Self-assembled copper(ii) metallacycles derived from asymmetric Schiff base ligands: efficient hosts for ADP/ATP in phosphate buffer

2015 ◽  
Vol 44 (39) ◽  
pp. 17152-17165 ◽  
Author(s):  
Amit Kumar ◽  
Rampal Pandey ◽  
Ashish Kumar ◽  
Rakesh Kumar Gupta ◽  
Mrigendra Dubey ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Phosphate Buffer ◽  
Schiff Base Ligands ◽  
Self Assembled

Tetranuclear supramolecular copper(ii) complexes derived from asymmetric Schiff bases have been synthesized, characterized and demonstrated as size selective hosts for ADP/ATP.

scholarly journals A novel approach toward the synthesis of some new tridentate Schiff bases from anil-like compounds

2016 ◽  
Vol 81 (10) ◽  
pp. 1111-1119 ◽  
Author(s):  
Fatemeh Bagheri ◽  
Abolfazl Olyaei
Keyword(s):  
Schiff Base ◽  
Formic Acid ◽  
Schiff Bases ◽  
Condensation Product ◽  
Reaction Times ◽  
Acid Catalyst ◽  
Schiff Base Ligands ◽  
Novel Approach ◽  
Solvent Free Conditions ◽  
Novel Method

A novel method was developed for synthesizing a series of new three dentate Schiff base ligands starting from hydroxynaphthalidene pyrimidinyl amines with o-phenylenediamines or o-aminophenol or 2-amino-3-hydroxy-pyri-dine in the presence of formic acid catalyst under solvent-free conditions. In these reactions [1+1] condensation product as half-unit ligand was obtained. Moreover, the reaction of hydroxynaphthalidene pyrimidinyl amines with 3,4-diamino-pyridine and 1,8-naphthalenediamine lead to the formation of C2-naphthylated imidazopyridine and dihydropyrimidine, respectively. The attractive features of this protocol are: use of inexpensive catalyst, operationally simple, short reaction times, easy handling, and good yields.

Phosphine-assisted C–H bond activation in Schiff bases and formation of novel organo cobalt complexes bearing Schiff base ligands

2018 ◽  
Vol 42 (6) ◽  
pp. 4646-4652 ◽  
Author(s):  
Hua Zhang ◽  
Junyang Xing ◽  
Yanhong Dong ◽  
Shangqing Xie ◽  
Shishuai Ren ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Bond Activation ◽  
Cobalt Complexes ◽  
Schiff Base Ligands

The sp2 C–H bond activation of the HCN moiety in diphenylphosphino benzalimines was realized using CoMe(PMe3)4 with the elimination of methane.

para metallation of 3-acetyl-chromen-2-one Schiff bases in tetranuclear palladacycles: focus on their biomolecular interaction and in vitro cytotoxicity

2019 ◽  
Vol 48 (33) ◽  
pp. 12496-12511 ◽  
Author(s):  
G. Kalaiarasi ◽  
S. Dharani ◽  
V. M. Lynch ◽  
R. Prabhakaran
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
In Vitro Cytotoxicity ◽  
Biomolecular Interaction ◽  
Schiff Base Ligands

Three tetranuclear (1–3) complexes and a mononuclear (4) palladium(ii) complex were synthesized from 3-acetyl-chromen-2-one Schiff base ligands [H2-3MAC-Rtsc] (where R = H; CH3; C2H5[H2-3MAC-etsc] or C6H5) and potassium tetrachloropalladate.

Schiff base insertion in titanium alkyls; reduction of imine functions by benzyl addition

1999 ◽  
Vol 77 (12) ◽  
pp. 2095-2098 ◽  
Author(s):  
Simon J Coles ◽  
Michael B Hursthouse ◽  
David G Kelly ◽  
Andrew J Toner ◽  
Neil M Walker
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Nucleophilic Additions ◽  
Schiff Base Ligands ◽  
Base Insertion

TiBz4 reacts with N-2-fluorenyl(salicylideneimine) to afford a crystallographically characterized titanium(IV) complex containing two conventional bidentate Schiff base ligands and two O-bound ligands in which the imine function has been reduced by the addition of benzyl and hydrogen moieties.Key words: insertion, nucleophilic additions, Schiff bases, titanium

The Electrochemical Synthesis of Neutral Zinc(II) Complexes of Schiff Base Ligands: The Crystal Structure of Bis[N-(4-methylphenyl)salicylaldiminato]zinc(II)

1988 ◽  
Vol 43 (5) ◽  
pp. 611-615 ◽  
Author(s):  
T. Sogo ◽  
J. Romero ◽  
A. Sousa ◽  
A. de Blas ◽  
M. L. Durán ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Bases ◽  
Electrochemical Synthesis ◽  
Chemical Properties ◽  
Zinc Atom ◽  
Schiff Base Ligands ◽  
Space Group ◽  
X Ray ◽  
Physico Chemical

Abstract The electrochemical synthesis and physico-chemical properties of neutral zinc(II) complexes of bidentate Schiff bases derived from salicylaldehydes are presented together with the X-ray structure of bis[N-(4-methylphenyl)salicylaldiminato]zinc(II). The crystal is monoclinic, a = 21.877(3), b = 8.801(2), c = 12.027(5) Å, β = 96.55(3)°, space group C2/c. The complex is a monomer, and the zinc atom is tetrahedrally coordinated.

