Green synthesis of δ-lactam from biomass-derived 4-hydroxy-6-methylpyridin-2(1H)-one

Abstract

Hydrodeoxygenation is usually essential step for biomass valorization owing to their highly oxygenated nature, and the catalytic transfer hydrogenation provides a promising alternative for hydrodeoxygenation of biomass feedstocks because of...

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. In the case of metal hydrides, such as sodium borohydride (NaBH 4 ), lithium aluminum hydride (LiAlH 4 ), etc., these hydrogen sources suffers from several disadvantages, due to the use of a large amount of reducing agents, low atom efficiency, high cost at large scale, coproduction of stoichiometric amounts of metal salts waste, and their tedious separation process. − Moreover, due to the good reducing properties of these reagents, sometimes selective hydrogenation was not favorable.…”

Facile and sustainable recovery of spent LiFePO4 battery cathode materials in a Ca(ClO)2 system

“…[3][4][5] The manufacturing capacity of LiFePO 4 battery cathode materials has been increasing in tandem with the rise in the electric vehicle market demand and the ongoing enhancement of lithium-ion battery electrode material performance. 6,7 According to the 2023 white paper published by EV Tank, China Battery Industry Research Institute and China YiWei Institute of Economics, active materials for LiFePO 4 battery cathode materials in China accounted for 58.65% of the lithium battery market share in 2022. 8 The necessity for safe disposal and comprehensive recovery of spent LiFePO 4 battery cathode materials (SLFPB-Ms) is growing along with the production of LiFePO 4 battery cathode materials.…”