Results 31 to 40 of about 1,216 (196)
Molecules, 2022 Dysidazirine carboxylic acid (1) was isolated from the lipophilic extract of a collection of the benthic marine cyanobacterium Caldora sp. from reefs near Fort Lauderdale, Florida. The planar structure of this new compound was determined by spectroscopic
Sarath P. Gunasekera +6 more
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, 2016 Enhancement of the Enantioselectivity in Lipase-Catalyzed Kinetic Resolutions of 3-Phenyl-2H-azirine-2-methanol by Lowering the Temperature to −40 °
Tadashi Ema (1581424) +4 more
core +1 more source
Employing Metadynamics to Predict the Membrane Partitioning of Carboxy-2H-Azirine Natural Products [PDF]
Natural products have diverse chemical structures and biological activities which often serve as sources of new therapeutic agents. Those containing a carboxy-2H-azirine moiety are an exciting target for investigation due in part to the broad-spectrum ...
Leah, Seebald, Emma, Wolk, Clyde, Daly
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Beilstein Journal of Organic Chemistry, 2015 The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates.
Kandasamy Rajaguru +4 more
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Neuere Methoden zur Ringerweiterung organischer Verbindungen
CHIMIA, 1980 The actual interest in the construction of cyclic compounds via ring expansion reactions is demonstrated in the first chapter by means of typical examples.
Heinz Heimgartner
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Kristallstruktur eines 2-Dimethylamino-3,3-dimethyl-4(3H)-pyridons
CHIMIA, 1982 3-Dimethylamino-2,2-dimethyl-2H-azirine (1) reacts with alkyl phenyl substituted cyclopropenones 2 in benzene at 130 °C to give a mixture of the two isomeric 4(3H)-pyridones 3 and 4, resulting from a nucleophilic attack at C(2) and C(1) of the ...
Jost H. Bieri +2 more
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Chiral Pyrazolinylidene Complexes for Asymmetric Catalysis
Chemistry – A European Journal, EarlyView.The synthesis and application of pyrazolin‐5‐ylidene NHC chiral‐at‐ruthenium catalysts is reported. The strong donating pyrazolin‐5‐ylidene ligands led to highly electron rich ruthenium complexes, which showed excellent catalytic activity and enantioselectivity in the intramolecular aziridination of an alkene.
Felix Möller +6 more
wiley +1 more source
3-Amino-2H-azirine, Moleküle mit vielfältigen Reaktionsmöglichkeiten
CHIMIA, 1979 3-Amino-2H-azirines, cyclic three-membered amidines with an estimated ring strain of about 200 kJ/mole, undergo a variety of reactions. Thereby, each of the azirine bonds can be broken: Thermolysis leads to the rupture of the C(2),C(3)-bond, with strong
Heinz Heimgartner
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Selective N‐Functionalization of Pyrazoles
European Journal of Organic Chemistry, EarlyView.This review traces the evolution of regioselective N‐functionalization strategies for pyrazoles, a key class of nitrogen heterocycles widely used in medicinal chemistry. Due to rapid tautomerism, N‐functionalization often lacks selectivity, leading to poor and unpredictable regioisomeric outcomes.
Lucas Popek +2 more
wiley +1 more source
Reaktionen von 3-Dimethylamino-2,2-dimethyl-2H-azirin mit aromatischen Carbonsäurehydraziden
CHIMIA, 1978 Reaction of 3-dimethylamino-2,2-dimethyl-2H-azirine (1) with salicylic acid hydrazide (2c) in acetonitrile at room temperature gives the amidrazone 3c as a primary product in 78% yield. Cyclization of 3c in methanol leads to the 1,2,5,6-tetrahydro-1,2,4-
Stanislav Chaloupka, Heinz Heimgartner
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