Results 71 to 80 of about 39,305 (203)

Easy Electrochemical Synthesis of 2-amino-4-aryl-3-cyano-5-ethoxycar-bonyl-6-methyl-4H-pyrans in the Absence of Supporting Electrolyte

, 2008
An easy electrochemical synthesis of 2-amino-4-aryl-3-cyano-5-ethoxycarbonyl-6-methyl-4H-pyrans has been set up, by galvanostatic electrolysis of a mixture of arylidenemalononitrile and ethyl acetoacetate in the absence of supporting electrolyte.
Giovanni Sotgiu, SOTGIU, Giovanni
core   +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, Volume 29, Issue 20, 27 May 2026.
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

Macrophage Membrane‐Cloaked, ROS‐Triggered Quercetin Nanocarriers Target Ovarian Lesions to Treat Polycystic Ovary Syndrome

Advanced Healthcare Materials, Volume 15, Issue 17, 8 May 2026.
The synthesis process of MM@PCD@QNPs and its potential mechanism for treating PCOS. (A) Assembly steps of MM@PCD@QNPs. (B) Synthesis and decomposition of MM@PCD@QNPs. (C) Potential therapeutic mechanisms of MM@PCD@QNPs for PCOS. PCD, PABP conjugated with DEX polymer; QUR, quercetin; CDI, N, N′‐carbonyldiimidazole; DEX, dextran; PABP, 4‐(hydroxymethyl ...
Wenzhu Li, Yu Guan, Nan Song, Feng Zhang, Zhimin Deng, Tailang Yin, Yanbing Yang, João Conde, Wenyi Jin, Zhinang Yin   +9 more
wiley   +1 more source

Meglumine: A Novel and Efficient Catalyst for One-Pot, Three-Component Combinatorial Synthesis of Functionalized 2‑Amino‑4H‑pyrans

, 2016
An efficient one-pot synthesis of functionalized 2-amino-4H-pyrans by a meglumine-catalyzed three-component reaction has been developed. A broad range of substrates including aromatic and heteroaromatic aldehydes, isatin derivatives, and ...
Rui-Zhi Wang (1887556), Rui-Yun Guo (1887565), Zhi-Min An (1887559), Shu-Xia Wang (1887562), Li-Ping Mo (1887553), Hong-Xia Liu (291611), Zhan-Hui Zhang (460867)   +6 more
core   +1 more source

Oral History Interview: 4H Youth Professionals (1566)

, 2016
4H Youth ProfessionalsIn this 2016 interview, Harv Thompson interviews a group of 4H educators, Linda Kutska, Susan Farmer, Kathy Voss, and Christina Rencontre, about their careers in continuing education arts programs at the University of Wisconsin ...
4H Youth Professionals
core  

Efficient Synthesis of 2-Amino-4H-benzo[b] pyrans via Copper-periodic Mesoporous Organosilica Nanocomposites Catalyst in Aqueous Media

Acta Chimica Slovenica
In this study, the efficient method was introduced for the preparation of copper-periodic mesoporous organosilica nanocomposites (Cu@MOS NCs) as a high performance heterogeneous nanocatalyst. Then the nanocomposite was characterized with various methods
Roghaye Ramazannejad lori, Zahra Fahimeh Alsadat Mortazavi, Vajihe Nejadshafiee, Asadollah Hassankhani   +3 more
doaj   +1 more source

Tervetuloa töihin: Kankaanpään 4H- yhdistyksen työpalvelu ja kerhonohjaus- perehdytysopas

, 2021
Toiminnallisen opinnäytetyön tavoitteena oli laatia perehdytysopas Kankaanpään 4H yhdistyksen työpalveluun työllistyviä ja kerhonohjaaja- toimintaan osallistuvia nuoria varten.
Lamminmäki, Anu
core  

Gold(I)-catalysed one-pot synthesis of chromans using allylic alcohols and phenols [PDF]

, 2013
A gold(I)-catalysed reaction of allylic alcohols and phenols produces chromans regioselectively via a one-pot Friedel–Crafts allylation/intramolecular hydroalkoxylation sequence.
Barker, Graeme, Eloi Coutant, Lee, Ai-Lan, Coutant, Eloi, Paul C. Young, Ai-Lan Lee, Young, Paul C, Graeme Barker   +7 more
core   +1 more source

"Jos vaikka sais vaikuttaa siihen, mitä tehhää kerhossa" : Lapsilähtöisyyden lisääminen 4H-kerhotoiminnassa [PDF]

, 2019
Opinnäytetyön tarkoituksena oli tuottaa tietoa siitä, kuinka Etelä-Saimaan 4H-kerhojen toimintaa voisi kehittää lapsilähtöisemmäksi Lappeenrannan alueella.
Udd, Anni, Laamanen, Ronja
core  

Iron(III)-Catalyzed Prins-Type Cyclization Using Homopropargylic Alcohol:  A Method for the Synthesis of 2-Alkyl-4-halo-5,6-dihydro-2H-pyrans

, 2016
A new Prins-type cyclization between homopropargylic alcohol and aldehydes in the presence of FeX3 to obtain 2-alkyl-4-halo-5,6-dihydro-2H-pyrans in good yield is described.
Pedro O. Miranda (2397970), Juan I. Padrón (2440633), Jaime Bermejo (2400757), David D. Díaz (2531212), Victor S. Martín (3037980)   +4 more
core   +1 more source