Results 131 to 140 of about 81,314 (317)

Decarboxylation of Substituted Sodium Phenylpropiolates

open access: yes, 1961
The kinetics of the thermal decarboxylation of a series of substituted sodium phenylpropiolates were studied in detail. The reaction proceeded without formation of significant amounts of side products: its rate was independent of hydrogen ion ...
Wong, Edward
core   +1 more source

Nitrooxylation in Organic Synthesis: From Classical Nitrate Ester Formation to Modern Catalytic Strategies

open access: yesChemistry – A European Journal, EarlyView.
Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley   +1 more source

The Correlation between Amino Acids and Biogenic Amines in Wines without Added Sulfur Dioxide

open access: yesFermentation
In classical methods of wine production, amino acids play a critical role, as they are fundamental to all types of fermentation. Beyond their consumption in fermentative processes, amino acids undergo several transformations, such as decarboxylation ...
Sorin Macoviciuc   +4 more
doaj   +1 more source

Parameters Governing Ruthenium Sawhorse-Based Decarboxylation of Oleic Acid

open access: yes, 2017
Ruthenium-catalyzed decarboxylation of 9-cis-octadecenoic is a path to produce biobased olefins. Here, a mechanistic study of this reaction was undertaken utilizing a closed reaction system and a pressure reactor.
Rex E. Murray (3681940)   +6 more
core   +1 more source

A Selectfluor‐based Polonovski Rearrangement Leading to Novel Entities for Synthetic and Medicinal Applications

open access: yesChemistry – A European Journal, EarlyView.
Starting from carboxylic acids and Selectfluor‐derivatives, functionalized diazabicyclooctanes can be obtained via a novel Polonovski‐type rearrangement proceeding under mild reaction conditions. Besides their use in organic synthesis the unique structure and reactivity of the rearrangement products enables applications in medicinal chemistry ...
Jakob Kuhn   +5 more
wiley   +1 more source

Decarboxylative photocatalytic transformations

open access: yesChemical Society Reviews
Photocatalytic decarboxylation of carboxylic acids or their redox active esters has become an important strategy in organic chemistry.
Francisco Foubelo   +5 more
openaire   +2 more sources

Oxidation of Allylic Alcohols by Manganese Oxides: Elucidating the Influences of MnOx Structure and Mn Oxidation State on Reactivity

open access: yesChemistry – A European Journal, EarlyView.
Manganese oxides (MnOX) of different structures and with different Mn oxidation states exhibit significant variation in their reactivity toward the oxidation of allylic alcohols. Using two allylic alcohol model substrates, we demonstrate the relationship between activity and MnOX structure, Mn4+ content and incorporated secondary cations.
Erdogan Kasisari   +6 more
wiley   +1 more source

Decarboxylation-Driven Double Annulations: Innovative Multi-Component Reaction Pathways

open access: yesMolecules
A concerted five-component reaction strategy has been developed, featuring double [3+2] cycloadditions utilizing aspartic acid. This approach provides valuable insights into mechanistic pathways, allowing for the distinction between concerted and ...
Desheng Zhan   +4 more
doaj   +1 more source

Mechanistic Insights Into Sustainable Catalytic Pyrolysis of Biomass‐Derived Ferulic Acid: The Role of Alumina Regeneration

open access: yesChemistry – A European Journal, EarlyView.
Surface‐bound ferulate phenolate complexes undergo styrene‐like polymerization on alumina, yielding a polymeric carbonaceous layer that progressively transforms into polyaromatic carbon domains with concomitant release of aromatic products, while parallel surface‐assisted decarboxylation produces 4‐vinylguaiacol. ABSTRACT A fundamental understanding of
Tetiana V. Kulik   +11 more
wiley   +1 more source

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

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