Results 21 to 30 of about 23,082 (272)
Fused 1,5-Naphthyridines: Synthetic Tools and Applications
Molecules, 2020 Heterocyclic nitrogen compounds, including fused 1,5-naphthyridines, have versatile applications in the fields of synthetic organic chemistry and play an important role in the field of medicinal chemistry, as many of them have a wide range of biological ...
Carme Masdeu +6 more
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Synthesis of unprotected nitrogen-containing heterocycles via Aza Heck reactions
, 2022 Watson, Donald A.The main objective of this thesis is centered around the identification of novel amide electrophiles for the development of aza-Heck-type reactions.
Shuler, Scott Adam
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Nitrogen heterocycles from trimethylbenzenes
Heteroatom Chemistry, 2004 AbstractThe reaction between 1,2,4‐trimethylbenzene 1, isobutyric aldehyde, and cyanoacetic ester afforded a mixture of three products: 3,3,5,6,8‐ pentamethyl‐1,2,3,4‐tetraisoquinolylidene‐1‐acetic acid ether (2) and its 3,3,5,6,7‐pentamethyl‐(3)‐ and 3,3,6,7,8‐pentamethyl‐1,2,3,4‐tetraisoquinolyli‐ dene‐1‐acetic acid ether isomers (3) in ratio 1:5:1. ©
Yu. V. Shklyaev +6 more
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Radical Cyclization of Ynamides to Nitrogen Heterocycles
, 2022 An efficient radical cyclization of suitably functionalized ynamides to nitrogen-containing heterocycles is reported. Upon reaction with tributyltin hydride in the presence of catalytic amounts of AIBN in toluene at 80 °C, a range of ynamides bearing a N-
Blanchard, Nicolas +2 more
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Atropisomerism in Boron-Nitrogen Heterocycles/Atropisomerism in Boron-Nitrogen Heterocycles
Zeitschrift für Naturforschung B, 1987 Abstract Atropisomerism owing to hindered rotation about the N-aryl bond is observed in 4,5-diethyl-2,2,3-trimethyl-1-(o-trifluormethyl)phenyl-2,5-dihydro-1H-1,2,5-azasila-(2) and -azastanna-boroles (5). The compounds 2 and 5 are characterized by elemental analysis, mass spectra and 1H, 11B, 13 C, 29Si and119Sn NMR.
Roland Köster +3 more
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Insertion of ammonia into alkenes to build aromatic N-heterocycles
Nature Communications, 2022 Aromatic heterocycles containing nitrogen are ubiquitous in biologically relevant small molecules. Here the authors show an unorthodox methodology for their synthesis, by inserting the nitrogen atom into a carbon ring, with ammonia in electrochemical ...
Shuai Liu, Xu Cheng
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Monofluorinated Nitrogen Containing Heterocycles: Synthesis, Characterization and Fluorine Effect [PDF]
, 2020 A straight forward synthesis and efficient introduction of fluoromethyl group in nitrogen heterocycles is reported. Starting from the respective NH heterocycles fluoromethylation is performed with fluoroiodomethane and proceeds under mild reaction ...
Reichel, Marco +3 more
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The Nitrogen Heterocycle Content of Meteorites and Their Significance for the Origin of Life
Life, 2018 Carbonaceous chondrites are very primitive meteorites that are rich in carbon. They contain many soluble organic compounds, including nitrogen heterocycles.
Zita Martins
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Synthesis of arylamines and N-heterocycles by direct catalytic nitrogenation using N2
Nature Communications, 2021 Ammonia and nitric acid are key platform chemicals to introduce nitrogen into organic molecules, however gaseous N2 would be a more direct and available source of nitrogen.
Kai Wang +5 more
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Microorganisms in Chemistry of Nitrogenous Heterocycles [PDF]
, 2017 The monograph is devoted to microbiological methods of obtaining organic compounds from a series of nitrogenous heterocycles (azaarenes, quinolones and saturated nitrogenous heterocycles). It is proposed alternative ways of synthesizing compounds that are difficult to obtain using conventional methods of organic chemistry.
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