Results 1 to 10 of about 11,118 (177)

Isocoumarin Synthesis via Metal-Free C-Arylation of Acetoacetates with ortho-Ester-Functionalized Diaryliodonium Salts [PDF]

Molecules
In this study, a metal-free approach was developed for the synthesis of isocoumarin frameworks by exploiting the reactivity between ortho-carboxylate-ester-substituted diaryliodonium salts and acetoacetates.
Elghareeb E. Elboray, Daichi Kashiwagi, Kotaro Kikushima, Mihoyo Fujitake, Toshifumi Dohi   +4 more
doaj   +2 more sources

Comparison of two diagnostic methods through blood and urine sample analyses for the detection of ketosis in cattle [PDF]

Veterinary World, 2022
Background and Aim: Several Ecuadorian farms use human test strips (cheaper than veterinary strips) to diagnose bovine ketosis; however, their reliability is unknown. This study aimed to determine the confidence level of human strips for the detection of
Karla Verónica Borja, Andrés Miguel Amador, Silvana Hipatia Santander Parra, Cristian Fernando Cárdenas, Luis Fabian Núñez   +4 more
doaj   +1 more source

Synthesis and investigation of solvent effects on the ultraviolet absorption spectra of 5-substituted-4-methyl-3-cyano-6-hydroxy-2-pyridones [PDF]

Journal of the Serbian Chemical Society, 2001
A number of 5-substituted-4-methyl-3-cyano-6-hydroxy-2-pyridones from cyanoacetamide and the corresponding alkyl ethyl acetoacetates were synthesized according to modified literature procedures. The alkyl ethyl acetoacetates were obtained by the
Mijin Dušan Ž., Ušćumlić Gordana S., Valentić Nataša V.   +2 more
doaj   +3 more sources

Wood pulp industry by-product valorization for acrylate synthesis and bio-based polymer development via Michael addition reaction

Journal of Bioresources and Bioproducts, 2023
It is crucial to adapt the processing of forest bio-resources into biochemicals and bio-based advanced materials in order to transform the current economic climate into a greener economy.
Ralfs Pomilovskis, Eliza Kaulina, Inese Mierina, Arnis Abolins, Olga Kockova, Anda Fridrihsone, Mikelis Kirpluks   +6 more
doaj   +1 more source

Elevated blood acetoacetate levels reduce major adverse cardiac and cerebrovascular events risk in acute myocardial infarction

Open Medicine, 2023
Although elevated blood ketone body levels reduce major adverse cardiac and cerebrovascular events (MACCEs) risk in chronic heart failure, their relationship with acute myocardial infarction remains unknown.
Sato Jun, Kinoshita Kosaku, Sakurai Atsushi   +2 more
doaj   +1 more source

Ultrasound-assisted aqua-mediated synthesis of multi-substituted tetrahydropyridine-3-carboxylates using N-carboxymethyl-3-pyridinium hydrogensulfate ([N-CH2CO2H-3-pic]+HSO4 −) as a new efficient ionic liquid catalyst

SN Applied Sciences, 2021
A simple, straightforward, and ultrasound-promoted method for the preparation of some highly functionalized tetrahydropyridines reported via pseudo five-component reaction of (hetero)aromatic aldehydes, different anilines, and alkyl acetoacetates in the ...
Kobra Nikoofar, Fatemeh Shahriyari
doaj   +1 more source

Catalytic activity of TiO2 nanoparticles in cyclization reactions for pyrazolone formation: DNA binding analysis via spectroscopy, X-ray crystallography, and molecular docking

Journal of Saudi Chemical Society
This method of sustainable synthesis utilizes a range of aromatic/heterocyclic aldehydes, phenylhydrazine, and ethyl acetoacetates. The TiO2 nanoparticle catalyst facilitates cyclization reactions, yielding pyrazolone derivatives with exceptional ...
Mehtab Parveen, Uzma, Mohammad Azam, Mohammad Azeem, Afroz Aslam, Masrat Bashir, Mahboob Alam   +6 more
doaj   +1 more source

Closed-loop Recycling of Vinylogous Urethane Vitrimers.

Angewandte Chemie, 2023
Devising energy-efficient strategies for the depolymerization of plastics and the recovery of their structural components in high yield and purity is key to a circular plastics economy. Here, we report a case study in which we demonstrate that vinylogous
Youwei Ma, Xuesong Jiang, Zixing Shi, J. Berrocal, C. Weder   +4 more
semanticscholar   +1 more source

Mikrobiologische Umwandlung von Silicium-Yerbindungen: Enantioselektive Reduktion von Acetessigsäure-(trimethylsilylalkyl)estern und deren Carba-Analoga/ Microbiological Transformation of Silicon Compounds: Enantioselective Reduction of Trimethylsilylalkyl Acetoacetates and their Carba-Analogues

, 1983
The trimethylsilylalkyl acetoacetates 1 b and 2 b as well as their carba analogues 1 a and 2 a have been reduced microbiologically by Kloeckera corticis (ATCC 20109), leading to the corresponding ( + )-3(S)-hydroxybutanoates 3b, 4b, 3a, and 4a.
R. Tacke, H. Linoh, B. Stumpf, W. Abraham, K. Kieslich, L. Ernst   +5 more
semanticscholar   +1 more source

Rapeseed Oil as Feedstock for Bio-Based Thermoset Foams Obtained via Michael Addition Reaction. [PDF]

Polymers (Basel), 2023
Kirpluks M, Abolins A, Eihe D, Pomilovskis R, Fridrihsone A.   +4 more
europepmc   +1 more source