نتایج جستجو برای: heterocyclic compounds

تعداد نتایج: 232222  

Journal: :Chemistry 2015
Danila Gasperini Alba Collado Adrián Goméz-Suárez David B Cordes Alexandra M Z Slawin Steven P Nolan

A new synthetic strategy was devised leading to the formation of complexes, such as [Au(IPr)(CH2 COCH3)]. The approach capitalizes on the formation of a decomposition product observed in the course of the synthesis of [Au(IPr)(Cl)]. A library of gold acetonyl complexes containing the most common N-heterocyclic carbene (NHC) ligands has been synthesized. These acetonyl complexes are good synthon...

Journal: :Journal of Synthetic Organic Chemistry, Japan 1956

Journal: :The Journal of organic chemistry 2008
Ian R Morgan Arife Yazici Stephen G Pyne Brian W Skelton

Pyrido- and pyrrolo[2,3-d]oxazoles can be conveniently prepared in high yield from the Ritter reaction of nitriles and in situ generated chiral cyclic N-acyliminium ions. cis-4-Hydroxy-5-acylaminopyrrolidines and cis-5-hydroxy-6-acylaminopiperidines can be readily obtained by acid hydrolysis of these bicyclic heterocyclic compounds, respectively.

Journal: :Molecules 2011
Nagwa Mohamed Mahrous Hamada Essam Mohamed Sharshira

Some new heterocyclic compounds containing isoxazole, pyrazole and oxadiazole ring systems were prepared from various chalcones. The synthesized compounds have been characterized by elemental analysis and spectral methods. These compounds were screened for their antimicrobial activities.

2008
VIKTOR KRCHNAK

The exclusive role of heterocyclic compounds for drug discovery is best documented by the occurrence of a heterocyclic moiety in current drugs; the majority of drugs are heterocyclic compounds. Consequently, a substantial effort has been dedicated to the development of chemistries, both solidand solution-phase, for combinatorial syntheses of heterocyclic libraries. Traditionally, generic combin...

Journal: :Environmental Health Perspectives 1996
S Robbana-Barnat M Rabache E Rialland J Fradin

This article deals with the mutagenic heterocyclic amines, especially the aminoimidazoazaarenes family, isolated from cooked foods. The conditions which lead to their occurrence in foods are discussed. This formation primarily depends on the characteristics of the food, such as the type of the food and the presence of precursors, water, and lipids. Secondarily, it depends on the cooking modes w...

Journal: :Dalton transactions 2006
Robert J Baker Cameron Jones David P Mills Damien M Murphy Evamarie Hey-Hawkins Robert Wolf

The reactivity of a series of Ga(I), Ga(II) and Ga(III) heterocyclic compounds towards a number of Group 15 substrates has been investigated with a view to prepare examples of gallium-terminal pnictinidene complexes. Although no examples of such complexes were isolated, a number of novel complexes have been prepared. The reactions of the gallium(I) N-heterocyclic carbene analogue, [K(tmeda)][:G...

Journal: :Inorganic chemistry 2011
Laszlo Mercs Antonia Neels Helen Stoeckli-Evans Martin Albrecht

A series of bimetallic N-heterocyclic carbene (NHC) ruthenium(II) complexes were synthesized, which comprise two [RuCl(2)(cymene)(NHC)] units that are interlinked via the NHC nitrogens by alkyl chains of different length. Electrochemical characterization revealed two mutually dependent oxidation processes for the complex with a methylene linker, indicating moderate intramolecular electronic cou...

2016
SOURAV DE

Heterocyclic compounds are of very much interest in our daily life. Heterocyclic compounds have one or more heteroatoms in their structure. They may be cyclic or non-cyclic in nature. Heterocyclic compounds have a wide range of application. They are predominantly used as pharmaceuticals, agrochemicals, and veterinary products. They also find applications as sanitizers, developers, antioxidants,...

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