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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Reactions and Mechanistic Studies of Rhenium-Catalyzed Insertion of alpha,beta-Unsaturated Carbonyl Compounds into a C-H Bond
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Reactions and Mechanistic Studies of Rhenium-Catalyzed Insertion of alpha,beta-Unsaturated Carbonyl Compounds into a C-H Bond

机译：hen催化α，β-不饱和羰基化合物插入C-H键的反应和机理研究

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摘要

A rhenium complex, [ReBr(CO)(3)(thf)](2), catalyzes the insertion of alpha,beta-unsaturated carboryl compounds into a C-H bond of aromatic compounds having nitrogen-containing directing groups. In this reaction, Re-2(CO)(10) call also be used as a catalyst. When imines are employed as the aromatic substrates, sequential cyclization proceeds and indene derivatives are obtained in good to excellent yields. This reactivity is ill contrast to those of ruthenium and rhodium complexes, which are usually used as catalysts in the insertion reactions of unsaturated molecules into a C-H bond. Investigations oil the reaction mechanism indicate that the rhenium catalyst promotes C-H bond activation of aromatic compounds, the insertion of alpha,beta-unsaturated carbonyl compounds into a Re-C bond, and intramolecular nucleophilic cyclization followed by reductive elimination and the elimination of an amine.
机译：complex络合物[ReBr（CO）（3）（thf）]（2）催化α，β-不饱和碳硼烷基化合物插入具有含氮指挥基的芳族化合物的C-H键中。在该反应中，也称Re-2（CO）（10）为催化剂。当将亚胺用作芳族底物时，顺序进行环化，并以良好或优异的产率获得茚衍生物。该反应性与钌和铑配合物的反应性形成对比，钌和铑配合物通常在不饱和分子插入C-H键的插入反应中用作催化剂。对反应机理的研究表明indicate催化剂可促进芳族化合物的C-H键活化，将α，β-不饱和羰基化合物插入Re-C键以及分子内亲核环化反应，然后进行还原消除和胺消除反应。

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