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Updated: May 4, 2026

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
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Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

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タイタノセン (III) クロライドの置換効果と超分子相互作用:単電子段階における触媒への影響

Andreas Gansäuer1, Christian Kube, Kim Daasbjerg

  • 1Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn , Gerhard Domagk Str. 1, 53121 Bonn, Germany.

Journal of the American Chemical Society
|January 9, 2014
PubMed
まとめ

タイタノセン (III) 触媒は,塩化物添加物によって安定させられ,反応中にリガンドの損失を防ぐことができます. この発見は,効率的な単電子伝達触媒反応の設計に役立ちます.

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Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride01:26

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
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When disubstituted benzenes undergo electrophilic substitution, the product distribution depends on the directing effect of both substituents. When the directing effects of both substituents reinforce each other, a single product is obtained. For example, bromination of p-nitrotoluene occurs ortho to the methyl group and meta to the nitro group, which is the same position, resulting in a single product. However, if the directing effects of the two groups oppose each other, the...
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