Montmorillonite‐K10‐Catalyzed Microwave‐Assisted Direct Amidation of Unactivated Carboxylic Acids with Amines: Maintaining Chiral Integrity of Substrates
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DOI: 10.1002/ajoc.201600590
Abstract: A microwave assisted, selective and green methodology has been developed for the direct amidation of carboxylic acids with amines using montmorillonite K10 as a heterogeneous catalyst. This is the first report for transition metal free,… read more here.
Keywords: acids amines; carboxylic acids; microwave assisted; direct amidation ... See more keywords
Reactivity of Ir–NSiN Complexes: Ir‐Catalyzed Dehydrogenative Silylation of Carboxylic Acids
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DOI: 10.1002/cctc.201701488
Abstract: This work describes the results from the studies on the potential of [Ir(μ‐Cl)(cod)]2 (cod=1,5‐cyclooctadiene) as metallic precursor for the preparation of Ir(NSiN) complexes (NSiN=fac‐bis‐(pyridine‐2‐yloxy)methylsilyl). The reaction of [Ir(μ‐Cl)(cod)]2 with bis‐(pyridine‐2‐yloxy)methylsilane enabled the synthesis of [Ir(H)(Cl)(NSiN)(η2‐cod)]… read more here.
Keywords: nsin; silylation carboxylic; nsin complexes; carboxylic acids ... See more keywords
Synthesis and Cytotoxicity of Octahydroepoxyisoindole‐7‐carboxylic Acids and Norcantharidin–Amide Hybrids as Norcantharidin Analogues
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DOI: 10.1002/cmdc.201900180
Abstract: Octahydroepoxyisoindole analogues of norcantharidin were accessed through a Diels–Alder reaction of an amine‐substituted furan with maleic anhydride and subsequent reduction of the bicyclo[2.2.1]heptene olefin. Despite retention of the carboxylate and the ether bridgehead known to… read more here.
Keywords: norcantharidin analogues; synthesis cytotoxicity; carboxylic acids; cytotoxicity octahydroepoxyisoindole ... See more keywords
Effect of Cp-Ligand Methylation on Rhodium(III)-Catalyzed Annulations of Aromatic Carboxylic Acids with Alkynes: Synthesis of Isocoumarins and PAHs for Organic Light-Emitting Devices.
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DOI: 10.1002/cplu.202000048
Abstract: An efficient protocol was developed for the synthesis of π-extended isocoumarins and polycyclic aromatic hydrocarbons based on the oxidative coupling of aromatic carboxylic acids with internal alkynes catalyzed by (cyclopentadienyl)rhodium complexes. The coupling chemoselectivity strongly… read more here.
Keywords: rhodium; effect ligand; carboxylic acids; light ... See more keywords
Hetero‐Coupling of Bio‐Based Medium‐Chain Carboxylic Acids by Kolbe Electrolysis Enables High Fuel Yield and Efficiency
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DOI: 10.1002/cssc.202201426
Abstract: Abstract Mixtures of n‐carboxylic acids (n‐CA) as derived from microbial conversion of waste biomass were converted to bio‐fuel using Kolbe electrolysis. While providing full carbon and electron balances, key parameters like electrolysis time, chain length… read more here.
Keywords: kolbe electrolysis; hetero coupling; fuel; electrolysis ... See more keywords
Beyond Kolbe and Hofer–Moest: Electrochemical Synthesis of Carboxylic Anhydrides from Carboxylic Acids
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DOI: 10.1002/open.202200059
Abstract: Abstract Herein we report a conceptually new non‐decarboxylative electrolysis of carboxylic acids to obtain their corresponding anhydrides as highly valuable reagents in organic synthesis. All carbon atoms of the starting material are preserved in the… read more here.
Keywords: kolbe hofer; hofer moest; moest electrochemical; synthesis ... See more keywords
Scalable Microreactor Concept for the Continuous Kolbe Electrolysis of Carboxylic Acids Using Aqueous Electrolyte
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DOI: 10.1002/open.202200171
Abstract: Abstract The Kolbe electrolysis is a promising reaction to combine the usage of electrons as reagents and the application of renewable generated carboxylic acids as raw materials producing value added chemicals. Within this study, the… read more here.
Keywords: kolbe electrolysis; aqueous electrolyte; kolbe; concept continuous ... See more keywords
Boron-Catalyzed α-Functionalizations of Carboxylic Acids.
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DOI: 10.1002/tcr.202200273
Abstract: Catalytic, chemoselective, and asymmetric α-functionalizations of carboxylic acids promise up-grading simple feedstock materials to value-added functional molecules, as well as late-stage structural diversifications of multifunctional molecules, such as drugs and their leads. In this personal… read more here.
Keywords: functionalizations carboxylic; boron catalyzed; catalyzed functionalizations; carboxylic acids ... See more keywords
Intermolecular interaction as a direct measure of water solubility advantage of meloxicam cocrystalized with carboxylic acids
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DOI: 10.1007/s00894-018-3649-0
Abstract: AbstractThe solubility advantage (SA) of meloxicam cocrystalized with mono- and dicarboxylic acids was expressed in terms of equilibrium constants involving active pharmaceutical ingredient and coformer in aqueous solutions. It is argued that SA can be… read more here.
Keywords: solubility advantage; advantage meloxicam; meloxicam cocrystalized; water ... See more keywords
Photoelectrochemical and spectroscopical surface analysis of TiO2 nanorods/Ag nanoparticles toward organic carboxylic acids oxidation
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DOI: 10.1007/s10008-017-3553-z
Abstract: The photoelectrochemical interaction of TiO2-based heterostructures was evaluated in an alkaline medium. These structures were fabricated by attaching silver nanoparticles (NPs) onto TiO2 nanorods (NRs), synthesized using hydrothermal methodology, by electrodeposition as a time function.… read more here.
Keywords: tio2 nanorods; microscopy; analysis; carboxylic acids ... See more keywords
Capillary Gas Chromatographic Separation of Carboxylic Acids Using an Acidic Water Stationary Phase
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DOI: 10.1007/s10337-017-3333-z
Abstract: An acidic water stationary phase is used for the analysis of carboxylic acids in capillary gas chromatography (GC). Under regular pH 7 operating conditions, these analytes are largely ionized and elute poorly, if at all,… read more here.
Keywords: phase; stationary phase; water; carboxylic acids ... See more keywords