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A Metallomicellar Catalyst for Controlled Oxidation of Alcohols and Lignin Mimics in Water using Open Air as Oxidant.
- Source :
-
ChemSusChem [ChemSusChem] 2024 May 21; Vol. 17 (10), pp. e202301754. Date of Electronic Publication: 2024 Jan 29. - Publication Year :
- 2024
-
Abstract
- Alcohol groups and β-O-4 (C-C) linkages are widespread in biomass feedstock that are abundant renewable resource for value-added chemicals. The development of sustainable protocols for direct oxidation or oxidative cleavage of feedstock materials in a controlled fashion, using open air as an oxidant is an intellectually stimulating task to produce industrially important value-added carbonyls. Further, the oxidative depolymerization of lignin into fine chemicals has evoked interest in recent times. Herein, we report the first example of a catalyst system that could activate molecular oxygen from atmospheric air for controlled oxidation and oxidative cleavage/depolymerization of feedstock materials such as alcohols, β-O-4 (C-C) linkages and real lignin in water under open air conditions. The selectivity of carbonyl products is controlled by altering the pH between ~7.0 and ~12.0. The current strategy highlights the non-involvement of any external co-catalyst, oxidant, radical additives, and/or destructive organic solvents. The catalyst shows a wide substrate scope and eminent functional group tolerance. The upscaled multigram synthesis using an inexpensive catalyst and easily available oxidant evidences the practical utility of the developed protocol. A plausible mechanism has been proposed with the help of a few controlled experiments, and kinetic and computational studies.<br /> (© 2024 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1864-564X
- Volume :
- 17
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- ChemSusChem
- Publication Type :
- Academic Journal
- Accession number :
- 38224525
- Full Text :
- https://doi.org/10.1002/cssc.202301754