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Type: Artigo de periódico
Title: Phosphine-free Heck Reaction: Mechanistic Insights And Catalysis "on Water" Using A Charge-tagged Palladium Complex
Author: Dos Santos M.R.
Coriolano R.
Godoi M.N.
Monteiro A.L.
De Oliveira H.C.B.
Eberlin M.N.
Neto B.A.D.
Abstract: A novel Pd-complex with a charge tag (imidazolium cation) was applied for online monitoring of the neutral Heck reaction by electrospray ionization (tandem) mass spectrometry-ESI-MS(/MS). The results shed light on the mechanism of the reaction, whereas the charge-tagged ligand also allowed the unprecedented MS monitoring of Pd2+ reduction to Pd0. Key reaction intermediates associated with Pd catalysis could also be detected and characterized due to the presence of the charge tag on the Pd-complex. DFT calculations supported the proposed mechanism. The new charge-tagged Pd-complex is also shown to function as an active catalyst "on water" with the advantage of using cheaper and less reactive aryl chloride substrates in a phosphine-free version of the Heck reaction. © the Partner Organisations 2014.
Editor: Royal Society of Chemistry
Rights: aberto
Identifier DOI: 10.1039/c4nj00285g
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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