Results 51 to 60 of about 916 (181)
Ortho‐Quinone Methide Driven Synthesis of New O,N‐ or N,N‐Heterocycles
ChemistryOpen, 2019 To synthesize functionalized Mannich bases that can serve two different types of ortho‐quinone methide (o‐QM) intermediates, 2‐naphthol and 6‐hydroxyquinoline were reacted with salicylic aldehyde in the presence of morpholine.
Dr. István Szatmári +5 more
doaj +1 more source
Advanced Synthesis &Catalysis, Volume 367, Issue 9, May 6, 2025.Abstract A molybdenum‐catalyzed deoxygenation of sulfoxides, pyridine and quinoline N‐oxides, N‐hydroxybenzotriazoles, as well as the reduction of nitroarenes to anilines, has been developed using monocyclic terpenes such as γ‐terpinene as an environmentally benign hydrogen surrogate.
Raquel Hernández‐Ruiz +4 more
wiley +1 more source
Synthesis and optoelectronic properties of new ethynylated pyrazine derivatives [PDF]
, 2003 Several diaryleneethynylpyrazine derivatives, in which the pyrazine unit is electron-deficient, have been synthesised using Sonogashira palladium-catalysed cross-coupling reactions.
Zhao, Liang
core
Helvetica Chimica Acta, Volume 108, Issue 5, May 2025.Abstract Carbonyl‐tethered alkylidenecyclopropanes can react with aryl isocyanates in presence of Pd(0)‐phosphoramidite catalysts to give seven‐membered heterobicyclic products in a formal [3+2+2] cycloaddition process. The reaction involves the formation of a palladium π‐allyl complex intermediate (A), which behaves as a formal 1,5‐dipole, and can be ...
Ricardo Rodiño +2 more
wiley +1 more source
Advanced Synthesis &Catalysis, Volume 367, Issue 6, March 18, 2025.Abstract The synthesis of architecturally complex polyheterocyclic structures embedding the indole ring represents a growing field of interest. Carbolines and their partially dehydro derivatives, pyrazinoindoles, indoloindoles, azepinoindoles and other medium‐sized derivatives are only some examples of indole‐containing polycyclic compounds featured by
Alessandro Palmieri, Marino Petrini
wiley +1 more source
New cyclic oligothiophenes and their co-oligomers derivatives ofmolecular engineering interest
, 2014 International audienceThe electronic properties of several series of bridged oligomers and their co-oligomers derivatives of five-membered biheterocycles (bithiophene, bipyrrole, bifuran bridged by CO or CS group) in their linear and cyclic structures ...
Benmensour, Mohammed Ali +2 more
core +4 more sources
Molybdenum‐Catalyzed Direct Synthesis of Pyrroles from Nitroarenes with Glycols as Reductants
Advanced Synthesis &Catalysis, Volume 367, Issue 4, February 18, 2025.Abstract A molybdenum‐catalyzed synthesis of N‐(hetero)aryl pyrroles directly from inexpensive and commonly available (hetero)nitroarenes via reduction with pinacol and annulation with 1,4‐dicarbonyls or cyclobutane‐1,2‐diols has been described. The process does not require an inert atmosphere and tolerates the presence of air and water. This non‐noble
Sara Gómez‐Gil +3 more
wiley +1 more source
Conjugated polymers: Synthesis and applications in optoelectronics [PDF]
, 2014 In the last 50 years the development of conjugated polymers for applications in optoelectronics and energy has attracted great interest because of its use as conductive polymers, in solar cells or electronic devices.
Anguera, Gonzalo +1 more
core
Synthesis of Heterocyclic Fused [1,5]naphthyridines by Intramolecular HDA Reactions [PDF]
, 2019 Povarov reaction [1] can be considered as an example of HDA reactions and represents an excellent method for the preparation of nitrogen-containing heterocyclic compounds [2].
Alonso Pérez, Concepción Estibaliz +3 more
core +1 more source
Photoassisted access to complex polyheterocycles containing a β-lactam moiety [PDF]
Journal of Photochemistry and Photobiology A: Chemistry, 2016 Intramolecular cycloadditions of aza-o-xylylenes generated via excited state intramolecular proton transfer (ESIPT) to furanacetic acid-based unsaturated pendants was shown to overcome the unfavorable energetics of the azetidinone ring formation, offering rapid access to β-lactams as primary photoproducts.
Weston J. Umstead +2 more
openaire +2 more sources