic ring-switch from a lycorine-type progenitor, thereby corroborating experimentally the biogenetic hypothesis first expounded for these compounds by Barton in 1960.