Results 31 to 40 of about 424,465 (437)

N-Heterocyclic Carbene-Catalyzed Decarboxylative Alkylation of Aldehydes.

open access: yesJournal of the American Chemical Society, 2019
We found that N-heterocyclic carbene catalysis promoted the unprecedented decarboxylative coupling of aryl aldehydes and tertiary or secondary alkyl carboxylic acid-derived redox-active esters to produce aryl alkyl ketones.
T. Ishii   +3 more
semanticscholar   +1 more source

Reactive organoallyl species generated from aryl halides and allene: allylation of alpha,beta-unsaturated aldehydes and cyclic ketones employing Pd/In transmetallation processes [PDF]

open access: yes, 2008
Allylation of α,β-unsaturated aldehydes and cyclic ketones promoted by Pd/In transmetallation processes has been studied. The unsaturated aldehydes underwent regioselective 1,2-addition to afford secondary homoally alcohols.
Anwar   +56 more
core   +2 more sources

Study of the relationship between oxidation kinetics and deterioration of sensory characteristics of vegetable oils

open access: yesВісник аграрної науки Причорномор'я, 2021
The oil and fat industry is a branch whose development is rapidly gaining momentum in the food industry of Ukraine. However, it is currently facing new challenges that require solutions at the expense of both increasing production volumes and finding new
A. Demydova
doaj   +1 more source

Vertical distribution of aldehydes and phytoplankton structure: a case study of urban lake [PDF]

open access: yesArchives of Environmental Protection, 2020
In water systems, both biologically and chemically synthesized molecules may reduce environmental quality and influence essential ecosystems structure and function.
Elżbieta Szeląg-Wasielewska   +1 more
doaj   +1 more source

Contribuições recentes da reação de hidroformilação na síntese de produtos farmacêuticos: parte II Current improvement to the synthesis of pharmaceuticals by hydrofor-mylation reaction: part II

open access: yesQuímica Nova, 1997
The hydroformylation reaction represents one of the most important C1-chemistry area in the chemical industry. This catalytic process, which has been developed up to now mainly to the production of commodities chemicals, has shown a remarkable potential ...
Carlo Botteghi   +2 more
doaj   +1 more source

Lipid-Derived Aldehydes: New Key Mediators of Plant Growth and Stress Responses

open access: yesBiology, 2022
Aldehydes, derivatives of lipids, are ubiquitously produced through non-enzymatic and enzymatic pathways in higher plants and participate in many physiological and biological processes.
Xin Liang   +5 more
doaj   +1 more source

Interaction of Amines with Ketone Aldehydes and Unsaturated Aldehydes [PDF]

open access: yesProceedings of the National Academy of Sciences, 1973
The optical changes occurring during the interaction of amines with ketone aldehydes or unsaturated aldehydes are accompanied by strong electron spin resonance signals, and can thus be explained as due to the transfer of one whole electron in the ground state.
Albert Szent-Györgyi, Hideo Kon
openaire   +3 more sources

Alkenylation and Allylation of Aldehydes by Using an Ni/Cr/TDAE Redox System [PDF]

open access: yes, 2001
In 360 females, Bone mineral density (BMD) in lumbar vertebrae (L2-L4) was assessed by quantitative computed tomography (QCT), and the values obtained were compared with the frequency of vertebral transformation or fracture as assessed by lateral scan ...
Goto, Kentaro   +4 more
core   +1 more source

Exhaled Aldehydes as Biomarkers for Lung Diseases: A Narrative Review

open access: yesMolecules, 2022
Breath analysis provides great potential as a fast and non-invasive diagnostic tool for several diseases. Straight-chain aliphatic aldehydes were repeatedly detected in the breath of patients suffering from lung diseases using a variety of methods, such ...
Maximilian Alexander Floss   +5 more
doaj   +1 more source

Gas phase hydration, bond dissociation enthalpies, and acidity of aldehydes: A CBS-Q//B3, G4MP2, and G4 theoretical study of substituent effects [PDF]

open access: yes, 2010
CBS-Q//B3, G4MP2, and G4 composite method calculations were used to estimate gas phase standard state (298.15 K, 1 atm) free energies of hydration (Δ~hydr~G°~(g)~), hydration equilibrium constants (log K~hydr,(g)~), bond dissociation ...
Kaya Forest, Sierra Rayne
core   +2 more sources

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