Transition metal imide/organic imine metathesis reactions: unexpected observations

McInnes, Jacqueline M.

doi:10.1039/a803719a

Cited by 47 publications

(38 citation statements)

References 8 publications

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“…In contrast, their metal imide (MQNR) counterparts have received less attention yet can act as an intermediate in imido group (QNR) transfer reactions. 9 The importance of imido complexes and their isolable analogues is well-established in organic synthesis and catalysis. 10,11 Stoichiometric or catalytic reactions may occur at the MQNR fragment itself, 12 or the imido group may remain a spectator, as in Schrock's group 6 olefin metathesis catalysts 13 and imido-based Ziegler-Natta type olefin polymerisation catalysts.…”

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confidence: 99%

Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis

et al. 2016

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Upon prolonged thermal exposure under vacuum, a well-defined single-site surface species [([triple bond, length as m-dash]Si-O-)Zr(NEt2)3] () evolves into an ethylimido complex [([triple bond, length as m-dash]Si-O-)Zr([double bond, length as m-dash]NEt)NEt2] (). Reactions of with an imine substrate result in imido/imine ([double bond, length as m-dash]NRi, R: Et, Ph) exchange (metathesis) with the formation of [([triple bond, length as m-dash]Si-O-)Zr([double bond, length as m-dash]NPh)NEt2] (). Compounds and effectively catalyze imine/imine cross-metathesis and are thus considered as the first heterogeneous catalysts active for imine metathesis.

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confidence: 99%

Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis

et al. 2016

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“…Other research in this area has shown that Ti, [80] Re, [81] and Nb [82] complexes also catalyze imine/imine metathesis.Imine/ imine metathesis via carbonyl intermediates [83] and imine/ amine metathesis [84] have also been studied with av iew to applications in dynamic combinatorial chemistry.…”

Section: Angewandte Chemiementioning

confidence: 99%

Catalytic Isofunctional Reactions—Expanding the Repertoire of Shuttle and Metathesis Reactions

2019

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Transfer hydrogenation, alkene metathesis and alkyne metathesis possess great value to the synthetic chemistry community. One of the key features of these processes is their reversibility which can be attributed to the presence of the same number and type of functional groups in both the reactants and products, making these reactions isofunctional. These classic reactions have recently inspired the development of novel shuttle and metathesis reactions that offer great promise for synthetic chemistry. This review describes and systematically categorizes both recent and older examples of shuttle and metathesis reactions other than transfer hydrogenation and alkene/alkyne metathesis.

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“…Weitere Forschung in diesem Gebiet ergab,d ass auch Ti-, [80] Rh- [81] und Nb-Komplexe [82] eine Imin/Imin-Metathese katalysieren. Eine Imin/Imin-Metathese über ein Carbonylintermediat [83] sowie eine Imin/Amin-Metathese [84] wurden ebenfalls hinsichtlich ihrer Verwendung in der dynamischkombinatorischen Chemie untersucht.…”

Section: Aufsätzeunclassified

Katalytische, isofunktionelle Reaktionen – Erweiterung des Repertoires an Shuttle‐ und Metathesereaktionen

Bhawal

Morandi

2019

Angewandte Chemie

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Transferhydrierungsreaktionen, genauso wie Metathesereaktionen von Alkenen und Alkinen, sind von großer Bedeutung in der Synthesechemie. Ein gemeinsames Schlüsselmerkmal dieser Verfahren ist ihre Reversibilität, die davon herrührt, dass sowohl Startverbindungen als auch Produkte die gleiche Anzahl und Art von funktionellen Gruppen aufweisen und die Verfahren somit isofunktionell machen. Diese klassischen Reaktionen trugen in letzter Zeit dazu bei, neuartige Shuttle‐ und Metathesereaktionen zu entwickeln, die vielversprechend für die Synthesechemie sein könnten. Dieser Aufsatz beschreibt und ordnet aktuelle wie auch ältere Beispiele von Shuttle‐ und Metathesereaktionen (mit Ausnahme von Transferhydrierungen und Metathesereaktionen von Alkenen und Alkinen).

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Transition metal imide/organic imine metathesis reactions: unexpected observations

Abstract: Fig. 1 Linear plots of [1] t /[1] 0 versus time for the reactions with an excess of PhC(NTol)H 5 in CDCl 3 showing clearly the zero order dependence of rate on [1]. Legend: 5 10 equivalents of 5; :, 16.5 equivalents of 5; -, 20 equivalents of 5.

Cited by 47 publications

References 8 publications

Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis

Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis

Catalytic Isofunctional Reactions—Expanding the Repertoire of Shuttle and Metathesis Reactions

Katalytische, isofunktionelle Reaktionen – Erweiterung des Repertoires an Shuttle‐ und Metathesereaktionen

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