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

Abstract

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.

Upcycling of Plastic Waste Using Photo-, Electro-, and Photoelectrocatalytic Approaches: A Way toward Circular Economy

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Significantly enhanced performance for phenol compounds removal by MOF-5 nano-composite via its surface modification

“…The phenol and its derivatives which represent the majority of toxic chemicals, have entered almost all areas of life 6 . Phenol derivatives are widely utilized in industry, and their presence in surface and wastewater is a problem requiring urgent solution due to their carcinogenic effects, bioaccumulation, weak biodegradability, and high toxicity [7][8][9] . Phenolic molecules are a kind of toxic organic pollutants commonly discharged from industrial effluents.…”

Nanoarchitectonics of Non-Noble-Metal-Based Heterogeneous Catalysts for Transfer Hydrogenation Reactions: Detailed Insights on Different Hydrogen Sources

“…One of the ultimate goals of chemical research in both industries and academia is the creation of sustainable, efficient, and green chemical processes. − In this regard, researchers are working worldwide to develop greener approaches and technologies for the chemical industry, motivated by green chemistry principles and the sustainable development goals of the United Nations (UN). − Out of several chemical processes, selective hydrogenation is one of the most important organic transformation reactions which is extensively used in both chemical laboratories and industries for the synthesis of various pharmaceuticals, agrochemicals, and fine chemicals. − Generally, two methods are mainly utilized for the hydrogenation of organic compounds, i.e., direct hydrogenation via molecular hydrogen gas (H 2 ) and second one is the catalytic transfer hydrogenation (CTH) method, wherein the hydrogen is transferred from various hydrogen sources. Conventionally, the hydrogenation of organic compounds was done by using molecular hydrogen (H 2 ), but this method has some limitations, such as the highly flammable nature of H 2 , the use of high temperature and, in addition, the handling of high-pressurized H 2 increases the infrastructure cost for large-scale industrial reactions, which is not a sustainable approach for hydrogenation reactions. − Due to these drawbacks of molecular H 2 , an alternative approach for hydrogenation reactions is CTH methodology, which can be done by using metal hydride reagents and other suitable hydrogen sources.…”