Browsing by Author "Sah, Ajay Kumar"

Alanyl glycoconjugate: a selective receptor for free and protein-bound tryptophan

Sah, Ajay Kumar (ACS, 2013)

The free and protein-bound tryptophan (Trp) sensing ability of an alanyl-(4,6-O-ethylidene-β-D-glucopyranosylamine) derived chiral receptor (L-N2O2) has been explored using UV-vis absorption, fluorescence and mass spectroscopy. ...

Amine mediated proton transfer reaction and C–Cl bond activation of solventchloroform by a trinuclear copper(ii) complex of a glucopyranosylamine derived ligand

Sah, Ajay Kumar (RSC, 2006)

An amine mediated C–Cl bond activation process of the solvent chloroform has been explored by a coordinatively labile trinuclear Cu(II) complex, [Cu3(L1)2(MeOH)(H2O)] (1), derived from N-(3-tert-butyl-2-hydroxybenzyliden ...

Bis-(μ-saccharide-C-2-oxo) dinuclear Cu(ii) complexes of 4,6-O-butylidene/ethylidene-N-(α-hydroxynaphthylidene/o-hydroxybenzylidene/5-bromo-o-hydroxybenzylidene)-β-d-glucopyranosylamine: structural aspects and data correlations

Sah, Ajay Kumar (RSC, 2003)

A total of five dinuclear copper complexes were synthesized using 4,6-O-butylidene/ethylidene-N-(α-hydroxynaphthylidene/o-hydroxybenzylidene/5-bromo-o-hydroxybenzylidene)-β-D-glucopyranosylamine. Upon recrystallisation ...

Crystal structure of 4,6-O-ethylidene-N-(2-hydroxybenzylidene)-β-d-glucopyranosylamine

Sah, Ajay Kumar (Elsiever, 2002-01)

4,6-O-Ethylidene-N-(2-hydroxybenzylidene)-β-d-glucopyranosylamine was synthesized and characterized using analytical, spectral and single-crystal X-ray diffraction methods. The anomeric nature of the saccharide moiety was ...

Crystal-to-crystal transformation from tri- to mononuclear Cu(ii) complex with a sugar-derived ligandvia proton transfer reaction and rearrangement of hydrogen bonding networks†

Sah, Ajay Kumar (ACS, 2005)

Treatment of a glycosylamine derived Cu(II) complex with ethylamine resulted in crystal-to-crystal transformation from trinuclear complex [Cu3(L1)2(EtNH2)2(MeOH)2]x2MeOHxCHCl3 (2x2MeOHxCHCl3) to a dimeric structure of ...

C–H⋯Cl− hydrogen bonds in solution and in the solid-state: HgCl2 complexes with cyclen-based cryptands

Sah, Ajay Kumar (RSC, 2017)

Structural evidence is reported for C–H⋯Cl− hydrogen bonds in solution and in the solid state of HgCl2 complexes with cyclen-based cryptands. These cyclen-based cryptands (1) and (2) are bridged by di- and triethylene ...

Design, synthesis and evaluation of carbamoylmethylphosphine sulfide (CMPS)-based chelates for separation of lanthanides and actinides

Sah, Ajay Kumar (Elsiever, 2007-11)

C3-symmetric triphenoxymethane platforms were substituted with carbamoylmethylphosphine sulfide arms and these tris-CMPS compounds were evaluated as extractants for f-element metal ions from 1 M nitric acid solution. Their ...

Dinuclear Copper Complexes of N-(2-Hydroxybenzylidene or 5-Bromo-2-hydroxybenzylidene)-4,6-O-ethylidene-β-D-glucopyranosylamine: Coordination Variation and Structural Diversity

Sah, Ajay Kumar (CSJ, 2002)

Dinuclear Cu(II) complexes of N-(2-hydroxybenzylidene or 5-bromo-2-hydroxybenzylidene)-4,6-O-ethylidene-β-D-glucopyranosylamine with coordination variation and molecular and lattice structural variations are explored.

Double-armed and tetra-armed cyclen-based cryptands

Sah, Ajay Kumar (Taylor & Francis, 2017)

Double-armed and tetra-armed cyclen-based cryptands (1a–1d and 2) that bridge two aromatic rings by diethyleneoxy and triethyleneoxy units were prepared. The CSI-MS of 1:1 mixtures ([Ag+]/[ligand]) indicated that these new ...

First Crystallographic Investigation of Complexes of cis-VO2+, cis-MoO22+, and trans-UO22+ Species with Schiff-Base Molecules Derived from 4,6-O-Ethylidene-β-D-glucopyranosylamine

Sah, Ajay Kumar (EJIC, 2001-09)

The interaction of Schiff-base ligands derived from 4,6-O-ethylidene-β-D-glucopyranosylamine with cis-VO2+, cis-MoO22+, and trans-UO22+ species have been studied by isolating and characterizing the corresponding products. ...

