Results 101 to 110 of about 9,019 (233)
Réarrangements sigmatropiques - Synthèse de cyclopropanes fonctionnalisés
, 2016 The cyclopropane ring is ubiquitous in natural and biologically active compounds. [3,3]-Sigmatropic rearrangements of cyclopropenylcarbinol derivatives have been developed to access functionalized alkylidenecyclopropanes, which are useful precursors of ...
Ernouf, Guillaume
core +1 more source
Nickel(II)-Catalyzed Formal [3+2] Cycloadditions between Indoles and Donor–Acceptor Cyclopropanes
MoleculesThis article describes the development of a nickel-catalyzed regio- and diastereoselective formal [3+2] cycloaddition between N-substituted indoles and donor–acceptor cyclopropanes to synthesize cyclopenta[b]indoles. Optimized reaction conditions provide
Víctor Quezada +9 more
doaj +1 more source
Molecules, 2013 A convenient microwave irradiation protocol was utilized for the synthesis of b-ketosulfones 1–5 in good yields. These sulfones reacted with alkenes through a radical oxidative cyclization mediated by Mn(OAc)3.
Patrice Vanelle +3 more
doaj +1 more source
Emerging Trends in Organic Photoreactions Utilizing Disulfides
European Journal of Organic Chemistry, Volume 29, Issue 21, 4 June 2026.Disulfides are versatile, nontoxic alternatives to metal photocatalysts. This review explores their role as photoactivated thiyl‐radical precursors and bifunctional catalysts (HAT/electron shuttling) in diverse transformations. Strategies for electronic tuning and development into recyclable heterogeneous materials are highlighted for sustainable ...
Sunil Kumar +3 more
wiley +1 more source
ChemPhotoChem, Volume 10, Issue 6, June 2026.This review surveys the literature on light‐driven dearomative [2+2] cycloadditions of indoles, highlighting their power to access complex cyclobuta[b]indole frameworks. Advances in photocatalysis, sensitizer design, and reaction engineering enable selective and sustainable assembly of strained three‐dimensional architectures, expanding opportunities ...
Maria Chiara Cabua +4 more
wiley +1 more source
Recent Advances in Intramolecular C─N Bond Formation for Pyrrolidine Synthesis
ChemistryOpen, Volume 15, Issue 6, June 2026.This review highlights synthetic advances (2013–2025) in intramolecular C─N bond formation for constructing the pharmaceutically relevant pyrrolidine core. The review is organized into five methodological clusters: 1) intramolecular alkene/alkyne amination; 2) tandem annulations, which involve C─N bond formation as the key step; 3) nucleophilic ...
Rasma Kroņkalne, Māris Turks
wiley +1 more source
Quantification of the electrophilic reactivities of nitroalkenes [PDF]
, 2012 While a large variety of nucleophiles (N and sN) have been characterized according to eq 1.3, the number of E parameters for electrophiles, and specifically for different classes of Michael acceptors remains relatively small.
Zenz, Ivo
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Synthesis and Reactivity of Bicyclo[3.2.1]octanoid-Derived Cyclopropanes
, 2016 Photochemical oxa-di-π-methane rearrangement of bicyclo[3.2.1]octanoid scaffolds affords multifunctional, donor–acceptor cyclopropanes. A related photochemical reaction of an iminium ether substrate uncovered an unprecedented aza-di-π-methane ...
John R. Goodell (1317582) +4 more
core +2 more sources
Divergent Synthesis of Polycyclic Derivatives via Gold Catalysis
European Journal of Organic Chemistry, Volume 29, Issue 20, 27 May 2026.Gold(I)‐catalyzed cycloisomerization enables the formation of complex 3D structures from simple enyne precursors. This study presents a divergent strategy to synthesize functionalized bicyclic and tricyclic scaffolds from a common alkynyl ketone.
Emilie Gentilini +4 more
wiley +1 more source
Studies in acceptor-acceptor-donor cyclopropanes
, 2014 Isolated from Spongosorites sp., Dragmacidin E is of synthetic interest due to its biological properties and novel molecular structure. A promising therapeutic target, its synthetic challenge is attributed to its heptacyclic core.
Reyes, Yahaira De Bary
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