The first examples of heterogeneous Fe-catalysed cyclopropanation reactions are presented. Pyrolysis of in situ-generated iron/phenanthroline complexes in the presence of a carbonaceous material leads to specific supported nanosized iron particles, which are effective catalysts for carbene transfer reactions. Using olefins as substrates, cyclopropanes are obtained in high yields and moderate diastereoselectivities. The developed protocol is scalable and the activity of the recycled catalyst after deactivation can be effectively restored using an oxidative reactivation protocol under mild conditions.

Iron/N-doped graphene nano-structured catalysts for general cyclopropanation of olefins / A. Sarkar, D. Formenti, F. Ferretti, C. Kreyenschulte, S. Bartling, K. Junge, M. Beller, F. Ragaini. - In: CHEMICAL SCIENCE. - ISSN 2041-6520. - 11:24(2020), pp. 6217-6221. [10.1039/D0SC01650K]

Iron/N-doped graphene nano-structured catalysts for general cyclopropanation of olefins

A. Sarkar
Primo
;
D. Formenti
Secondo
;
F. Ferretti;F. Ragaini
2020

Abstract

The first examples of heterogeneous Fe-catalysed cyclopropanation reactions are presented. Pyrolysis of in situ-generated iron/phenanthroline complexes in the presence of a carbonaceous material leads to specific supported nanosized iron particles, which are effective catalysts for carbene transfer reactions. Using olefins as substrates, cyclopropanes are obtained in high yields and moderate diastereoselectivities. The developed protocol is scalable and the activity of the recycled catalyst after deactivation can be effectively restored using an oxidative reactivation protocol under mild conditions.
heterogeneous catalysis; iron; cyclopropanation; carbene transfer; cyclopropane
Settore CHIM/03 - Chimica Generale e Inorganica
Settore CHIM/06 - Chimica Organica
   Towards a Sustainable Chemistry: Design of Innovative Metal-Ligand Systems for Catalysis and Energy Applications.
   MINISTERO DELL'ISTRUZIONE E DEL MERITO
   20154X9ATP_001
2020
8-giu-2020
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/745686
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