Results 221 to 230 of about 10,839 (246)

Photochemical dehydrogenation of 3,4-dihydro-2-pyridones

Photochemical & Photobiological Sciences, 2009
Photochemical dehydrogenation of various substituted 3,4-dihydro-2-pyridones was achieved in a very efficient way by employing 10-15 mol% of photo-induced electron transfer sensitizers like 9-cyanoanthracene, 9-cyanophenanthrene and 1-cyanonaphthalene in presence of molecular oxygen, for the first time.
Partha Sarathi, Sadhu, Mettu, Ravinder, Perepogu Arun, Kumar, Vaidya Jayathirtha, Rao   +3 more
openaire   +2 more sources

Cycloaddition reactions of 4-sulfur-substituted dihydro-2-pyridones and 2-pyridones with conjugated dienes

Tetrahedron, 2008
Cycloaddition reactions of sulfoxide- and sulfone-substituted dihydro-2-pyridones and 2-pyridones with electron-rich dienes gave new bicyclic and tricyclic products in good to fair yields. The reactivity, regioselectivity, and stereoselectivity of these reactions were compared with semi-empirical theoretical calculations.
Shang-Shing P. Chou, Pong-Won Chen
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

Bromination of 1-alkyl-2-pyridones

Chemistry of Heterocyclic Compounds, 1982
The corresponding monobromides were obtained in the bromination of 1-alkyl-2-pyridones with bonded bromine (with N-bromosuccinimide and dioxane dibromide). The conditions under which the yields of the mixtures of isomers were 60–80%, and almost no dibromides were obtained, were found.
N. P. Shusherina, T. I. Likhomanova, S. N. Nikolaeva   +2 more
openaire   +1 more source

Regioselective conversion of 3‐cyano‐6‐hydroxy‐2‐pyridones into 3‐cyano‐6‐amino‐2‐pyridones

Journal of Heterocyclic Chemistry, 1995
AbstractThe reaction of a tautomeric mixture of 1‐butyl‐1,2‐dihydro‐6‐hydroxy‐4‐methyl‐2‐oxopyridine‐3‐carbonitrile and its 2‐hydroxy‐6‐oxo analog with phosphorus oxychloride gave 1‐butyl‐6‐chloro‐1,2‐dihydro‐4‐methyl‐2‐oxopyridine‐3‐carbonitrile (68%) and 1‐butyl‐2‐chloro‐1,6‐dihydro‐4‐methyl‐6‐pyridine‐3‐car‐bonitrile (3%).
Alan R. Katritzky, Stanislaw Rachwal, Terrance P. Smith   +2 more
openaire   +1 more source

Sodium 5-nitro-2-pyridonate trihydrate

Acta Crystallographica Section C Crystal Structure Communications, 2000
The title compound, alternatively sodium pyridin-2-olate trihydrate, Na(+).C(5)H(3)N(2)O(3)(-).3H(2)O, crystallizes in the P-1 space group. It is made up of edge-shared chains of NaO(6) octahedra with five water molecules and one 5-nitro-2-pyridonate anion. Four of these water molecules are bicoordinating, involved in connecting the adjacent octahedra,
, Muthuraman, , Nicoud, , Bagieu-Beucher
openaire   +2 more sources

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

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

2-pyridones

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