Results 121 to 130 of about 57,264 (283)

Thiamine Diphosphate‐Dependent Biocatalysis in the 21st Century

open access: yesChemistry – A European Journal, EarlyView.
This account summarizes the major discoveries and recent advances, highlighting the biocatalytic abilities, mechanistic studies, and feature‐based classification that are shaping emerging perspectives on thiamine diphosphate (ThDP)‐dependent catalysis.
Lucrezia Lanza   +2 more
wiley   +1 more source

C‐Terminal Functionalization Methods of Amino Acids, Peptides, and Proteins

open access: yesChemistry – A European Journal, EarlyView.
C‐terminal functionalization offers powerful routes to peptide and protein diversification, yet epimerization, hydrolysis, and selectivity remain key challenges. This Review surveys enzymatic, decarboxylative, and condensation strategies, highlighting advances toward chemo‐ and regioselective, protecting‐group‐free, atom‐efficient methods applicable to
Jay Hanssens   +3 more
wiley   +1 more source

Micellar Influence on the Decarboxylation of the 2-Cyano-2-Phenylacetate Ion

open access: yes, 1996
Decarboxylation of the 2-cyano-2-phenylacetate ion in water is catalyzed by a number of cationic surfactants. The longer the surfactant's alkyl chain and the more hydrophobic its charged head, the greater is the surfactant's catalytic ability.
Edward W. Anacker   +2 more
core  

Synthesis of heterocycles based on azomethine ylides from α-amino acids (or amines) and carbonyl compounds

open access: yesBeilstein Journal of Organic Chemistry
This review focuses on new directions in (3 + 2) cycloaddition of azomethine ylides to alkenes, resulting in the formation of fused or spiro-fused pyrrolidine derivatives with multiple chiral centers under high regio- and stereocontrol.
Ekaterina V. Berezhnaya   +3 more
doaj   +1 more source

Microwave‐assisted catalytic pyrolysis of textile wastes: Synergistic effects and product characteristics

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study examines the microwave‐assisted catalytic pyrolysis (MACP) of individual and blended textiles (cotton, polyester, nylon 6) using ZnO and a ZnO/natural zeolite catalyst. In a custom‐built microwave reactor operated at 500°C, 1 kW power, and a 15‐min residence time, textile wastes were pyrolyzed.
Peyman Alizadeh   +3 more
wiley   +1 more source

Hydrogen donor‐assisted visbreaking of Canadian oil sands bitumen

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract High‐viscosity Canadian oil sands bitumen requires processing for efficient transportation and refining. Partial upgrading technologies, primarily based on thermal processing, can effectively reduce, or even eliminate, the use of costly diluent, increase bitumen quality and market value, potentially decrease greenhouse gas (GHG) emissions, and
Yi Zhang, Mohamed Ali, Jinwen Chen
wiley   +1 more source

Sustainable Hydrogen Production by Glycerol and Monosaccharides Catalytic Acceptorless Dehydrogenation (AD) in Homogeneous Phase

open access: yesChemSusChem, Volume 18, Issue 6, March 15, 2025.
Sustainable hydrogen production can be obtained from hydogen‐rich biomass‐derived organic molecules through Acceptorless Dehydrogenation (AD) reactions. Glycerol and sugars are available in large quantities from industry and can be successfully used as substrates in AD protocols, in the presence of tailored, selective, easily tunable and thermally ...
Sylwia Kostera, Luca Gonsalvi
wiley   +1 more source

MECHANISM OF DECARBOXYLATION OF PARA AMINO SALICYLIC ACID

open access: yes, 1985
The rate of decarboxylation of p-amino salicylic acid (PAS) in aqueous solutions was studied at 25° C (μ = 0.50) as a function of pH and buffer concentration.
Jivani, Shamim G.
core  

Coupling Selective Organic Oxidation With Hydrogen Evolution Over Metal Halide Perovskite Photocatalysts: Halide‐Dependent Design, Mechanisms, and Stability Challenges

open access: yesEcoEnergy, EarlyView.
This Review highlights how metal halide perovskites enable coupled selective organic oxidation and hydrogen evolution under visible light. It summarizes halide‐dependent design principles, surface engineering strategies, reaction mechanisms, and stability challenges, providing guidance for developing efficient and durable photocatalytic systems ...
Jutarat Jitrada   +4 more
wiley   +1 more source

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