Results 131 to 140 of about 524 (174)

ChemInform Abstract: IMIDAZOLONE 3. MITT. DIE ACYLIERUNGSREAKTIONEN 2,5(4)‐SUBSTITUIERTER IMIDAZOLONE‐4(5)

Chemischer Informationsdienst. Organische Chemie, 1971
AbstractBei der Acylierung der substituierten Imidazolone (I) entstehen in Abhängigkeit vom Reaktionsmedium, vom Acylierungsmittel und von den Substituenten am Imidazolonring verschiedene Acylierungsprodukte (II)‐(V).
YU. YA. USAEVICH, I. KH. FEL'DMAN, E. I. BOKSINER   +2 more
openaire   +1 more source

Methylidene-imidazolone: a novel electrophile for substrate activation

Current Opinion in Chemical Biology, 2001
The recent three-dimensional structure of histidine ammonia-lyase revealed that the enzyme contains a 3,5-dihydro-5-methylidene-4H-imidazol-4-one (MIO) ring, which forms autocatalytically from an Ala-Ser143-Gly triad. This novel prosthetic group, which is also present in phenylalanine ammonia-lyase, activates substrates by electrophilic interaction ...
openaire   +2 more sources

ChemInform Abstract: Imidazolones in the Reaction with Acylacetylenes.

Chemischer Informationsdienst, 1986
AbstractBenzimidazolon (I) reagiert mit den Acylacetylenen (II) zu den N,N‐Bis‐ Addukten (III), während aus 4,5‐Diphenylimidazolon (IV) und (II) Gemische der Mono‐ und Bis‐Addukte (V) und (VI) entstehen.
G. G. SKVORTSOVA, L. V. ANDRYANKOVA, N. D. ABRAMOVA   +2 more
openaire   +1 more source

Imidazolones

Chemistry of Heterocyclic Compounds, 1971
Yu. Ya. Usaevich, I. Kh. Fel'dman, E. I. Boksiner   +2 more
openaire   +2 more sources

Synthesis and Characterization of Photochromic Imidazolone Azopolycyanurates

International Journal of Polymeric Materials, 1999
Photochromic imidazolone azopolycyanurates containing mercury dithizonate moiety have been prepared by interfacial polycondensation technique. All the azopolycyanurates have been characterized by their IR spectra, viscosity, molecular weight by GPC and thermogravimetry.
Samir M. Bhalakia, Ranjan G. Patel
openaire   +1 more source

A Phosphine-Catalyzed Preparation of 4-Arylidene-5-imidazolones

The Journal of Organic Chemistry, 2014
A simple and efficient method for constructing 4-arylidene-5-imidazolones was developed using a phosphine-catalyzed tandem umpolung addition and intramolecular cyclization of amidine pronucleophiles on arylpropiolates. The reaction offers a robust route to heterocycle analogues of the fluorescent protein chromophores.
Sandra, Gabillet, Olivier, Loreau, Simon, Specklin, Evelia, Rasalofonjatovo, Frédéric, Taran   +4 more
openaire   +2 more sources

THE SYNTHESES OF 2-IMIDAZOLONE-4-CARBOXYLIC ACID AND 2-IMIDAZOLONE

Journal of the American Chemical Society, 1932
openaire   +1 more source

Formation of Imidazolones by Ring Closure of α-Isocyanoamides: Exploring New Reactivities

Synlett, 2020
Laurent Bischoff, Christophe Hoarau
exaly  

Derivatives of 4(5H)-Imidazolone

Journal of the American Chemical Society, 1953
H. Lehr, S. Karlan, M. W. Goldberg
openaire   +1 more source

Cyclization of Propynylureas to 2-Imidazolones

The Journal of Organic Chemistry, 1963
P. J. Stoffel, A. J. Speziale
openaire   +1 more source