Results 11 to 20 of about 4,131 (247)

Synthesis of polyfunctionalized dihydro-2-oxypyrroles catalyzed by 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) as a novel donor-acceptor fluorophore [PDF]

open access: yesScientific Reports, 2022
We developed a green radical synthesis method for polyfunctionalized dihydro-2-oxypyrroles based on the Michael–Mannich cyclocondensation of amines, dialkyl acetylenedicarboxylates, and formaldehyde.
Farzaneh Mohamadpour
doaj   +3 more sources

Gram-scale photosynthesis of polyfunctionalized dihydro-2-oxypyrroles using 3DPAFIPN as a halogenated dicyanobenzene-based photosensitizer via a consecutive visible-light-induced electron transfer process [PDF]

open access: yesFrontiers in Chemistry
BackgroundTypically, organic dyes show lower excited state lifetimes, a key hindrance in the development of efficient photoredox processes. Due to their distinctive qualities and efficiency, a particular class of organic chromophores has drawn ...
Farzaneh Mohamadpour, Ali Mohammad Amani
doaj   +3 more sources

A Modular Biosensor Platform for the Detection of Plastic Monomers and the Engineering of Promiscuous Amidases Toward Challenging Substrates [PDF]

open access: yesAdvanced Science
Stable chemical bonds dictate the properties of industrial chemicals and materials. Particularly the persistence of synthetic polymers like polyurethanes (PUs) contributes to the global issues of waste accumulation and environmental pollution.
Ina Somvilla   +12 more
doaj   +3 more sources

Efficient synthesis of polyfunctionalized carbazoles and pyrrolo[3,4-c]carbazoles via domino Diels–Alder reaction [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2021
The p-TsOH-catalyzed Diels–Alder reaction of 3-(indol-3-yl)maleimides with chalcone in toluene at 60 °C afforded two diastereoisomers of tetrahydropyrrolo[3,4-c]carbazoles, which can be dehydrogenated by DDQ oxidation in acetonitrile at room temperature ...
Ren-Jie Fang   +4 more
doaj   +3 more sources

Easy Access to Polyfunctionalized Chiral Decalins [PDF]

open access: yesACS Omega, 2020
An unexpected ring expansion that converts hydrindanes into decalins via an unprecedented dyotropic reaction involving a mesylate group has been observed, and this paved the way for easy access to polyfunctionalized chiral decalins. These polyfunctionalized chiral decalins can be very useful building blocks for the synthesis of the thia analogues of ...
Hugo Santalla   +4 more
doaj   +3 more sources

Polyfunctionalized α-Phenyl-tert-butyl(benzyl)nitrones: Multifunctional Antioxidants for Stroke Treatment

open access: yesAntioxidants, 2022
Nowadays, most stroke patients are treated exclusively with recombinant tissue plasminogen activator, a drug with serious side effects and limited therapeutic window. For this reason, and because of the known effects of oxidative stress on stroke, a more
Daniel Diez-Iriepa   +8 more
doaj   +2 more sources

Anomeric Amides: Valuable Reagents in Synthetic Organic Chemistry. [PDF]

open access: yesAngew Chem Int Ed Engl
Enabling late‐stage transformations and skeletal editing, anomeric amides have recently emerged as powerful synthetic tools. Due to their unique properties, anomeric amides have been employed in reactions ranging from amination to halogenation. This minireview provides an overview of recent progress in using anomeric amides across a variety of ...
Garg A, Vigier J, Lebel H, Besset T.
europepmc   +3 more sources

Synthesis of Polyfunctionalized 4H-Pyrans [PDF]

open access: yesJournal of Chemistry, 2013
Amberlyst A21 catalyzed one-pot three-component coupling of aldehyde and malononitrile with active methylene compounds such as acetylacetone and ethyl acetoacetate for the synthesis of pharmaceutically important polyfunctionalized 4H-pyrans has been ...
Manisha Bihani   +2 more
doaj   +2 more sources

Direct Access to Acylboranes via Formal Condensation of Carboxylic Acids with Ligated Boranes. [PDF]

open access: yesAngew Chem Int Ed Engl
A nickel‐catalyzed, radical‐based C(acyl)–B cross‐coupling strategy has been developed for the efficient synthesis of bench‐stable, phosphonite‐ligated acylborane compounds from readily available carboxylic acids. This methodology not only provides access to acylboranes with diverse reactivity profiles but also establishes a versatile platform for the ...
Cai CY   +5 more
europepmc   +3 more sources

Selective, Oxygen-Tunable, and Metal-Free Functionalization of Polyethylene Through Dual-Mode Nitrosation and Carbonylation. [PDF]

open access: yesAngew Chem Int Ed Engl
A metal‐free nitrosation process enables direct C–H functionalization of polyethylene (PE) with high selectivity, producing either oxime‐ or carbonyl‐functionalized polymers. Using t‐BuONO under visible light or thermal conditions, the process operates in both lab‐scale and industrial settings.
Cluzeau L   +4 more
europepmc   +3 more sources

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