CarBoRu - Anionic Carbenes and Borylanions: Tuning the properties of ruthenium complexes in olefin metathesis

CarBoRu - 阴离子卡宾和硼阴离子：调节烯烃复分解中钌配合物的性能

• 批准号: 380280088
• 负责人: Dr. René Frank
• 金额: --
• 依托单位: Institut für Anorganische und Analytische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/380280088?language=en
• 关键词: CarBoRu; Anionic; Carbenes; Borylanions; Tuning

N-heterocyclic carbenes (NHCs) exerted a strong impact on the area of organometallic catalysis. Due to their strong sigma-donor character they are capable of weakening the M-L bond to other sigma-bound co-ligands in trans-position (trans-influence) and better stabilize low-coordinate active species, which are formed in most catalytic cycles. These effects are even expected to be enhanced when the NHC architectures are endowed with negative charges, which either affords anionic carbenes or boryl anions (based on the isoelectronic relationship of a carbon atom C to B-). Employing this very recent concept, the authors of this proposal have demonstrated examples of Au-, Ir- and Pd-catalyzed systems of high activity. In view of the importance and the wide scope of Ru-catalyzed olefin metathesis for C=C bond formations, the strategy of catalyst tuning by the introduction of -1 charges will be expanded to Ru-catalyzed cmetathesis based on this proposal.

氮杂环卡宾化合物在有机金属催化领域有着重要的影响。由于它们强的σ-供体特性，它们能够削弱与反式位置（反式影响）的其他σ-结合的共配体的M-L键，并且更好地稳定在大多数催化循环中形成的低配位活性物质。当NHC结构被赋予负电荷时，甚至预期这些效应被增强，这提供阴离子卡宾或硼基阴离子（基于碳原子C与B-的等电子关系）。采用这一最近的概念，该提案的作者已经证明了高活性的Au，Ir和Pd催化体系的例子。考虑到Ru催化烯烃复分解反应在C=C键形成中的重要性和广泛性，基于这一提议，通过引入-1电荷来调整催化剂的策略将扩展到Ru催化复分解反应。