Results 61 to 70 of about 1,953 (209)

One-pot and metal-free synthesis of 3-arylated-4-nitrophenols via polyfunctionalized cyclohexanones from β-nitrostyrenes

open access: yesBeilstein Journal of Organic Chemistry, 2020
β-Nitrostyrenes underwent a Diels–Alder reaction with Danishefsky’s diene to afford cyclohexenes together with the corresponding hydrolyzed products, 3-arylated-5-methoxy-4-nitrocyclohexanones.
Haruyasu Asahara   +2 more
doaj   +1 more source

POLYFUNCTIONALITY OF THE TERM IN MODERN TERMINOLOGY

open access: yesMESSENGER of Kyiv National Linguistic University. Series Philology, 2022
In the present paper, we characterize a term as a multifunctional phenomenon and define the system of its functions that is quite complicated, and even more complex than the corresponding system of a non-term (commonly used word). For instance, any term performs the sign function.
openaire   +2 more sources

Alkoxyallenes in Modern Synthesis: Reactivity, Catalysis, and Complexity Generation

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 17, 1 September 2026.
The last decade has witnessed a remarkable transformation in alkoxyallene chemistry. Although historically employed as synthetic equivalents of acrolein or as versatile 3C synthons, alkoxyallenes are now increasingly recognized as highly adaptable platforms for synthetic design.
A. Lanfranco   +5 more
wiley   +1 more source

A New Valuable Synthesis of Polyfunctionalized Furans Starting from β-Nitroenones and Active Methylene Compounds [PDF]

open access: yes, 2019
Highly functionalized furans are the key scaffolds of many pharmaceuticals and bioactive natural products. Herein, we disclose a new fruitful synthesis of polyfunctionalized furans starting from beta-nitroenones and alpha-functionalized ketones.
Serena Gabrielli   +3 more
core   +1 more source

Synthesis of 3,5‐Diarylated 4‐Cyano‐2‐nitrophenols via Nitro Rearrangement

open access: yesAsian Journal of Organic Chemistry, Volume 15, Issue 9, September 2026.
A practical synthetic route to 3,5‐diaryl‐4‐cyano‐2‐nitrophenols, a class of unsymmetrically substituted and densely functionalized phenols, is provided. The key transformation is a nitro rearrangement of 4‐cyano‐4‐nitrocyclohexanone derivatives, which were prepared from di(benzylidene)acetones through cyano(nitro)methylation.
Nagatoshi Nishiwaki   +3 more
wiley   +1 more source

Unusual ring transformation of N-hydroxy-3,5-dinitro-4-pyridone Affording a polyfunctionalized pyrrole

open access: yes, 2008
Polyfunctionalized pyrrole 6 is synthesized in the ring transformation of N-hydroxy-3,5-dinitro4-pyridone 4 with enolate 2 derived from diethyl 3-oxogulutarate. The present reaction proceeds with C-N transfer from 4 to 2, which is hitherto unknown manner
NISHIWAKI, Nagatoshi   +6 more
core   +1 more source

Controllable Chemodivergent Synthesis of α‐Trifluoromethyl Boronates and gem‐Difluoroalkenyl Boronates via Photoredox 1,2‐Boron Migratory Carbonylation

open access: yesChinese Journal of Chemistry, Volume 44, Issue 17, Page 2918-2926, 1 September 2026.
We have developed a visible‐light‐driven, transition‐metal‐free protocol for the chemodivergent borocarbonylation of trifluoromethyl styrenes which integrates radical 1,2‐boron migration, CO trapping, and intermolecular C–C bond formation into a single multicomponent cascade.
Xiao‐Fan Cui   +2 more
wiley   +1 more source

Polyfunctionality and inflectional economy

open access: yesLinguistic Issues in Language Technology, 2014
This paper serves two purposes. It is a summary of much work concerning One compelling kind of evidence for the autonomy of a language’s morphology is the incidence of inflectional polyfunctionality, the systematic use of the same morphology to express distinct but related morphosyntactic content.
openaire   +2 more sources

Noninnocent Deep Eutectic Solvents Enable Selective, Sustainable Nickel‐Catalyzed Cross‐Electrophile Couplings to Diarylmethanes

open access: yesChemSusChem, Volume 19, Issue 16, 27 August 2026.
Ni‐catalyzed cross‐electrophile coupling (XEC) of aryl iodides with benzyl chlorides proceeds efficiently in the deep eutectic solvent (DES) choline chloride/urea, replacing hazardous amide solvents. Under mild, aerobic, heterogeneous conditions, diarylmethanes form in up to 95% yield.
Andrea Nicola Paparella   +7 more
wiley   +1 more source

Convenient Synthesis of Polyfunctionalized β-Fluoropyrroles from Rhodium(II)-Catalyzed Intramolecular N−H Insertion Reactions

open access: yes, 2016
Polyfunctionalized β-fluoropyrrole can be readily prepared from rhodium(II) acetate-catalyzed intramolecular N−H insertion reaction of δ-amino-γ,γ-difluoro-α-diazo-β-ketoesters.
Shizheng Zhu (1963603)   +1 more
core   +1 more source

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