ChemInform Abstract: One-Step Protection-Free Synthesis of 3-Aryl-5-hydroxyalkyl-1,2,4-oxadiazoles as Building Blocks.

ChemInform ◽  
2013 ◽  
Vol 45 (1) ◽  
pp. no-no
Author(s):  
Ricardo A. W. Neves Filho ◽  
Diana C. B. da Silva-Alves ◽  
Janaina V. dos Anjos ◽  
Rajendra M. Srivastava
Keyword(s):  
Building Blocks ◽  
One Step

scholarly journals Constructing Large 2D Lattices Out of DNA-Tiles

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1502
Author(s):  
Johannes M. Parikka ◽  
Karolina Sokołowska ◽  
Nemanja Markešević ◽  
J. Jussi Toppari
Keyword(s):  
Self Assembly ◽  
Dna Nanotechnology ◽  
Building Blocks ◽  
High Yield ◽  
Dna Nanostructures ◽  
Liquid Interfaces ◽  
Basic Principles ◽  
Dna Tiles ◽  
One Step ◽  
Solid Liquid

The predictable nature of deoxyribonucleic acid (DNA) interactions enables assembly of DNA into almost any arbitrary shape with programmable features of nanometer precision. The recent progress of DNA nanotechnology has allowed production of an even wider gamut of possible shapes with high-yield and error-free assembly processes. Most of these structures are, however, limited in size to a nanometer scale. To overcome this limitation, a plethora of studies has been carried out to form larger structures using DNA assemblies as building blocks or tiles. Therefore, DNA tiles have become one of the most widely used building blocks for engineering large, intricate structures with nanometer precision. To create even larger assemblies with highly organized patterns, scientists have developed a variety of structural design principles and assembly methods. This review first summarizes currently available DNA tile toolboxes and the basic principles of lattice formation and hierarchical self-assembly using DNA tiles. Special emphasis is given to the forces involved in the assembly process in liquid-liquid and at solid-liquid interfaces, and how to master them to reach the optimum balance between the involved interactions for successful self-assembly. In addition, we focus on the recent approaches that have shown great potential for the controlled immobilization and positioning of DNA nanostructures on different surfaces. The ability to position DNA objects in a controllable manner on technologically relevant surfaces is one step forward towards the integration of DNA-based materials into nanoelectronic and sensor devices.

Transition-metal-catalyzed multicomponent coupling reactions with imines and carbon monoxide

2013 ◽  
Vol 85 (2) ◽  
pp. 377-384 ◽  
Author(s):  
Jeffrey S. Quesnel ◽  
Bruce A. Arndtsen
Keyword(s):  
Transition Metal ◽  
Building Blocks ◽  
Coupling Reactions ◽  
Metal Catalysis ◽  
Heterocyclic Derivatives ◽  
One Step ◽  
Multicomponent Coupling Reactions ◽  
Metal Catalyzed ◽  
And Control ◽  
Multicomponent Coupling

Multicomponent coupling reactions provide a method to combine several substrates in a single reaction. When coupled with transition-metal catalysis, these reactions can be used to both activate and control the assembly of multiple simple building blocks directly into useful products. This account will describe our work in this area, with a focus on the use of palladium catalysis as a tool to couple imines and CO with other substrates into a range of heterocyclic derivatives in one-step reactions.

The ultimate step towards a tailored engineering of core@shell and core@shell@shell nanoparticles

Nanoscale ◽  
2014 ◽  
Vol 6 (22) ◽  
pp. 13483-13486 ◽  
Author(s):  
D. Llamosa ◽  
M. Ruano ◽  
L. Martínez ◽  
A. Mayoral ◽  
E. Roman ◽  
...  
Keyword(s):  
Building Blocks ◽  
Core Shell ◽  
Chemical Methods ◽  
Shell Nanoparticles ◽  
The Core ◽  
One Step ◽  
Step Generation ◽  
The One

Core@shell and core@shell@shell nanoparticles are building blocks for more sophisticated systems and a plethora of applications. The one-step generation of such complex nanoparticles is reported where the atoms of the core and shell can be easily inverted, avoiding intrinsic constraints of chemical methods.

