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DFT 研究 Phobcat 前催化剂作用下 1-辛烯复分解反应机理。

DFT investigation of the 1-octene metathesis reaction mechanism with the Phobcat precatalyst.

机构信息

Catalysis and Synthesis Research Group, Chemical Resource Beneficiation Focus Area, North-West University, Potchefstroom, South Africa.

出版信息

J Mol Model. 2009 Nov;15(11):1371-81. doi: 10.1007/s00894-009-0513-2. Epub 2009 May 31.

DOI:10.1007/s00894-009-0513-2
PMID:19484276
Abstract

The productive self-metathesis reaction of 1-octene in the presence of the Phobcat precatalyst [RuCl(2)(Phoban-Cy)(2)(=CHPh)] using density functional theory was investigated and compared to the Grubbs 1 precatalyst [RuCl(2)(PCy(3))(2)(=CHPh)]. At the GGA-PW91/DNP level, the geometry optimization of all the participating species and the PES scans of the various activation and catalytic cycles in the dissociative mechanism were performed. The formation of the catalytically active heptylidene species is kinetically and thermodynamically favored, while the formation of trans-tetradecene is thermodynamically favored.

摘要

使用密度泛函理论研究了 Phobcat 前催化剂[RuCl(2)(Phoban-Cy)(2)(=CHPh)]存在下 1-辛烯的生产性自反式交叉反应,并与 Grubbs 1 前催化剂[RuCl(2)(PCy(3))(2)(=CHPh)]进行了比较。在 GGA-PW91/DNP 水平上,对所有参与物种的几何优化以及离解机制中各种活化和催化循环的 PES 扫描进行了计算。催化活性的庚基物种的形成在动力学和热力学上都是有利的,而反式十四烯的形成在热力学上是有利的。

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本文引用的文献

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Phosphabicyclononane-containing ru complexes: efficient pre-catalysts for olefin metathesis reactions.含磷双环壬烷的钌配合物:烯烃复分解反应的高效预催化剂。
J Org Chem. 2008 Jan 4;73(1):259-63. doi: 10.1021/jo702169p. Epub 2007 Dec 6.
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Development of isomerization and cycloisomerization with use of a ruthenium hydride with N-heterocyclic carbene and its application to the synthesis of heterocycles.使用含氮杂环卡宾的氢化钌进行异构化和环异构化反应的开发及其在杂环合成中的应用。
J Org Chem. 2006 May 26;71(11):4255-61. doi: 10.1021/jo060308u.
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DFT prediction and experimental observation of substrate-induced catalyst decomposition in ruthenium-catalyzed olefin metathesis.
钌催化烯烃复分解反应中底物诱导催化剂分解的密度泛函理论预测与实验观察
J Am Chem Soc. 2004 Nov 10;126(44):14332-3. doi: 10.1021/ja0453174.
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Tandem enyne metathesis-Diels-Alder reaction for construction of natural product frameworks.用于构建天然产物骨架的串联烯炔复分解-狄尔斯-阿尔德反应。
J Org Chem. 2004 Mar 19;69(6):2084-93. doi: 10.1021/jo0356311.
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Mechanism and activity of ruthenium olefin metathesis catalysts: the role of ligands and substrates from a theoretical perspective.钌烯烃复分解催化剂的机理与活性:从理论角度看配体和底物的作用
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New strategy for the total synthesis of macrosphelides a and B based on ring-closing metathesis.基于闭环复分解反应的大环球霉素A和B全合成新策略。
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Total synthesis and structural confirmation of the marine natural product Dysinosin A: a novel inhibitor of thrombin and Factor VIIa.
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Syntheses of anolignans A and B using ruthenium-catalyzed cross-enyne metathesis.
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J Am Chem Soc. 2001 Jan 31;123(4):749-50. doi: 10.1021/ja003582t.
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Mechanism and activity of ruthenium olefin metathesis catalysts.钌烯烃复分解催化剂的作用机制与活性
J Am Chem Soc. 2001 Jul 11;123(27):6543-54. doi: 10.1021/ja010624k.