l-Proline catalyzed direct diastereoselective aldol reactions of α-amino aldehydes with cyclic ketones have been described and utilized further for the stereoselective synthesis of the 2-amino-1,3,4-triol unit as the ...
The Label-Assisted Laser Desorption/Ionization (LA-LDI) technique has recently been applied to the detection of small molecules through a Time of Flight (TOF) mass spectrometric measurement. By excluding the external matrix, ...
Chemoselective protein labeling is a valuable tool in the arsenal of modern chemical biology. The unnatural amino acid mutagenesis technology provides a powerful way to site-specifically introduce nonnatural chemical ...
Through the present study, variation in land use, land cover (LULC) with change in scale is discussed. The authors carried out the visual interpretation with the aid of supervised classification, aiming to obtain LULC ...
The MALDI-based mass spectrometry, over the last three decades, has become an important analytical tool. It is a gentle ionization technique, usually applicable to detect and characterize analytes with high molecular weights ...
A general method has been fabricated to achieve normal as well as inverted core–shell architectures of silver/gold through a layer-by-layer deposition technique on a commercial anion exchange resin. Electrostatic field ...
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A fast ionic composite is prepared by dispersion of Ionic liquid [Bmim][PF6] in Li2SO4⎯Li2O⎯P2O5 glass matrix by mixing and through grinding. Amorphous/glassy nature of the samples is confirmed by X-Ray diffraction (XRD). ...
The ligand- and base-free, Pd-catalyzed synthesis of useful symmetrical and unsymmetrical biaryls in high yields from stable diaryliodonium salts is developed. The reaction is catalyzed by a recyclable Pd/polyethylene ...
A simple and highly efficient protocol for the regioselective synthesis of azole-substituted imidazo[1,2-a]pyridines has been developed using a ligand-free, copper-catalyzed Ullmann-type C–N coupling of 2-(2-bromophenyl) ...
Organocatalytic domino reactions involving amine activation of carbonyl compounds have become the latest chemical technology towards the design and development of useful synthetic methods. In this direction, linear dialdehydes ...
The recently proposed local hard−soft acid−base principle characterizes the reactive centers of two systems on the basis of equal Fukui functions or/and equal local softnesses. We make a quantum chemical study of this ...
Lewis acidity of alkali cation-exchanged zeolite is studied using local reactivity descriptors based on hard-soft acid–base (HSAB) concept. The local softness for nucleophilic attack (sx+), local softness for electrophilic ...
The DFT-based reactivity descriptors “local softness” and “local hardness” are used as reactivity indices to predict the reactivity sequences (both intramolecular and intermolecular) of carbonyl compounds toward nucleophilic ...
Zero-mode waveguide (ZMW) nano-apertures milled in metal films were proposed to improve the Förster resonance energy transfer (FRET) efficiency and enable single-molecule FRET detection beyond the 10 nm barrier, overcoming ...
We report the magnetic proximity effect in a ferrimagnetic Fe3O4 core/ferrimagnetic γ-Mn2O3 shell nanoparticle system, in terms of an enhancement of the Curie temperature (Tc) of the γ-Mn2O3 shell (∼66 K) compared to its ...
We report the magnetic proximity effect in a ferrimagnetic Fe3O4 core/ferrimagnetic γ-Mn2O3 shell nanoparticle system, in terms of an enhancement of the Curie temperature (Tc) of the γ-Mn2O3 shell (∼66 K) compared to its ...
A survey is made of the theory and applications ofEPR andNMR absorption lineshapes observed in powdered and amorphous materials. The ‘spin Hamiltonian’ and ‘resonance condition’ formalisms are reviewed, andepr andnmr ...
A general and practical route for the high yield oxidative conversion of readily accessible 1,4-dihydropyridines to the corresponding pyridines is described using a relatively benign oxidant, manganese triacetate.
A concise synthesis of 2-arylbenzoxazoles, 5a-f, is described that occurs via the oxidative cyclization of Schiff's bases, 1a-f, using relatively benign reagent, manganese triacetate.