Orthogonal self-assembly of stimuli-responsive supramolecular polymers using one-step prepared heterotelechelic building blocks

2013 ◽  
Vol 4 (1) ◽  
pp. 113-123 ◽  
Author(s):  
Ulrich Mansfeld ◽  
Andreas Winter ◽  
Martin D. Hager ◽  
Richard Hoogenboom ◽  
Wolfgang Günther ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Supramolecular Polymers ◽  
Stimuli Responsive ◽  
One Step

scholarly journals One-step route to tricyclic fused 1,2,3,4-tetrahydroisoquinoline systems via the Castagnoli–Cushman protocol

2020 ◽  
Vol 16 ◽  
pp. 1456-1464
Author(s):  
Aleksandar Pashev ◽  
Nikola Burdzhiev ◽  
Elena Stanoeva
Keyword(s):  
Succinic Anhydride ◽  
Building Blocks ◽  
2D Nmr ◽  
Bioactive Molecules ◽  
Exocyclic Double Bond ◽  
Nmr Techniques ◽  
One Step ◽  
Bridgehead Nitrogen ◽  
New Compounds ◽  
Isoquinoline Derivatives

The Castagnoli–Cushman reaction of 3,4-dihydroisoquinolines with glutaric anhydride, its oxygen and sulfur analogues was investigated as a one-step approach to the benzo[a]quinolizidine system and its heterocyclic analogs. An extension towards the pyrrolo[2,1-a]isoquinoline system was achieved with the use of succinic anhydride. The results are evidence of an unexplored method for the access of the aforementioned tricyclic annelated systems incorporating a bridgehead nitrogen atom. The structures and relative configurations of the new compounds were established by means of 1D and 2D NMR techniques. The reactions between 1-methyldihydroisoquinoline and glutaric, diglycolic and succinic anhydrides yielded unexpected isoquinoline derivatives containing an exocyclic double bond. The compounds prepared bear the potential to become building blocks for future synthetic bioactive molecules.

scholarly journals Improving the Electrochemical Performance and Stability of Polypyrrole by Polymerizing Ionic Liquids

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 136 ◽  
Author(s):  
Arko Kesküla ◽  
Ivo Heinmaa ◽  
Tarmo Tamm ◽  
Nihan Aydemir ◽  
Jadranka Travas-Sejdic ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Building Blocks ◽  
Ionic Species ◽  
Operating Environment ◽  
Ionic Polymer ◽  
Carbonate Solutions ◽  
Capacity Current ◽  
One Step ◽  
And Behavior ◽  
Conductive Properties

Polypyrrole (PPy) based electroactive materials are important building blocks for the development of flexible electronics, bio-sensors and actuator devices. As the properties and behavior of PPy depends strongly on the operating environment—electrolyte, solvent, etc., it is desirable to plant immobile ionic species into PPy films to ensure stable response. A premade ionic polymer is not optimal in many cases, as it enforces its own structure on the conducting polymer, therefore, polymerization during fabrication is preferred. Pyrrole (Py) was electropolymerized at low temperature together with a polymerizable ionic liquid (PIL) monomer in a one-step polymerization, to form a stable film on the working electrode. The structure and morphology of the PPyPIL films were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier-transform infrared (FTIR) spectroscopy and solid-state NMR (ssNMR) spectroscopy. The spectroscopy results confirmed the successful polymerization of Py to PPy and PIL monomer to PIL. The presence of (TFSI–) anions that balance the charge in PPyPIL was confirmed by EDX analysis. The electrical properties of PPyPIL in lithium bis(trifluoromethanesulfonyl)-imide (LiTFSI) aqueous and propylene carbonate solutions were examined with cyclic voltammetry (CV), chronoamperometry, and chronopotentiometry. The blend of PPyPIL had mixed electronic/ionic conductive properties that were strongly influenced by the solvent. In aqueous electrolyte, the electrical conductivity was 30 times lower and the diffusion coefficient 1.5 times higher than in the organic electrolyte. Importantly, the capacity, current density, and charge density were found to stay consistent, independent of the choice of solvent.

scholarly journals Synthesis of New Fused Benzothiadiazepines and Macrocyclic Sulfamides Starting from N,N-Disubstituted Sulfamides and N(Boc)-Sulfamides

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Mohamed Dehamchia ◽  
Zine Regainia
Keyword(s):  
Mass Spectrometry ◽  
Wide Spectrum ◽  
Building Blocks ◽  
Pharmacological Activities ◽  
Chemical Structures ◽  
New Chemical Entities ◽  
One Step ◽  
New Compounds

Herein, we describe an efficient one-step synthesis of new fused benzothiadiazepine-1,1-dioxides and macrocyclic sulfamides. The synthesis of these compounds was achieved in moderate yields starting from previously described N,N′-disubstituted symmetric sulfamides and N-tert-butoxycarbonyl, N′-alkyl sulfamide. The chemical structures of all the new compounds reported in this work were confirmed by NMR, IR, and mass spectrometry. These compounds are beneficial building blocks that can be used in deriving new chemical entities that exert a wide spectrum of pharmacological activities.

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