Journal ArticleDOI
[Imidazole syntheses. 8. N-Substituted imidazoles according to Weidenhagen].
Volker Stoeck,Walter Schunack +1 more
Reads0
Chats0
TLDR
Weidenhagen synthesis of N-unsubstituted imidazoles from α-substitized carbonyl compounds 1, aldehydes 3, and aqueous ammonia (4) with copper (II) salts as oxidizing agents as mentioned in this paper.Abstract:
Die Weidenhagen-Synthese N-unsubstituierter Imidazole aus α-substituierten Carbonylverbindungen 1, Aldehyden 3, wasrigem Ammoniak (4) und Kupfer(II)-salzen als Oxidationsmittel ist in Gegenwart primarer Amine 5 auch zur Darstellung N-substituierter Imidazole 6 geeignet.
Weidenhagen Synthesis of N-Substituted Imidazoles
The Weidenhagen synthesis of N-unsubstituted imidazoles from α-substituted carbonyl compounds 1, aldehydes 3, and aqueous ammonia (4) with copper (II) salts as oxidizing agents is also usable for the synthesis of N-substituted imidazoles 6 through the addition of primary amines 5.read more
Citations
More filters
Journal ArticleDOI
Synthesis and biological activity of vicinal diaryl-substituted 1H-imidazoles
TL;DR: The methods used for the synthesis of vicinal diary-substituted 1 H -imidazole derivatives are reviewed in this paper, which contains 519 references and summarizes the biological properties of some of these heterocycles.
Journal ArticleDOI
CuFe2O4 nanoparticles: an efficient heterogeneous magnetically separable catalyst for synthesis of some novel propynyl-1H-imidazoles derivatives
TL;DR: The non-toxic magnetic CuFe2O4 nanoparticles have been synthesized, characterized, and used as an efficient catalyst for synthesis of new derivatives for 1,2,4,5-tetrasubstituted imidazoles in excellent yields.
Journal ArticleDOI
Highly Efficient, Four Component, One-pot Synthesis of Tetrasubstituted Imidazoles Using a Catalytic Amount of FeCl3 · 6H2O
TL;DR: In this paper, an efficient and improved procedure for the synthesis of tetrasubstituted imidazoles by FeCl3 · 6H2O catalyzed four-component one-pot synthesis in refluxing ethanol is described.
Journal ArticleDOI
Four-Component, One-Pot Synthesis of Tetra-Substituted Imidazoles Using a Catalytic Amount of MCM-41 or p-TsOH
TL;DR: An improved and rapid one-pot synthesis of tetrasubstituted imidazoles by condensing benzil, ammonium acetate, amines, and aromatic aldehydes using a catalytic amount of silica structure MCM-41 or p-toluenesulfonic acid (p-TsOH) was reported in this paper.
Journal ArticleDOI
A direct synthetic approach to novel quadrupolar [14] azolophanes
TL;DR: A convergent 3+1 synthesis of meta azolophanes as discussed by the authors allowed a simple entrance to the first examples of [1 4 ] meta azlophanes 1 and [ 1 4 ]( meta-ortho ) 2 built up from heterocyclic betaine subunits, illustrating a prototype of phanes constructed by both highly π-excessive and highly ε-deficient heteroaromatic moieties linked in a 1,3-alternating fashion.
References
More filters
Journal ArticleDOI
Eine neue Synthese von Imidazol‐Derivaten
Journal ArticleDOI
Photorearrangements of some N-methyl diazoles
Peter Beak,W. Messer +1 more
TL;DR: In this paper, the photointerconversion of 1,4-dimethylimidazole and 1,2-dimethylidazoles and the photorearrangements of 1.4, 5, and 1.3, 5-trimethylpyrazole to 1.2, 4, 1.5, and 2.4 positions were reported.
Journal ArticleDOI
CCCXV.—Orientation of the 1 : 4- and 1 : 5-dimethylglyoxalines. Mode of fission of 5-aminoglyoxalines
Journal ArticleDOI
Über neue Abkömmlinge des Imidazols (IV. Mitteil. über Imidazole)
Journal ArticleDOI
N‐Substituierte Imidazole aus Aldehyden, 1,2‐Diketonen, primären Aminen und flüssigem Ammoniak. 4. Mitt. über Imidazolsynthesen mit flüssigem Ammoniak
Volker Stoeck,Walter Schunack +1 more
TL;DR: In this paper, N-substituted imidazoles 5 can be synthesized from aldehydes 1, 1, 2-diketones 2 and primary amines 3 in liquid ammonia 4.
Related Papers (5)
N‐Substituierte Imidazole aus Aldehyden, 1,2‐Diketonen, primären Aminen und flüssigem Ammoniak. 4. Mitt. über Imidazolsynthesen mit flüssigem Ammoniak
Volker Stoeck,Walter Schunack +1 more