Results 161 to 170 of about 2,994 (192)

Thermodynamic and spectroscopic properties of 2-pyrrolidinones. 2. Dielectric properties of 2-pyrrolidinone in binary mixtures

Journal of Solution Chemistry, 1990
Dielectric permittivities of 2-pyrrolidinone - acetone, -dimethyl sulfoxide,-2-propanol, -dichloromethane and -water systems were measured as a function of mole fraction over the whole composition range at 30 and 50°C. The excess dielectric permittivities are predominantly negative for all the mixtures and the excess molar polarizations are negative ...
P. Ruostesuo, P. Piril�-Honkanen
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Hypolipidemic Activity of Substituted 2-Pyrrolidinones in Rodents

Journal of Pharmaceutical Sciences, 1983
A series of substituted 2-pyrrolidinones was evaluated for hypolipidemic activity at 20 and 30 mg/kg/day in CF1 male mice. 4-Phenyl-5,5-dicarbethoxy-2-pyrrolidinone was the most potent compound at 30 mg/kg/day, reducing serum triglyceride levels 52% after 14 days of dosing and serum cholesterol levels 48% after 16 days of dosing.
G H, Cocolas, J M, Chapman, P J, Voorstad, I H, Hall   +3 more
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Structure of the 2-Pyrrolidinone Monohydrate

Zeitschrift für Naturforschung B, 1999
The X-ray crystal structure of the 1:1 adduct shows a complicated network of water and 2-pyrrolidinone molecules where the carbonyl oxygen atom of 2-pyrrolidinone forms hydrogen bonds with protons of two separate water molecules and the NH proton of the 2- pyrrolidinone molecule interacts with the oxygen atom of a third water molecule.
Päivi Pirilä, Ilpo Mutikainen, Jouni Pursiainen   +2 more
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Pyrrolidinones from the Ascomycete Fungus Albonectria rigidiuscula

Journal of Natural Products, 2009
The new pyrrolidinones, rigidiusculamides A-D (1-4), have been isolated from the crude extract of the ascomycete fungus Albonectria rigidiuscula. The structures of these compounds were elucidated primarily by NMR experiments. The absolute configuration of the 3,4-diol moieties in 1 and 4 was assigned using Snatzke's method.
Jian, Li, Shuchun, Liu, Shubin, Niu, Wenying, Zhuang, Yongsheng, Che   +4 more
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1-[2-(Vinylthio)ethyl]-2-pyrrolidinone

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1961
1. 1-[2-(Vinylthio)ethyl]-2-pyrrolidinone was synthesized. 2. New water-soluble polymers were prepared by the polymerization of 1 -[2-(vinylthio)ethyl]-2-pyrrolidinone and by its copolymerization with 1-vinyl-2-pyrrolidinone. 3.
M. F. Shostakovskii, F. P. Sidel'kovskaya, �. S. Shapiro, T. Ya. Ogibina   +3 more
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ChemInform Abstract: SPIROBIS(2‐PYRROLIDINONES). I. SYNTHESIS AND ABSOLUTE CONFIGURATION OF THREE ISOMERIC SPIROBIS(2‐PYRROLIDINONES)

Chemischer Informationsdienst, 1982
AbstractDie aus dem Diester (Ia) und einem großen Überschuß Natronlauge erhaltene Dicarbonsäure (Ib) wird in das Anhydrid (II) umgewandelt, dessen Ethanolyse zu den Estern (III) führt.
M. KAJTAR, M. HOLLOSI, K. KINSKY, Z. MAJER   +3 more
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Densities, Viscosities, Speeds of Sound, and Relative Permittivities for Water + Cyclic Amides (2-Pyrrolidinone, 1-Methyl-2-pyrrolidinone, and 1-Vinyl-2-pyrrolidinone) at Different Temperatures

Journal of Chemical & Engineering Data, 2004
Experimental densities, ρ, viscosities, η, speeds of sound, υ, and relative permittivities, er, for three binary mixtures of water + 2-pyrrolidinone, + 1-methyl-2-pyrrolidinone, and + 1-vinyl-2-pyrrolidinone were measured over the entire composition range and at different temperatures.
John George, Nandhibatla V. Sastry
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Synthesis of [4‐³H]‐2‐pyrrolidinone, [4‐³H]‐N‐methyl‐2‐pyrrolidinone and N‐[¹⁴C‐methyl]‐2‐pyrrolidinone

Journal of Labelled Compounds and Radiopharmaceuticals, 1985
AbstractAn efficient synthesis of 2‐pyrrolidinone and N‐methyl‐2‐pyrrolidinone was developed in which the compounds can be labeled with tritium at either the 3‐ and 4‐positions or the 4‐position of the lactam ring. Cyclization of [2,3‐3H]‐γ‐aminobutyric acid (GABA) yielded [3,4‐3H]‐2‐pyrrolidinone and cyclization of [3‐3H]‐GABA, prepared by acid ...
David A. Wells, James E. Chaney, George A. Digenis   +2 more
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Synthesis and reactions of 3‐pyrrolidinones

Journal of Heterocyclic Chemistry, 2008
Abstractmagnified imageThis review presents a survey of the synthetic methods and reactions of 3‐pyrrolidinonesI(R = H, alkyl, acyl, ester; R1= H, alkyl, cyano, ester, etc). 3‐Pyrrolidinones are synthetically versatiles substrate, as they can be used for synthesis of a large variety of heterocyclic compounds, such as indoles and 5‐deazapteroic acid ...
Fathy Abdel‐Kader Amer, Metwally Hammouda, Bakr Fathy Abdel‐Wahab, Abdel‐Aziz Sayed El‐Ahl   +3 more
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ChemInform Abstract: Easy Approach to 3‐Benzylimino‐2‐pyrrolidinones from 3‐Chloro‐4‐chloromethyl‐2‐pyrrolidinones.

ChemInform, 2000
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Franco Ghelfi, Gianluca Ghirardini, Emanuela Libertini, Luca Forti, Ugo M. Pagnoni   +4 more
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