A very efficient protocol enabling catalytic decarboxylation of a wide range of 2-alkynoic acids is described. The reaction conditions and the scope of the process are examined. The method is further utilized in a model decarboxylative coupling.
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http://dx.doi.org/10.1021/jo901377b | DOI Listing |
J Hazard Mater
December 2024
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China. Electronic address:
Enhancing the decomposition rate of ammonium perchlorate (AP), the most common oxidizer in solid propellants, is important for improving propellant performance. Metal organic frameworks (MOFs) have been developed as key materials for catalyzing AP decomposition, as they can achieve good dispersion of active sites through in-situ decomposition. Despite having considerable potential, the structural transformation process and catalytic performance of MOFs in AP decomposition are still unclear, which seriously hinders their application in the field of AP decomposition.
View Article and Find Full Text PDFMolecules
December 2024
Department of Chemical Science, University of Catania, 95125 Catania, Italy.
Amines are produced through various industrial and biological processes, contributing significantly to atmospheric pollution, particularly in the troposphere. Moreover, amine-related pollution raises global concerns due to its detrimental effects on human health, environmental quality, and the preservation of animal species. Low-molecular-weight volatile amines, categorized as volatile organic compounds (VOCs), are present in the atmosphere, and they represent the main cause of air pollution.
View Article and Find Full Text PDFMolecules
December 2024
Chemistry Department, College of Science, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates.
The presence of drugs in wastewater effluent is of concern due to their effects on the aquatic fauna and flora and there are growing efforts for their removal from the environment. In this paper, we study the photocatalytic visible-light degradation of naproxen, an over-the-counter anti-inflammatory drug, using 5% copper-doped TiO. The photocatalyst was characterized by XRD and BET surface area measurements.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
U-M: University of Michigan, Department of Chemistry, 930 North University, 48109, Ann Arbor, UNITED STATES OF AMERICA.
Oxetanes are valuable motifs in medicinal chemistry applications, with demonstrated potential to serve as bioisosteres for an array of functional groups. Through the visible-light-mediated photoredox hydrodecarboxylation of 2-aryl oxetane 2-carboxylic acids this work enables access to the products of a [2+2]-photocycloaddition between alkenes and aryl aldehydes without the challenges associated with a traditional UV-light-mediated Paternò-Büchi reaction. Investigation into the hydrodecarboxylation mechanism reveals substrate-dependent modes of initiation under the conditions reported herein.
View Article and Find Full Text PDFOrg Lett
December 2024
Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.
Enamides have emerged as robust alternatives for enamines, exhibiting versatile reactivity for further synthetic modifications, including nucleophilic addition, cycloaddition, and asymmetric hydrogenation. While transition-metal-catalyzed cross-coupling of alkenyl (pseudo)halides with amides has been widely employed to construct this valuable scaffold, it suffers from some limitations, such as the need for transition-metal catalysts and the preparative synthesis of alkenyl (pseudo)halides. In this study, we report a mild and convenient stereoretentive decarboxylative amidation of α,β-unsaturated carboxylic acids with easily procurable 1,4,2-dioxazol-5-ones, providing a practical synthetic route to enamides.
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