Dynamic imine chemistry in metal–organic polyhedra

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 67011-67030 ◽  
Author(s):  
Harsh Vardhan ◽  
Akshay Mehta ◽  
Ipsita Nath ◽  
Francis Verpoort
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligands ◽  
Metal Organic ◽  
Self Assembled

This review highlights the intercession of Schiff base ligands in the preparation of self-assembled architectures mainly metal–organic polyhedra and describes their unprecedented role in various key applications.

Copper(II)-promoted solvolyses of nickel(II) complexes. II. Tridentate and tetradentate Schiff base ligands containing remote substituents

1973 ◽  
Vol 26 (7) ◽  
pp. 1459 ◽  
Author(s):  
WW Fee ◽  
JD Pulsford ◽  
PD Vowles
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Rate Constants ◽  
Dimethyl Sulphoxide ◽  
Common Mechanism ◽  
Schiff Base Ligands ◽  
Dissociative Mechanism ◽  
Tetradentate Schiff Base ◽  
Kinetics Of ◽  
Mechanism Operative

The kinetics of copper(II)-promoted solvolyses of two series of nickel(II) complexes containing polydentate Schiff bases with various remote substituents, in dimethyl sulphoxide (dmso), are discussed from the viewpoints of rate constants and of enthalpies and entropies of activation. Appearance of an isokinetic relation for the tridentate (ONS donors) reactants may indicate a common mechanism operative within this reactant series. Rate constants appear related to σp values in such a way that a dissociative mechanism appears important for the tridentate reactants, while characterization in terms of associative behaviour is indicated for the tetradentates.

Self-assembled half-sandwich polyhedral cages via flexible Schiff-base ligands: an unusual macrocycle-to-cage conversion

2016 ◽  
Vol 45 (35) ◽  
pp. 13675-13679 ◽  
Author(s):  
Jing-Jing Liu ◽  
Yue-Jian Lin ◽  
Zhen-Hua Li ◽  
Guo-Xin Jin
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligands ◽  
Self Assembled ◽  
Half Sandwich

Half-sandwich M6(L1)4 octahedral and M8(L2)4 cubic cages have been assembled by flexible Schiff-base ligands upon coordination to Cp*Rh(iii) organometallic acceptors. In particular, the Rh(iii)-based half-sandwich M2(HL1)2 macrocycle rearranges in solution to give a M6(L1)4 cage.

scholarly journals Antibacterial Co(II), Ni(II), Cu(II) and Zn(II) complexes with biacetyl-derived Schiff bases

2010 ◽  
Vol 75 (8) ◽  
pp. 1075-1084 ◽  
Author(s):  
Muhammad Imran ◽  
Mitu Liviu ◽  
Shoomaila Latif ◽  
Zaid Mahmood ◽  
Imtiaz Naimat ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Bacterial Species ◽  
Electronic Spectroscopy ◽  
Salmonella Typhi ◽  
Schiff Base Ligands ◽  
No Donor

The condensation reactions of biacetyl with orthohydroxyaniline and 2-aminobenzoic acid to form bidendate NO donor Schiff bases were studied. The prepared Schiff base ligands were further utilized for the formation of metal chelates having the general formula [ML2.2H2O] where M = Co(II), Ni(II), Cu(II) and Zn(II) and L = HL1 and HL2. These new compounds were characterized by conductance measurements, magnetic susceptibility measurements, elemental analysis, and IR, 1H-NMR and electronic spectroscopy. Both Schiff base ligands were found to have a mono-anionic bidentate nature and octahedral geometry was assigned to all metal complexes. All the complexes contained coordinated water which was lost at 141-160 ?C. These compounds were also screened for their in-vitro antibacterial activity against four bacterial species, namely; Escherichia coli, Staphylococcus aureus, Salmonella typhi and Bacillus subtillis. The metal complexes were found to have greater antibacterial activity than the uncomplexed Schiff base ligands.

Transition metal complexes of symmetrical and asymmetrical Schiff bases as antibacterial, antifungal, antioxidant, and anticancer agents: progress and prospects

2015 ◽  
Vol 35 (4) ◽  
pp. 191-224 ◽  
Author(s):  
Ikechukwu P. Ejidike ◽  
Peter A. Ajibade
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Anticancer Agents ◽  
Oxygen Carrier ◽  
Radical Scavenging ◽  
Schiff Base Ligands ◽  
Dna Cleaving ◽  
The Past ◽  
Radical Scavenging Properties ◽  
Carrier Systems

AbstractThe huge research on Schiff base coordination complexes in the past few decades has given rise to several new molecules that have been of biological importance. The ease with which the Schiff base ligands are designed and prepared and their pattern is elucidated have made them to be referred to as “fortunate ligands” possessing azomethine derivatives, the C=N linkage that is essential for biological activity, including antibacterial, antifungal, antioxidant, anticancer, and diuretic activities. A variety of Schiff base and its complexes have been studied as model molecules for biological oxygen carrier systems. The uses of Schiff bases as DNA-cleaving agents and its mode of interaction and free-radical scavenging properties are described. The review encapsulates the applications of Schiff bases and their complexes.

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