Results 81 to 90 of about 4,376 (210)

Synthesis and Characterization of 6-Carbamoyl-1,2-dihydropurines

E-Journal of Chemistry, 2007
The aromatic amines react readily with (Z)-N-(2-amino-1,2-dicyanovinyl)formimidate (4) to give the amidines (5a-b), which cyclize in the presence of DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) to give the corresponding 2-(5-Amino-1-phenyl-1H-imidazol-4-yl ...
Asieh Yahyazadeh, Fatemah Hossaini
doaj   +1 more source

Multicomponent Synthesis of 3,6-Dihydro-2H-1,3-thiazine-2-thiones

Molecules, 2012
Non-fused 3,6-dihydro-2H-1,3-thiazine-2-thiones constitute a so far rather unexplored class of compounds, with the latest report dating back more than two decades.
Frans J. J. de Kanter, Eelco Ruijter, Romano V. A. Orru, Madeleine Helliwell, Elwin Janssen, Marten L. Ploeger, Art Kruithof   +6 more
doaj   +1 more source

Synthesis and Spectral Analysis of 3,4,5-trichloro-6-(dibenzo[d,f][1,3]diazepin-5-yl)-[1,2]-benzoquinones

E-Journal of Chemistry, 2011
Reaction of N1,N2-di-(4-methoxyphenyl)- or N1,N2-di-(4-hydroxyphenyl) -amidines (1a-d) with 3,4,5,6-tetrachloro-1,2-benzoquinone (2) in ethyl acetate at room temperature led to formation of new 3,4,5-trichloro-6-(2-hydroxy-6-methyldibenzo[d,f][1,3 ...
Mohsen A. M. Gomaa
doaj   +1 more source

amidines

, 2014
Citation: 'amidines' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.A00267 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Silver(I)-Promoted Conversion of Thioamides to Amidines: Divergent Synthesis of a Key Series of Vancomycin Aglycon Residue 4 Amidines That Clarify Binding Behavior to Model Ligands

, 2016
Development of a general Ag­(I)-promoted reaction for the conversion of thioamides to amidines is disclosed. This reaction was employed to prepare a key series of vancomycin aglycon residue 4 substituted amidines that were used to clarify their ...
Dale L. Boger (1306542), Joshua G. Pierce (1528897), Akinori Okano (1325607), Robert C. James (2079388), Jian Xie (629484)   +4 more
core   +1 more source

Reaction of analogs of natural isoflavonoids with amidines [PDF]

, 2006
Recyclization of the chromone ring in a series of analogs of natural isoflavonoids by reaction with amidines was ...
Khilya, Volodimir, Frasinyuk, Mihaylo, Bondarenko, Svetlana   +2 more
core   +1 more source

3-Amino-2H-azirine, Moleküle mit vielfältigen Reaktionsmöglichkeiten

CHIMIA, 1979
3-Amino-2H-azirines, cyclic three-membered amidines with an estimated ring strain of about 200 kJ/mole, undergo a variety of reactions. Thereby, each of the azirine bonds can be broken: Thermolysis leads to the rupture of the C(2),C(3)-bond, with strong
Heinz Heimgartner
doaj   +1 more source

Palladium-Catalyzed Construction of Amidines from Arylboronic Acids under Oxidative Conditions

, 2016
A valuable palladium-catalyzed three-component coupling reaction for the synthesis of amidines has been developed. Using arylboronic acids, isocyanides, and anilines as the reactants under oxidative conditions, various amidines were isolated in good ...
Xiao‐Feng Wu, Orru, Romano V.A., Zechao Wang, Wu, Xiao Feng, Bert U. W. Maes, Orru, Romano V. A., Wu, Xiao-Feng, Li, Yahui, Orru, Romano V.A.; id_orcid, Fengxiang Zhu, Maes, Bert U.W., Yahui Li, Maes, Bert, Zhu, Fengxiang, Wang, Zechao, Romano V. A. Orru   +15 more
core   +1 more source

The Groebke–Blackburn–Bienaymé reaction in its maturity: innovation and improvements since its 21st birthday (2019–2023)

Beilstein Journal of Organic Chemistry
The Groebke–Blackburn–Bienaymé (GBB) three-component reaction, discovered in 1998, is a very efficient strategy to assemble imidazo[1,2-a]-heterocycles starting from amidines, aldehydes and isocyanides.
Cristina Martini, Muhammad Idham Darussalam Mardjan, Andrea Basso   +2 more
doaj   +1 more source

Synthesis of N‑Sulfonyl Amidines and Acyl Sulfonyl Ureas from Sulfonyl Azides, Carbon Monoxide, and Amides

, 2017
A Pd-catalyzed and ligand-free carbonylation/cycloaddition/decarboxylation cascade synthesis of sulfonyl amidines from sulfonyl azides and substituted amides at low CO pressure is reported.
Shiao Y. Chow (2245183), Luke R. Odell (1284567)   +1 more
core   +1 more source