Copper nanoparticles supported on highly nitrogen-rich covalent organic polymers as heterogeneous catalysts for the<i>ipso</i>-hydroxylation of phenyl boronic acid to phenol

Velu, S.; Harikrishnan, Muniyasamy; Elamathi, Ganesan; Balasaravanan, Rajendran; Murugesan, S.; Siva, Ayyanar

doi:10.1039/c9nj05759e

Cited by 19 publications

(7 citation statements)

References 49 publications

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“…A variety of homogeneous catalysts, such as sodium chlorite, 14 ascorbic acid, 15 Na 2 SO 3 , 7 etc., have been employed for the hydroxylation reaction but they suffer from certain drawbacks. Heterogeneous catalysts Sm 2 O 3 , 16 V 2 O 5 /TiO 2 , 2 Cu/TCOP, 17 CuS, 18 Ag/Zeolite, 19 CuFe 2 O 4 , 20 Ag NP montK-10, 21 Ru-(bpy) 3 Cl 2 •6H 2 O, 13 Fe 2 O 3 @SiO 2 , 22 Pd NPs, 23 polymer-supported AuNP, 24 etc. have been explored widely in this regard.…”

Section: Introductionmentioning

confidence: 99%

Surface Nanoarchitectonics of Boron Nitride Nanosheets for Highly Efficient and Sustainableipso-Hydroxylation of Arylboronic Acids

Choudhary

Kumari

Sharma

et al. 2023

ACS Appl. Mater. Interfaces

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One of the important industrial processes commonly employed in the pharmaceutical, explosive, and plastic manufacturing industries is ipso-hydroxylation of arylboronic acids. In this work, a straightforward, metal-free methodology for the synthesis of phenols from arylboronic acids has been demonstrated using hydroxyl functionalized boron nitride (BN−OH) nanosheets. The functionalized hydroxyl groups on the BN nanosheets act as the active sites for the hydroxylation reaction to take place. The detailed optimization of reaction parameters was done in order to attain high catalytic efficiency, and the reactions were conducted in water, which eliminates the use of toxic solvents. The as-synthesized catalysts exhibited excellent recyclability and reusability in addition to high product yields and good turnover numbers. The green metrics parameters were also evaluated for the model reaction to examine the sustainable nature of the developed protocol. The use of BN−OH catalysts for the ipso-hydroxylation reactions under base-free and metal-free conditions using environmentally benign solvents is utmost desired for industrial processes and can pave a way toward sustainable organic catalysis.

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Section: Introductionmentioning

confidence: 99%

Surface Nanoarchitectonics of Boron Nitride Nanosheets for Highly Efficient and Sustainableipso-Hydroxylation of Arylboronic Acids

Choudhary

Kumari

Sharma

et al. 2023

ACS Appl. Mater. Interfaces

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“…[13][14][15][16][17][18][19][20] COPs can also be synthesized in a variety of ways, including through the polymerization of small molecules or through selfassembly of pre-formed building blocks. [21][22][23][24][25] Some potential applications of COPs include gas storage materials for hydrogen and carbon dioxide, [26][27][28] heterogeneous catalysts for organic reactions, [29][30][31] and electrode materials for supercapacitors and battery devices. [32][33][34][35] Supercapacitors (SCs), in particular, have emerged as potential electrochemical energy storage systems and have gained popularity due to their outstanding high-power density, quick charge/discharge processes, exceptional stability, and environmental friendliness.…”

Section: Introductionmentioning

confidence: 99%

Pyrene-based covalent organic polymers with nano carbonaceous composites for efficient supercapacitive energy storage

Ejaz,

Mohamed,

Huang

et al. 2023

J. Mater. Chem. A

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“…Copper-based catalysts are employed in many important industrial processes such as oxidations, [1][2][3][4][5][6] hydrogenations, [7][8][9] coupling reactions, [10] and catalytic reforming. [11,12] Copper is an excellent catalyst candidate due to its abundance in nature, nontoxicity and accessible oxidation states (0, + 1, + 2).…”

Section: Introductionmentioning

confidence: 99%

Inherent Redox Activity of Titania Support Enhances Catalytic Activity of Highly Dispersed Cu Catalyst

et al. 2022

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Modifying active species loading, particle size, and distribution on a support is an effective method for tuning catalyst activity. In this work, a copper catalyst anchored on titania was synthesized using the deposition-precipitation method at low weight % in order to obtain a highly dispersed catalyst (1-Cu/ TiO 2 ). The interactions between the copper and TiO 2 support contribute to the physical and chemical properties of the catalyst. Transmission electron micrographs indicate copper nanoparticles with ∼ 2 nm diameter with a fairly uniform distribution across the TiO 2 particles. This synthetic approach yields a catalyst that is more active than similar precious metal catalysts, and therefore is a possible approach for creating highly efficient catalysts from economic materials.

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Copper nanoparticles supported on highly nitrogen-rich covalent organic polymers as heterogeneous catalysts for theipso-hydroxylation of phenyl boronic acid to phenol

Abstract: Here, we report the synthesis of highly nitrogen-rich covalent organic polymers as a solid heterogeneous catalyst for the oxidation of phenylboronic acid under atmospheric conditions in an aqueous medium to achieve very good yields up to 99%.

Cited by 19 publications

References 49 publications

Surface Nanoarchitectonics of Boron Nitride Nanosheets for Highly Efficient and Sustainableipso-Hydroxylation of Arylboronic Acids

Surface Nanoarchitectonics of Boron Nitride Nanosheets for Highly Efficient and Sustainableipso-Hydroxylation of Arylboronic Acids

Pyrene-based covalent organic polymers with nano carbonaceous composites for efficient supercapacitive energy storage

Inherent Redox Activity of Titania Support Enhances Catalytic Activity of Highly Dispersed Cu Catalyst

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