Immobilization of Rh(I)-N-Xantphos and Fe(II)-C-Scorpionate onto Magnetic Nanoparticles: Reusable Catalytic System for Sequential Hydroformylation/Acetalization

Autor(es)

Rodrigues, Fabio M. S. ^[1] ; Dias, Lucas D. ^{[2, 1]} ; Calvete, Mario J. F. ^[1] ; Maria, Teresa M. R. ^[1] ; Rossi, Liane M. ^[3] ; Pombeiro, Armando J. L. ^[4] ; Martins, Luisa M. D. R. S. ^[4] ; Pereira, Mariette M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Coimbra, Ctr Quim Coimbra, Dept Quim, Rua Larga, P-3004535 Coimbra - Portugal

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Dept Quim Fundamental, Inst Quim, BR-05508000 Sao Paulo, SP - Brazil

^[4] Univ Lisbon, Ctr Quim Estrutural, Inst Super Tecn, Ave Rovisco Pais, P-1049001 Lisbon - Portugal

• Tipo de documento: Artigo Científico
• Fonte: CATALYSTS; v. 11, n. 5 MAY 2021.
• Citações Web of Science: 0

Resumo

Two heterogeneous catalysts, MNP@SiO2-N-Xantphos/Rh(I) and MNP@SiO2-NH-C-scorpionate/Fe(II), were prepared by reaction of chloro-functionalized MNP@SiO2 with N-Xantphos and amino-functionalized MNP@SiO2 with iron(II)/C-allyl-scorpionate through nucleophilic substitution and hydroaminomethylation reactions, respectively. All catalysts were characterized using standard spectroscopic means, transmission electron microscopy (TEM), thermogravimetry (TG), and inductively coupled plasma optical emission spectrometry (ICP-OES). An active and highly selective one-pot hydroformylation/acetalization homogeneous system for the transformation of terminal and highly substituted olefins (including terpenes) onto ethyl acetals is described. A synergic effect of bimetallic Rh(I)/P and Fe(II)/C-scorpionate catalysts is disclosed for the first time. The further sequential use of the heterogeneous catalysts, MNP@SiO2-N-Xantphos/Rh(I) and MNP@SiO2-NH-C-scorpionate/Fe(II) in hydroformylation/acetalization reactions allows the direct transformation of olefin onto ethyl acetals, keeping the activity and selectivity. Both catalysts were easily recovered by magnetic separation and reused with negligible loss of activity/selectivity, after six reutilization cycles. (AU)

• Processo FAPESP: 16/16738-7 - Estudo da influência de ligantes orgânicos sobre a reatividade de nanopartículas de ouro
• Beneficiário: Liane Marcia Rossi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/13569-8 - Estudo dos Mecanismos de Ação em Terapia Fotodinâmica: Do Fotossensibilizador à Aplicação Prática
• Beneficiário: Lucas Danilo Dias
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado