Results 81 to 90 of about 40,209 (198)

Simple oxidation of pyrimidinylhydrazones to triazolopyrimidines and their inhibition of Shiga toxin trafficking [PDF]

, 2010
The oxidative cyclisation of a range of benzothieno[2,3-d]pyrimidine hydrazones (7a–j) to the 1,2,4-triazolo[4,3-c]pyrimidines (8a–j) catalysed by lithium iodide or to the 1,2,4-triazolo[1,5-c]pyrimidines (10a–j) with sodium carbonate is presented.
Ahmed, Bhaskar, Brown, Chen, Curini, Dai, El Ashry, Feng, Gundla, Guy J. Clarkson, Han, Hassan, J. Michael Lord, Jennings, Joe, Khattab, Krueger, Kumar, Kumar, Lin, Lucie J. Guetzoyan, Lynne M. Roberts, Modena, Nagamatsu, Nagaraju, Phoujdar, Prakash, Prakash, Prakash, Prasad, Ram, Rashad, Rashad, Robert A. Spooner, Sadana, Shaban, Shaban, Sheldrick, Sheldrick, Shibahara, Shishoo, Spooner, Thakur, Tonnar, Vorob'ev, Wang, Yarrow   +46 more
core   +1 more source

Chemical characterization of liquefaction products of an inertinite enriched northern Alaska coals [PDF]

, 1989
A Northern Alaskan coal rich in inertinites was further enriched by density gradient separations. The degree of condensation of the enriched coal was estimated to be low, mainly 3 ring.
Mayasandra, Venugopal
core  

Büchwald-Hartwig reaction applied to synthesis of new luminescent liquid crystal triarylamines derived from isoxazoles [PDF]

, 2015
© 2015 Taylor & Francis Group, LLC. The present work describes the synthesis and characterization of novel series of triarylamines isoxazoles (TAA) addressed to the organic photovoltaic materials. Diarylisoxazoles were synthesized by sequential [3+2] 1,
Fernandes, T. H. M., Kelly, S. M., Merlo, A. A., Vilela, G. D.   +3 more
core   +2 more sources

The Role of Flow Chemistry on the Synthesis of Pyrazoles, Pyrazolines and Pyrazole-Fused Scaffolds

Molecules
Nitrogen-containing heterocycles are fundamental scaffolds in organic chemistry, particularly due to their prevalence in pharmaceuticals, agrochemicals and materials science.
Catarina M. Correia, Artur M. S. Silva, Vera L. M. Silva   +2 more
doaj   +1 more source

Coupling Reactions of α-Bromocarboxylate with Non-Aromatic N-Heterocycles

Molecules, 2009
The conditions for the C-N bond forming reaction (C-N coupling reaction) between α-bromocarboxylate and nitrogen-containing non-aromatic heterocyclic rings under heterogeneous copper(I) oxide catalysis are investigated in this paper.
Jozef Csollei, Ivan Raich, Josef Jampilek, Lukas Placek, Barbora Slaba, Katerina Brychtova   +5 more
doaj   +1 more source

Visible‐Light‐Induced Hydrogen Generation from Mixtures of Hydrogen Boride Nanosheets and Phenanthroline Molecules

Advanced Science
Hydrogen boride (HB) nanosheets are recognized as a safe and lightweight hydrogen carrier, yet their hydrogen (H2) generation technique has been limited.
Jumpei Takeshita, Hayato Tsurugi, Andi Mauliana, Akira Yamaguchi, Takahiro Kondo, Masahiro Miyauchi   +5 more
doaj   +1 more source

Synthesis and anticancer activity of podophyllotoxin derivatives with nitrogen-containing heterocycles. [PDF]

Front Chem, 2023
Yin M, Fang Y, Sun X, Xue M, Zhang C, Zhu Z, Meng Y, Kong L, Myint YY, Li Y, Zhao J, Yang X.   +11 more
europepmc   +1 more source

Enantioselective additions of copper acetylides to cyclic iminium and oxocarbenium ions

Beilstein Journal of Organic Chemistry, 2015
The development of enantioselective, copper-catalyzed alkynylations of cyclic iminium and oxocarbenium ions is reviewed. The use of chiral copper-based catalysts has enabled high yields and enantioselectivites in the formation of nitrogen- and oxygen ...
Jixin Liu, Srimoyee Dasgupta, Mary P. Watson   +2 more
doaj   +1 more source

The Intramolecular Povarov Tool in the Construction of Fused Nitrogen-Containing Heterocycles. [PDF]

Top Curr Chem (Cham), 2023
Masdeu C, de Los Santos JM, Palacios F, Alonso C.   +3 more
europepmc   +1 more source

Silver Nitrate Complexes of Nitrogen-Containing Heterocycles

Zeitschrift für Naturforschung B, 1991
Pyrazole, 1,2,4-triazole, and 8-amino-quinoline form complexes as neutral ligands with silver nitrate in slightly acidic aqueous medium. With pyrazole a 2:1 complex (1) is obtained. The crystal structure determination revealed an ionic structure with independent NO3 - anions and centrosymmetrical (pyr)2Ag+ cations with a linear ...
Hubert Schmidbaur, Angelika Mair, Gerhard Müller, Joachim Lachmann, Siegfried Gamper   +4 more
openaire   +1 more source