نتایج جستجو برای: heterocycles

تعداد نتایج: 2986  

2011
Kim Potgieter Eric Hosten Thomas Gerber Richard Betz

The title compound, C(30)H(28)N(6)O(2), is a symmetric diimine derived from ortho-dibenzaldehyde. Both C=N bonds are (E)-configured. The terminal N-bonded phenyl groups adopt staggered conformations relative to their respective parent heterocycles, the relevant least-squares planes inter-sect at angles of 32.35 (11) and 38.59 (10)°. In the crystal, C-H⋯O contacts connect the mol-ecules into cha...

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,...

Journal: :Molecules 2004
Peter J Steel

The syntheses of representative examples of five classes of new heterocyclic ligands are described. These include N,N'-chelating bis-heterocycles, binucleating ligands, cyclometallated compounds, chiral ligands and a family of polyheteroaryl-linked arenes.

Journal: :Chemical communications 2009
Timothy J Donohoe Lisa P Fishlock José A Basutto John F Bower Panayiotis A Procopiou Amber L Thompson

RCM can be used to make aromatic heterocycles, namely pyridines and, for the first time, pyridazines; the key step after RCM involves elimination of sulfinate to provide the aromatic system.

Journal: :Chemical communications 2013
Tao Wu Jiashun Cheng Pinhong Chen Guosheng Liu

A novel Pd-catalyzed regioselective intramolecular aminofluorination of unactivated alkenes has been developed, which is an efficient method for the synthesis of a variety of monofluoromethylated nitrogen-containing heterocycles.

Journal: :Chemical communications 2015
Anne-Chloé M A Nassoy Piotr Raubo Joseph P A Harrity

Azetidine and oxetane sulfinate salts are easily prepared from commercially available 3-iodoheterocycle precursors in a three-step sequence. They undergo smooth coupling reactions thereby providing an expedient route for the introduction of these four-membered heterocycles into indoles.

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Shaun W Lee Douglas A Mitchell Andrew L Markley Mary E Hensler David Gonzalez Aaron Wohlrab Pieter C Dorrestein Victor Nizet Jack E Dixon

Bacteriocins represent a large family of ribosomally produced peptide antibiotics. Here we describe the discovery of a widely conserved biosynthetic gene cluster for the synthesis of thiazole and oxazole heterocycles on ribosomally produced peptides. These clusters encode a toxin precursor and all necessary proteins for toxin maturation and export. Using the toxin precursor peptide and heterocy...

Journal: :Molecules 2017
Clementina M M Santos Vera L M Silva Artur M S Silva

Chromones, six-membered oxygen heterocycles, and pyrazoles, five-membered two-adjacent-nitrogen-containing heterocycles, represent two important classes of biologically active compounds. Certain derivatives of these scaffolds play an important role in medicinal chemistry and have been extensively used as versatile building blocks in organic synthesis. In this context, we will discuss the most r...

2012
T. Chandrasekhar L. Vinay Kumar A. Babul Reddy P. Jagan Naik Narayana Swamy G. Narayana Swamy

Recent drug discovery efforts are highly focused towards design and synthesis of small molecules of protein kinase C-β/AKt inhibitiors. 2 A wide ranges of heterocyclic ring systems has been studied for the development of novel chemical entities as lead molecules in the drug discovery paradigm. Indazole derivatives are one of the privileged structural fragments in medicinal chemistry having broa...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Christopher J Barile Paul C Herrmann David A Tyvoll James P Collman Richard A Decreau Brian S Bull

Platelets are important mediators of blood coagulation that lack nuclei, but contain mitochondria. Although the presence of mitochondria in platelets has long been recognized, platelet mitochondrial function remains largely unaddressed. On the basis of a small amount of literature that suggests platelet mitochondria are functional, we hypothesized that the inhibition of platelet mitochondria di...

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