Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions

Silva, Lorenna C. L. L. F.; Neves, Vinícius A.; Ramos, Vitor S.; Silva, Raphael S. F.; Campos, José B. de; Silva, Alexsandro A. da; Malta, Luiz F. B.; Senra, Jaqueline D.

doi:10.3390/catal9040302

Open AccessCommunication

Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions

by

Lorenna C. L. L. F. Silva

¹,

Vinícius A. Neves

¹,

Vitor S. Ramos

²,

Raphael S. F. Silva

³,

José B. de Campos

²

,

Alexsandro A. da Silva

⁴,

Luiz F. B. Malta

^1,*

and

Jaqueline D. Senra

^1,4,*

¹

Laboratório de Química Supramolecular e de Sólidos, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil

²

Faculdade de Engenharia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro 20550-900, Brazil

³

Instituto Federal do Rio de Janeiro, Campus Rio de Janeiro, Rio de Janeiro 20270-021, Brazil

⁴

Instituto de Química, Universidade do Estado do Rio de Janeiro, Rio de Janeiro 20550-900, Brazil

^*

Authors to whom correspondence should be addressed.

Catalysts 2019, 9(4), 302; https://doi.org/10.3390/catal9040302

Submission received: 29 January 2019 / Revised: 4 March 2019 / Accepted: 18 March 2019 / Published: 27 March 2019

(This article belongs to the Special Issue Catalysis for Global Development. Contributions around the Iberoamerican Federation of Catalysis)

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Abstract

Organic derivatives of boron, such as boronic esters and acids, are important precursors for a wide range of environmental, energy, and health applications. Several catalytic methods for their synthesis have been reported, even though with the use of toxic and structurally complex ligands. Herein, we demonstrate preliminary studies envisaging the synthesis of boronic esters from an inexpensive catalytic system based on Cu/Al layered double hydroxides (LDH) in the presence of Na₂PdCl₄. The Cu/ Al LDHs were prepared according to coprecipitation method and characterized by X-ray diffraction (XRD) (with Rietveld refinement) to evaluate the contamination with malachite and other phases. Preliminary catalytic results suggest that pure Cu/Al LDH has potential for the borylation of aryl iodides/ bromides in the absence of base. Indeed, a synergic effect between copper and palladium is possibly related to the catalytic efficiency.

Keywords: boronic esters; borylation; Suzuki–Miyaura; layered double hydroxides; copper; palladium

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MDPI and ACS Style

Silva, L.C.L.L.F.; Neves, V.A.; Ramos, V.S.; Silva, R.S.F.; Campos, J.B.d.; Silva, A.A.d.; Malta, L.F.B.; Senra, J.D. Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions. Catalysts 2019, 9, 302. https://doi.org/10.3390/catal9040302

AMA Style

Silva LCLLF, Neves VA, Ramos VS, Silva RSF, Campos JBd, Silva AAd, Malta LFB, Senra JD. Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions. Catalysts. 2019; 9(4):302. https://doi.org/10.3390/catal9040302

Chicago/Turabian Style

Silva, Lorenna C. L. L. F., Vinícius A. Neves, Vitor S. Ramos, Raphael S. F. Silva, José B. de Campos, Alexsandro A. da Silva, Luiz F. B. Malta, and Jaqueline D. Senra. 2019. "Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions" Catalysts 9, no. 4: 302. https://doi.org/10.3390/catal9040302

APA Style

Silva, L. C. L. L. F., Neves, V. A., Ramos, V. S., Silva, R. S. F., Campos, J. B. d., Silva, A. A. d., Malta, L. F. B., & Senra, J. D. (2019). Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions. Catalysts, 9(4), 302. https://doi.org/10.3390/catal9040302

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Layered Double Hydroxides as Bifunctional Catalysts for the Aryl Borylation under Ligand-Free Conditions

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