Results 81 to 90 of about 12,662 (287)

Multi component one pot synthesis and characterization of derivatives of 2-amino-7,7- dimethyl-5-oxo-4-phenyl-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile and study of anti-microbial activity

Bulletin of the Chemical Society of Ethiopia, 2018
An efficient and convenient procedure has been described for one-pot multi-component synthesis of tetrahydrobenzo[b]pyrans known as 2-amino-7,7-dimethyl-5-oxo-4-phenyl-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile which can be obtained from the reaction ...
N. K. Rao, T. N. Rao, B. Parvatamma, K. P. Devi, S. C. Setty   +4 more
doaj   +1 more source

Electrospun Biomass‐Derived Flexible Anodes With Hierarchical Structure via Cobalt MOF Integration for Sodium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Hierarchically porous, N‐doped freestanding anode enables reversible Na+ insertion/desorption and Na–Co alloying, delivering fast kinetics, structural robustness, and durable sodium‐storage performance even under bending/folding. To develop a green, sustainable, and high‐performance anode for sodium‐ion batteries (SIBs), flexible biomass‐based carbon ...
Yuqiong He, Shengping Hou, Jie Liu, Shengbo Ge, Siqun Wang, Mashallah Rezakazemi, Feng Liang, Guanben Du, Kaimeng Xu   +8 more
wiley   +1 more source

Metal‐Free and Solvent‐Free CO2 Fixation Into Cyclic Carbonates Catalyzed by a Deferiprone‐Derived Bifunctional System

European Journal of Organic Chemistry, EarlyView.
A simple bifunctional organocatalyst derived from the FDA‐approved chelator deferiprone efficiently promotes CO2 fixation into cyclic carbonates. By combining epoxide activation and nucleophilic ring opening in a single scaffold, quantitative conversions are achieved under mild, metal‐free conditions. High activity, broad substrate scope, and excellent
Erika Saccullo, Luca Calantropo, Roberto Fiorenza, Pietro Nicotra, Antonio Rescifina, Vincenzo Patamia, Giuseppe Floresta   +6 more
wiley   +1 more source

Materials modeling and development for use in double-exposure lithography applications [PDF]

, 2009
The current optical photolithography technology is approaching the physical barrier to the minimum achievable feature size. To produce smaller devices, new resolution enhancement technologies must be developed.
Byers, Jeffrey, Jen, Kane, Lee, Saul, Turro, Nicholas J., Willson, C. Grant, Zimmerman, Paul   +5 more
core   +2 more sources

Phenolic Profiles, Antioxidant Properties and Predicted Glycaemic Index of Bread Sweetened With Date Syrup in Comparison With Granulated Sugar

Food Chemistry International, EarlyView.
Date syrup are used as sweetener in bread. Bread with date syrup had superior phenolic composition, better antioxidant properties and carbohydrate hydrolysing enzymes while bread with granulated sugar had higher predicted glyceamic index. The study concluded that date syrup could be the next though‐out ingredient for dual purpose in bread. ABSTRACT The
Akinsola Albert Famuwagun, Tijesuni Oloyede, Adebola Iyabode Akinjokun, Rachael Taiwo Babalola, Olamide Atinuke Idowu, Adedayo Adeboye, Oluseye Oladapo Abiona, Saka Olasunkanmi Gbadamosi   +7 more
wiley   +1 more source

Prins fluorination cyclisations: Preparation of 4-fluoro-pyran and -piperidine heterocycles

Beilstein Journal of Organic Chemistry, 2010
The Prins reaction was investigated using BF3·OEt2 as a Lewis acid. It has been recently demonstrated, that if BF3·OEt2 is used in stoichiometric amounts then these reactions generate fluorinated products where the BF3·OEt2 contributes fluoride ion to ...
Guillaume G. Launay, Alexandra M. Z. Slawin, David O'Hagan   +2 more
doaj   +1 more source

Photochromic carbazole photoinitiators for precision visible‐light photopolymerization

Polymer International, EarlyView.
New carbazole–naphthopyran derivatives were employed as visible‐light‐activated photoinitiators, enabling rapid and localized radical photopolymerization to produce well‐defined thin solid objects within minutes. Abstract Two carbazole derivatives, each incorporating a naphthopyran unit and an aromatic ketone, were synthesized and evaluated as ...
Mauro Magalhães, Céu M Sousa, José R Fernandes, Paulo J Coelho   +3 more
wiley   +1 more source

The continuing significance of chiral agrochemicals

Pest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Characterisation of Sex Pheromone and Genetic Strain in Rachiplusia nu (Lepidoptera: Noctuidae) Populations Across Brazil

Journal of Applied Entomology, EarlyView.
ABSTRACT Rachiplusia nu, known as the sunflower looper (SFL) and belonging to the Plusiinae subfamily, is a major defoliator of soybeans, sunflowers and other horticultural crops across southern South America. This species has recently expanded to central and northern regions of Brazil, becoming a key soybean pest.
Leonardo Figueiredo, Diego B. Silva, Alan V. Saldanha, Alberto S. Corrêa, Aluska T. dos Santos, Paulo H. G. Zarbin   +5 more
wiley   +1 more source

Synthesis of selected naturally occurring glucosides of volatile compounds. Their chromatographic and spectroscopic properties [PDF]

, 2004
Naturally occurring glucosides of benzyl alcohol, (+/-)-menthol, (+)-borneol, thymol, carvacrol and eugenol were synthesized by the Koenigs-Knorr-Zemplen method (yields 19.5-52.2%). Their beta-D-glucopyranosidic structures were determined by one- and two-
Džolić, Zoran, Jerković, Igor, Mastelić, Josip, Vikić-Topić, Dražen, Vinković, Marijana   +4 more
core   +1 more source