Results 81 to 90 of about 57,264 (283)

Anionic N-heterocyclic carbenes by decarboxylation of sydnone-4-carboxylates [PDF]

, 2018
Unstable N-heterocyclic carbenes can be masked and stabilized as pseudo-cross-conjugated hetarenium-carboxylates which decarboxylate on warming. This study deals with the decarboxylation of carboxylates of mesoionic compounds to generate anionic N ...
Andreas Schmidt, Foeldes, Tamas, Imre Pápai, Papai, Imre, Adam, Arnold, Ana-Luiza Lücke, Sascha Wiechmann, Mimoza Gjikaj, Luecke, Ana-Luiza, Martin Nieger, Schmidt, Andreas, Nieger, Martin, Arnold Adam, Adam, Arnold E. W., Tyll Freese, Freese, Tyll, Lücke, Ana-Luiza, Gjikaj, Mimoza, Wiechmann, Sascha, Földes, Tamás, Tamás Földes   +20 more
core   +1 more source

Electrochemical Oxidative Dihydrobenzofuran Synthesis

ChemElectroChem
We herein report the synthesis of dihydrobenzofurans via an oxidative cycloetherification process under electrochemical conditions. By starting from phenol‐based ketones or β‐ketolactones, it is possible to access the dihydrobenzofuran targets under ...
David Pollheimer, Maximilian Radetzky, Mario Waser   +2 more
doaj   +1 more source

Nucleophilic Benzoylation Using a Mandelic Acid Dioxolanone as a Synthetic Equivalent of the Benzoyl Carbanion. Oxidative Decarboxylation of α-Hydroxyacids

Molecules, 2004
The synthesis of alkyl aryl ketones using a mandelic acid dioxolanone as a synthetic equivalent (Umpolung) of the benzoyl carbanion is reported. The methodology involves alkylation of the mandelic acid dioxolanone, hydrolysis of the dioxolanone moiety in
José R. Pedro, Belén Monje, Isabel Fernández, Gonzalo Blay   +3 more
doaj   +1 more source

Aldehydes and Ketones Formation: Copper-Catalyzed Aerobic Oxidative Decarboxylation of Phenylacetic Acids and α‑Hydroxyphenylacetic Acids

, 2016
Aromatic aldehydes or ketones from copper catalyzed aerobic oxidative decarboxylation of phenylacetic acids and α-hydroxyphenylacetic acids have been synthesized.
Qiuling Song (1393048), Qiang Feng (88137)   +1 more
core   +1 more source

Manganese (III)-Bis(salicylaldehyde)-4-Methyl-1,2-Phenylenediimine (Mn-BSMP) as an Inexpensive N2O2 Type Schiff Base Catalyst for Oxidative Decarboxylation of Carboxylic Acids with (n-Bu4NIO4) in the Presence of Imidazol [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2011
In this study, bis(salicylaldehyde)-4-methyl-1,2-phenylenediimine (BSMP) as a Schiff base ligand of N2O2-type and its Mn and Fe complex as M-BSMP catalyst were synthesized and characterized by UV-Vis, IR spectroscopy and elemental analysis.
Gholamreza Karimipour, Morteza Montazerozohori, Nasrin Haghighat Naeini   +2 more
doaj  

Hypervalent iodine(III)-mediated decarboxylative acetoxylation at tertiary and benzylic carbon centers

Beilstein Journal of Organic Chemistry, 2018
The decarboxylative acetoxylation of carboxylic acids using a combination of PhI(OAc)2 and I2 in a CH2Cl2/AcOH mixed solvent is reported. The reaction was successfully applied to two types of carboxylic acids containing an α-quaternary and a benzylic ...
Kensuke Kiyokawa, Daichi Okumatsu, Satoshi Minakata   +2 more
doaj   +1 more source

Reversibility of the catalytic ketonization of carboxylic acids and of beta-keto acids decarboxylation

, 2018
Decarboxylation of beta-keto acids in enzymatic and heterogeneous catalysis has been considered in the literature as an irreversible reaction due to a large positive entropy change.
Andrew J. Cohen, Cohen, Andrew J., Ignatchenko, Alexey V., Alexey V. Ignatchenko   +3 more
core   +1 more source

Polyproline: A Synthetic Polypeptide With Unique Properties

Angewandte Chemie, EarlyView.
Poly‐L‐proline is a unique polypeptide distinguished by its well‐defined secondary structures and unusual thermal behavior. This mini review highlights recent advances in the synthesis of poly‐L‐proline by N‐carboxyanhydride (NCA) polymerization, the formation of structurally defined architectures and nanostructures, and emerging strategies that ...
Rosanna Le Scouarnec, Josué M. Galindo, Colin Bonduelle, Andreas Heise   +3 more
wiley   +1 more source

Editorial: Aminobiogenic potential of fermented food microbiota

Frontiers in Microbiology, 2023
Małgorzata Karwowska, Joanna Stadnik, Milena Brasca   +2 more
doaj   +1 more source

Switchable selectivity in Pd-catalyzed [3 + 2] annulations of γ-oxy-2-cycloalkenones with 3-oxoglutarates: C–C/C–C vs C–C/O–C bond formation

Beilstein Journal of Organic Chemistry, 2019
Two complementary [3 + 2] annulation protocols between 3-oxoglutarates and cyclic γ-oxy-2-cycloalkenones, simply differing on the reaction temperature, are disclosed.
Yang Liu, Julie Oble, Giovanni Poli
doaj   +1 more source