报道了第一个连续流动 Z-选择性烯烃复分解过程。Key to realizing this process was the adequate choice of stereoselective catalysts combined with the design of an appropriate continuous reactor setup. 设计的连续工艺允许各种自、交叉和大环闭环复分解反应,以高选择性和短停留时间提供产品。该技术通过直接应用于一系列信息素和大环气味分子的制备来举例说明,并在一个伸缩的 Z 选择性交叉复分解/迪克曼环化序列中达到高潮,以获取 ( Z )-Civetone,并结合一系列连续搅拌罐反应堆。
描述了使用基于钌的复分解催化剂的 Z 选择性大环化的第一份报告。对于具有各种官能团和环大小的多种底物,Z 大环的选择性始终很高。同样的催化剂也用于 E 和 Z 大环混合物的 Z 选择性乙烯醇解,提供纯 E 异构体。值得注意的是,只需要 1 个大气压的乙烯压力。这些方法已成功应用于几种嗅觉大环化合物的构建以及细胞毒性生物碱莫托泊明 C 的正式全合成。
[EN] IMPROVED OLEFIN METATHESIS CATALYSTS<br/>[FR] CATALYSEURS DE MÉTATHÈSE D'OLÉFINES AMÉLIORÉS
申请人:BERGEN TEKNOLOGIOVERFØRING AS
公开号:WO2017009232A1
公开(公告)日:2017-01-19
The present invention refers to novel ruthenium-based catalysts for olefin metathesis reactions, particularly to fast initiating catalysts having stereoselective properties. In olefin metathesis reactions, the disclosed catalysts provide a high catalytic activity combined with the capability to generate higher yields of the olefin metathesis product.
Pyridine-Stabilized Fast-Initiating Ruthenium Monothiolate Catalysts for <i>Z</i>-Selective Olefin Metathesis
作者:Giovanni Occhipinti、Karl W. Törnroos、Vidar R. Jensen
DOI:10.1021/acs.organomet.7b00441
日期:2017.9.11
Pyridine as a stabilizing donor ligand drastically improves the performance of ruthenium monothiolate catalysts for olefin metathesis in comparison with previous versions based on a stabilizing benzylidene ether ligand. The new pyridine-stabilized ruthenium alkylidenes undergo fast initiation and reach appreciable yields combined with moderate to high Z selectivity in self-metathesis of terminal olefins
Efficient and Selective Formation of Macrocyclic Disubstituted Z Alkenes by Ring-Closing Metathesis (RCM) Reactions Catalyzed by Mo- or W-Based Monoaryloxide Pyrrolide (MAP) Complexes: Applications to Total Syntheses of Epilachnene, Yuzu Lactone, Ambretto
作者:Chenbo Wang、Miao Yu、Andrew F. Kyle、Pavol Jakubec、Darren J. Dixon、Richard R. Schrock、Amir H. Hoveyda
DOI:10.1002/chem.201204045
日期:2013.2.18
for efficient Z‐selective formation of macrocyclic disubstituted alkenes through catalytic ring‐closing metathesis (RCM) is described. Cyclizations are performed with 1.2–7.5 mol % of a Mo‐ or W‐based monoaryloxide pyrrolide (MAP) complex at 22 °C and proceed to complete conversion typically within two hours. Utility is demonstrated by synthesis of representative macrocyclic alkenes, such as natural
描述了通过催化闭环复分解 (RCM)高效Z选择性形成大环双取代烯烃的第一套广泛适用的方案。在 22 °C 下,使用 1.2–7.5 mol% 的 Mo 或 W 基单芳基氧化物吡咯烷 (MAP) 络合物进行环化,通常在两小时内完成转化。代表性的大环烯烃的合成证明了实用性,例如天然产物柚子内酯(13 元环:73 % Z)表漆烯(15 元环:91 % Z)、Ambrettolide(17 元环:91 % Z)、埃坡霉素 C 和 A(16 元环:高达 97 % Z)和 nakadomarin A(15 元环:高达97 % Z)的高级前体Z )。我们表明,催化Z选择性环化可以在克级有效地进行,复杂的分子起始材料和催化剂可以在空气中处理。我们阐明了催化协议的几个关键原则:1) Mo 催化剂的互补性质,提供高活性,但更容易产生 RCM 后立体异构化,而 W 变体提供较低的活性但不太倾向于导致失去动力学Z选择性。2)
Z-SELECTIVE RING-CLOSING METATHESIS REACTIONS
申请人:Hoveyda Amir H.
公开号:US20120323000A1
公开(公告)日:2012-12-20
The present invention relates generally to olefin metathesis. In some embodiments, the present invention provides methods for Z-selective ring-closing metathesis.
本发明通常涉及烯烃交换反应。在某些实施例中,本发明提供了Z-选择性环闭合交换反应的方法。
Z-selective ring-closing metathesis reactions
申请人:Hoveyda Amir H.
公开号:US09073801B2
公开(公告)日:2015-07-07
The present invention relates generally to olefin metathesis. In some embodiments, the present invention provides methods for Z-selective ring-closing metathesis.