Results 71 to 80 of about 51,192 (201)

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

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

The Synthesis Use of a Difluorinated Amino‐Benzo‐Cinnoline Dyes (ABCDyes) Enables Fine Tuning of Emission Through Double SNAr Late‐Stage Functionalization

European Journal of Organic Chemistry, Volume 29, Issue 29, 7 August 2026.
An efficient synthesis of difluorinated amino‐benzo‐cinnoline dyes (ABCDyes) is reported. Their use for the late‐stage introduction of internal dinucleophilic species through a double SNAr reaction enables straightforward access to previously unexplored ABCDye analogs displaying tunable emission ranging from green to red.
Mélina Fabe, Narjis Ouazzani, Max Coehlo, Arnaud Chevalier   +3 more
wiley   +1 more source

Triphenylphosphine Catalysed Facile Multicomponent Synthesis of 2-Amino-3-Cyano-6-Methyl-4-Aryl-4H-Pyrans [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2017
Triphenyl phosphine(PPh3), an efficient and reusable catalyst, catalysed the synthesis of 2-amino-3-cyano-6-methyl-4-aryl-4H-pyran-5-ethylcarboxylate derivatives by one-pot condensation of aromatic aldehydes, malononitrile and ethyl acetoacetate in EtOH ...
Harikrishnan Ramadoss, Hamzeh Kiyani, Syed Sheik Mansoor   +2 more
doaj  

Chemoenzymatic Synthesis of Chiral Piperidines Using the Immobilized Transaminase ATA‐117 in Continuous Flow Reactors

Advanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.
A robust continuous flow chemoenzymatic process was developed for the stereoselective synthesis of cis‐(2R,6R)‐2,6‐disubstituted piperidines, including the natural alkaloid (–)‐pinidinone. The asymmetric transamination of α,β‐unsaturated ketones was catalyzed by immobilized ATA‐117, followed by spontaneous aza‐Michael cyclization, providing the desired
Sara Vicinanza, Ilaria Magrini Alunno, Stefania Patti, Morena Pirotta, Francesca Annunziata, Raffaella Gandolfi, Paola Conti, Chiara Borsari, Ivan Bassanini, Erica Elisa Ferrandi, Daniela Monti, Lucia Tamborini   +11 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  

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

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  

A novel biopolymer-based nanomagnetic catalyst for the synthesis of 4H-pyran and tetrahydro-4H-chromene derivatives [PDF]

, 2023
In the present study, we have designed and synthesized a new magnetically recoverable, nanocatalyst of Ag/Fe3O4@starch. The successful synthesis and the structure of the nanocatalyst were confirmed and evaluated with several analytical techniques ...
Mohammadzadeh, Amin, Marjania, Ahmad Poursattar, Zamani, Asghar   +2 more
core