| Full text | |
| Author(s): |
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]
Total Authors: 8
|
| Affiliation: | [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
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | CATALYSTS; v. 11, n. 5 MAY 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 16/16738-7 - Study of the influence of organic ligands on the reactivity of gold nanoparticles |
| Grantee: | Liane Marcia Rossi |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 19/13569-8 - Study of the Mechanisms of Action in Photodynamic Therapy: From Photosensitizer to Practical Application |
| Grantee: | Lucas Danilo Dias |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |