Results 131 to 140 of about 5,533 (174)

Oxidation of chiral non-racemic pyridinium salts to enantiopure 2-pyridone and 3-alkyl-2-pyridones

Tetrahedron: Asymmetry, 1998
Abstract Oxidation of chiral non-racemic pyridinium salt 1a and 3-alkyl pyridinium salts 1b and 1c with potassium ferricyanide in an alkaline medium provides a short and practical access to enantiomerically pure 2-pyridone ( 2a ) and 3-alkyl-2-pyridones ( 2b and 2c ) in high yields and very good regioselectivity from derivatives 1 ( b – c ).
Dino Gnecco, Christian Marazano, Raúl G Enrı́quez, Joel L Terán, Marı́a del Rayo Sánchez S, Alberto Galindo   +5 more
openaire   +1 more source

Nitration of 1-methyl-2-pyridone

Chemistry of Heterocyclic Compounds, 1973
Nitration of 1-methyl-2-pyridone with 70% nitric acid or fuming nitric acid at 0–20°C proceeds in the 3 and 5 positions to give a mixture of mononitro isomers, the structures of which were proved by PMR spectroscopy. Mainly 3,5-dinitro-1-methyl-2-pyridone is formed by the action of fuming nitric acid or a nitrating mixture at 90°.
N. P. Shusherina, T. I. Likhomanova
openaire   +1 more source

2-Pyridon-katalysierte Esteraminolyse

2005
Im Rahmen dieser Arbeit wurde die katalysierte Aminolysereaktion aktivierter Ester durch Amine in unpolaren Lösemitteln untersucht. Als Modelreaktion diente dabei die n-Butylaminolyse von p-Nitrophenylacetat, die mit Hilfe von 1H-NMR-Messungen in CDCl3 spektroskopisch verfolgt wurde. Als Katalysatoren dienten alkylsubstituierte 3-Cyano-2-pyridone.
openaire   +1 more source

Copper-Catalyzed Regioselective Imidation of 2-Pyridones

Organic Letters
We demonstrate a ligand- and glovebox-free regioselective direct C(3)-H imidation of 2-pyridones and also benzylic-type imidation of 2-pyridones bearing a methyl substituent employing Cu(OAc)2·H2O as the catalyst and N-fluorobenzenesulfonimide (NFSI) as an imidating reagent.
Tamilarasu Murugesan, Shanawas Hussain Moulana Mahal, Kalyanakrishnan Arayil Vennoli, Dharsan Karthikeyan, Alagiri Kaliyamoorthy   +4 more
openaire   +2 more sources

2-Pyridones

Chemistry of Heterocyclic Compounds, 1974
N. P. Shusherina, L. V. Betaneli
openaire   +1 more source

2-pyridones

The Lancet, 1995
J.F. Harper, DavidC. Hooper
openaire   +1 more source

2-Pyridones

Chemistry of Heterocyclic Compounds, 1972
N. P. Shusherina, T. I. Likhomanova
openaire   +1 more source

DERIVATIVES OF 2-PYRIDONE

The Journal of Organic Chemistry, 1946
W, WENNER, J T, PLATI
openaire   +2 more sources

2‐Pyridon‐Mesogene; 2‐Pyridon‐5‐carbonsäure‐ester

Zeitschrift für Chemie, 1978
Siegfried Hoffmann, Werner Witkowski, Gisela Borrmann, Hermann Schubert, Wolfgang Weissflog   +4 more
openaire   +1 more source

Highly Regioselective Synthesis of N‐β‐trifluoromethyl 2‐pyridones via anti‐Markovnikov Hydroamination of α‐(trifluoromethyl)styrenes with 2‐pyridones

Chemistry - an Asian Journal, 2023
Zhudi Sun, Yupian Deng
exaly