Results 121 to 130 of about 48,446 (261)

On-surface and Subsurface Adsorption of Oxygen on Stepped Ag(210) and Ag(410) Surfaces

, 2003
The adsorption of atomic oxygen and its inclusion into subsurface sites on Ag(210) and Ag(410) surfaces have been investigated using density functional theory.
Baroni, S., Bonini, N., Corso, A. Dal, de Gironcoli, S., Kokalj, A.   +4 more
core   +2 more sources

Asymmetric Transformations of α,β‐Unsaturated Oxazolidinones Catalyzed by C2‐Symmetric Chiral Iron Triad Complexes

Advanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
This review highlights the evolution of highly enantioselective oxazolidinone transformations enabled by C2‐symmetric ligands, with emphasis on chiral iron triad complexes as cost‐effective, environmentally benign alternatives to late‐transition‐metal catalysts.
Arthur David, Thierry Ollevier
wiley   +1 more source

The In-Situ Epoxidation of Rubber Seed Oil (Hevea brasiliensis) by Peroxyacids

Engineering Proceedings
This paper adds to the sustainable materials field by in-situ epoxidation of rubber seed oil (RSO), a highly underutilized resource that has been sporadically used, using an optimized combination of 30% hydrogen peroxide and acetic/formic acid sulfuric ...
Eni Budiyati, Auliya Rahmah, Nur Ahmad Fauzi   +2 more
doaj   +1 more source

Selective Continuous‐Flow Syntheses of 1,2‐Diols From Alkenes by Utilizing a Dual Functionality of Titanium Silicalite‐1 Catalyst in the Presence of Hydrogen Peroxide Without Carboxylic Acids

Advanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
Various 1,2‐diols are synthesized from alkenes via a flow tandem reaction without using acids. This proceeds with high yield by utilizing the dual functionality of the titanium site in TS‐1 (peroxide formation and Lewis acidity). Selective syntheses of 1,2‐diols from alkenes have traditionally relied on carboxylic acids and various oxidants, which ...
Yoshihiro Kon, Takuya Nakashima, Hiroki Nagashima, Yoshiki Makino, Syun‐ya Onozawa, Hiroyuki Miyamura, Shū Kobayashi   +6 more
wiley   +1 more source

Anxiolytic and Memory Protective Effects of Withanolide D Isolated From Acnistus arborescens in Adult Zebrafish

Chemistry &Biodiversity, Volume 23, Issue 5, May 2026.
Withanolide D Exhibits Anxiolytic and Memory‐Protective Effects. ABSTRACT This study evaluated the anxiolytic and memory‐protective effects of withanolide D in adult zebrafish (Danio rerio). The compound was administered at doses of 4, 20, and 40 mg/kg and showed no signs of toxicity after 96 h of observation at any of the doses tested.
Cléia Rocha de Sousa Feitosa, Joilna Alves Da Silva, Jéssica Bezerra Maciel, Ivana Carneiro Romão, Thais Rocha Cavalcante, Francisco Anderson Nascimento Barros, Nicole de Abreu Bandeira, Emmanuel Silva Marinho, Jane Eire Silva Alencar De Menezes, Maria Kueirislene Amâncio Ferreira, Antonio Wlisses Da Silva, Márcia Machado Marinho, Matheus Nunes Da Rocha, Otília Deusdênia Loiola Pessoa, Pedro Henrique Jatai Batista, Andreia Ferreira De Castro Gomes, Alexandre Magno Rodrigues Teixeira, Hélcio Silva Dos Santos   +17 more
wiley   +1 more source

Manganese Porphyrin‐Catalyzed One‐Pot Oxidation of Lupeol: Efficient Conversion of Its Terminal Alkene Into Carboxylic Acids

Chemistry &Biodiversity, Volume 23, Issue 5, May 2026.
Manganese porphyrin catalyst enables green PhI(OAc)2 oxidation of lupeol in ethyl acetate, achieving 94% conversion and the formation of eight products, including selective C20 olefin transformations and one‐pot conversion of the isopropenyl group to carboxylic acids, all without the need of C3‐OH protection step.
Leila Renan Oliveira, Pedro Fonseca‐Pinheiro, Lucienir Pains Duarte, Diogo Montes Vidal, Grasiely Faria de Sousa, Dayse Carvalho da Silva Martins   +5 more
wiley   +1 more source

Desulfurization of Benzothiophene Derivatives by Solvent Extraction Coupled With Oxidation Using Oxomolybdenum(VI) Bis(pyrazolyl)methane Catalysts

European Journal of Inorganic Chemistry, Volume 29, Issue 13, 1 May 2026.
A polymeric hybrid material formulated as [MoO3(bis(pyrazolyl)methane)] has been prepared and used as a catalyst precursor for the complete oxidative desulfurization of a model diesel containing recalcitrant benzothiophene derivatives. The precursor is converted in situ to an oxodiperoxo active species which is retained in the recyclable extractant ...
Ana C. Gomes, Fátima Mirante, Isabel S. Gonçalves, Martyn Pillinger, Salete S. Balula   +4 more
wiley   +1 more source

Chemical Upcycling of Nitrile Butadiene Rubbers to Polyamines and Polyols by Chemoselective Catalytic Hydrogenation

Angewandte Chemie, Volume 138, Issue 18, 27 April 2026.
We demonstrate here the transformation of NBR (Nitrile butadiene rubber) including post‐consumer waste sourced from nitrile gloves and o‐rings into polyamines and polyols via ruthenium catalyzed hydrogenation. ABSTRACT We report here two new approaches for the chemical recycling/upcycling of nitrile butadiene rubber (NBR) to make either polyamines or ...
Alejandra Sophia Lozano Perez, Raymundo Marcial‐Hernandez, Harini Sampathkumar, Oluchi Emenike, Ketan Pancholi, Claire N. Brodie, Daniel M. Dawson, Amit Kumar   +7 more
wiley   +2 more sources

Homoisoflavonoids—From Natural Specificity and Biosynthesis to Precision Health‐Promoting Mechanisms

Food Frontiers, Volume 7, Issue 3, May 2026.
Homoisoflavonoids are rare flavonoids with a unique bi‐aromatic oxygen‐heterocyclic structure. This review synthesizes their structure–activity relationships in anti‐inflammatory, hypoglycemic, and anticancer contexts. By highlighting their specific natural distribution and outlining biosynthetic pathways, it provides a conceptual framework and ...
Jing Zhang, Han Chen, Jinping Si, Zhigang Han, Xinfeng Zhang   +4 more
wiley   +1 more source

Rhodium‐Catalyzed Regioselective Addition of N‐Hydroxyl Imides to Internal Alkynes

Israel Journal of Chemistry, Volume 66, Issue 3, May 2026.
An intermolecular rhodium‐catalyzed regioselective addition of N‐hydroxyl imides to internal alkynes leads to branched O‐allyl compounds, which can be readily transformed to allylic alcohols and O‐allyl hydroxylamines after deprotection. Isotopic labelling experiments suggest a plausible reaction mechanism.
Zi Liu, Bernhard Breit
wiley   +1 more source