Metal complexes of 4,6-O-ethylidene-β-d-glucopyranosylamine derivatives and their application in organic synthesis

Sah, Ajay Kumar (Elsiever, 2019-11-01)

Glycosylamine derivatives of 4,6-O-ethylidene-d-glucose have been used for complexing the alkali, alkaline earth and transition metal ions. Three different series of ligands have been reported where N-(o-carboxyphenyl)-4 ...

Metal-free synthesis of aminomethylated imidazoheterocycles: dual role of tert-butyl hydroperoxide as both an oxidant and a methylene source

Kumar, Anil; Sah, Ajay Kumar (RSC, 2018)

A novel and efficient aminomethylation approach has been developed for the regioselective functionalization of imidazoheterocycles under metal-free conditions. A wide range of imidazoheterocycles and 2/4-aminoazaheterocycles ...

Mo(VI) complex catalysed synthesis of sulfones and their modification for anti-HIV activitie

Sah, Ajay Kumar; Murugesan, Sankaranarayanan (Elsiever, 2020-04-05)

An efficient method for the synthesis of sulfones has been developed using sugar derived cis-dioxo molybdenum(VI) complex as catalyst and urea hydrogen peroxide as oxygen source. Present method is highly specific for sulfide ...

N-Glycoconjugates: Selective colorimetric chemosensors for aspartic acid and cysteine

Sah, Ajay Kumar (Elsiever, 2021-10-05)

Selective recognition of naturally occurring amino acids have been explored using five glycopeptide-based receptors with the help of UV-visible and 1H NMR spectroscopy, while structures of two glycopeptides have been ...

N-Glycosylamines of 4,6-O-ethylidene-α-D-glucopyranose: synthesis, characterisation and structure of CO2H, Cl and F ortho-substituted phenyl derivatives and metal ion complexes of the CO2H derivative

Sah, Ajay Kumar (RSC, 2000)

A saccharide based ligand suitable for metal binding (HLCOOH) has been synthesized using 4,6-O-ethylidene-α-D-glucopyranose (4,6-O-EGP) and anthranilic acid. A few analogous glycosylamines with chloro and fluoro ortho ...

Quinoline Glycoconjugates as Potentially Anticancer and Anti-Inflammatory Agents: An Investigation Involving Synthesis, Biological Screening, and Dockin

Dubey, Uma S.; Sah, Ajay Kumar; Shukla, Paritosh (ECSP, 2020-08-20)

The present work is a preliminary report of synthesis of a series of targeted 4,6-O-ethylidene-β-D-glucopyranosylamine glycoconjugate quinoline 4-carboxylic acid derivatives followed by a quick evaluation of their ...

Saccharide derived dinuclear Cu(II) complex: An efficient catalyst for oxidation of catechol and benzylic alcohols

Sah, Ajay Kumar; Kumar, Anil (Elsiever, 2012-01)

Catalytical aspect of 4,6-O-ethylidene-β-D-glucopyranosylamine derived dinuclear Cu(II) complex has been explored. The complex exhibits good catecholase like activity and oxidizes model substrate 3,5-di-tert-butylcatechol ...

Selective oxidation of organic sulfides to sulfoxides using sugar derived cis-dioxo molybdenum(vi) complexes: kinetic and mechanistic studies

Sah, Ajay Kumar (RSC, 2016)

Six Mo(VI) complexes of 4,6-O-ethylidene-β-D-glucopyranosylamine derived ligands have been used for the selective oxidation of five organic sulfides to corresponding sulfoxides. The structure of a new sulfide [(((2-(phen ...

Selective Retention of Methanol over Ethanol by a Cyclen-Based Cryptand/Copper(II) Complex

Sah, Ajay Kumar (ACS, 2013)

A cyclen-based cryptand (2) was prepared in a two-step synthesis from dioxocyclen. When a Cu(CF3SO3)2 complex with 2 was prepared in methanol, the 2/Cu(CF3SO3)2 complex incorporated one methanol in the cavity formed by the ...

Selective Synthesis of Bis(indolyl)methanes Under Solvent Free Condition Using Glucopyranosylamine Derived cis-Dioxo Mo(VI) Complex as an Efficient Catalyst

Sah, Ajay Kumar; Kumar, Anil (Springer, 2015-11-07)

cis-Dioxomolybdenum(VI) complex of 4,6-O-ethylidene-β-d-glucopyranosylamine derived ligand has been used as an efficient catalyst in the selective synthesis of a series of bis(indolyl)methanes (BIMs) by condensing indole ...

Browsing by Author "Sah, Ajay Kumar"

Browsing by Author "Sah, Ajay Kumar"

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