Results 51 to 60 of about 1,317 (206)
Beilstein Journal of Organic Chemistry, 2012 A mild, efficient and versatile method has been developed for the construction of a functionalized natural product, meridianin, and its post conversion to pyrimido-β-carboline by cationic π- cyclization. The strategy involves the introduction of an amino
Piyush K. Agarwal +3 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
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
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
Polyheterocyclic Systems Incorporating Pyrazole, Thiophene, Thiazole, and Thiadiazole Moieties.
ChemInform, 2003 AbstractFor Abstract see ChemInform Abstract in Full Text.
Kamal M. Dawood +2 more
openaire +1 more source
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
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
Molybdenum-Catalyzed Synthesis of Nitrogenated Polyheterocycles from Nitroarenes and Glycols with Reuse of Waste Reduction By-product [PDF]
, 2017 A novel domino reduction/imine formation/intramolecular cyclization/oxidation for the efficient synthesis of pyrrolo(indolo)[1,2-a]quinoxalines and pyrrolo(indolo)[3,2-c]-quinolines from readily available nitrobenzenes and glycols is reported.
Arnáiz García, Francisco Javier +4 more
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Chemistry – A European Journal, Volume 31, Issue 1, January 2, 2025.This review outlines and showcases how aminocatalytic dienamines and trienamines can be used in stereoselective cascade reactions, that are initiated by a cycloaddition reaction to rapidly access complex chiral molecules. We aspire that the chemical community can use this review to design new cascade reaction or use current methodologies in complex ...
Jonas Faghtmann +3 more
wiley +1 more source
ELECTROOPTICAL PROPERTIES OF THIN FILMS OF POLYHETEROCYCLES
Le Journal de Physique Colloques, 1983 Some conducting polyheterocycles prepared by electroinitiated polymerization as thin films on electrodes change color reversibly when they are electrochemically cycled. As an example, polypyrrole is synthetized in an oxidized form and may be reduced reversibly between 0 and - 0,7 volt vs SCE.
Gazard, M. +4 more
openaire +1 more source