Bis- and tris-(methylphosphonic) acid derivatives of a 14-membered tetraazamacrocycle containing pyridine: synthesis, protonation and complexation studies

2004 ◽  
pp. 1812-1822 ◽  
Author(s):  
Krassimira P. Guerra ◽  
Rita Delgado ◽  
Luís M. P. Lima ◽  
Michael G. B. Drew ◽  
Vítor Félix
Keyword(s):  
Methylphosphonic Acid ◽  
Complexation Studies ◽  
Derivatives Of ◽  
Pyridine Synthesis

Functionalized phosphorus derivatives of Salpen-like compounds: Synthesis and preliminary complexation studies

2006 ◽  
Vol 691 (7) ◽  
pp. 1333-1340 ◽  
Author(s):  
Alexandrine Maraval ◽  
Germinal Magro ◽  
Valérie Maraval ◽  
Laure Vendier ◽  
Anne-Marie Caminade ◽  
...  
Keyword(s):  
Complexation Studies ◽  
Derivatives Of

Phosphonate monoesters on a thiacalix[4]arene framework as potential inhibitors of protein tyrosine phosphatase 1B

2015 ◽  
Vol 13 (33) ◽  
pp. 8803-8806 ◽  
Author(s):  
Viacheslav V. Trush ◽  
Sergiy G. Kharchenko ◽  
Vsevolod Yu. Tanchuk ◽  
Vitaly I. Kalchenko ◽  
Andriy I. Vovk
Keyword(s):  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Protein Tyrosine Phosphatase ◽  
Tyrosine Phosphatase ◽  
Methylphosphonic Acid ◽  
Protein Tyrosine Phosphatase 1B ◽  
Protein Tyrosine ◽  
Potential Inhibitors ◽  
Derivatives Of

Monoester derivatives of thiacalix[4]arene tetrakis(methylphosphonic) acid were found to be capable of inhibiting protein tyrosine phosphatase 1B. In addition, these compounds can strongly bind to human serum albumin.

Complexation studies of 3-substituted β-diketones with selected d- and f-metal ions

2011 ◽  
Vol 65 (2) ◽  
Author(s):  
Grzegorz Pawlicki ◽  
Bartosz Staniszewski ◽  
Katarzyna Witt ◽  
Włodzimierz Urbaniak ◽  
Stefan Lis
Keyword(s):  
Metal Ions ◽  
Absorption Spectra ◽  
Lanthanide Ions ◽  
Computer Assisted ◽  
Hypersensitive Transition ◽  
Complexation Studies ◽  
Target Factor Analysis ◽  
Derivatives Of ◽  
Hypersensitive Transitions

AbstractResults of spectroscopic investigations related to complex compositions of 3-substituted derivatives of pentane-2,4-dione (β-diketonate) complexes with chosen d- and f-metal ions are presented. Ligands 3-allylacetylacetone (3all-acac) and 3-benzylacetylacetone (3ben-acac) were prepared and used for the complexation study with Cu(II), Co(II), Nd(III), and Ho(III) metal ions. Based on the absorption spectra of lanthanide ions in their hypersensitive transitions, with the use of computer assisted target factor analysis (CAT) and absorption spectra of the ligands with Cu(II) and Co(II), the verification of complex compositions and the determination of their stability constants were achieved. In case of Nd(III) and Ho(III) complexes with β-diketone ligands, absorption of their maxima were studied in the range of hypersensitive transitions 4 I 9/2 → 4 F 7/2 + 4 S 3/2 (λ max ∼ 734 nm and 748 nm) for Nd(III) and in the range of 435–465 nm, corresponding to the hypersensitive transition 5 G 6 → 5 I 8 (λ max ∼ 450 nm), for Ho(III).

Synthesis of Oligobipyridine Strands Bearing Nucleoside and Amino Acid Side Chains

1996 ◽  
Vol 49 (10) ◽  
pp. 1023 ◽  
Author(s):  
MM Harding ◽  
JM Lehn
Keyword(s):  
Amino Acid ◽  
Nucleic Acids ◽  
Organic Solvents ◽  
Metal Ion ◽  
Metal Ion Complexation ◽  
Biological Targets ◽  
Complexation Studies ◽  
Amide Derivatives ◽  
Amino Acid Side Chains ◽  
Derivatives Of

The synthesis is reported of derivatives of 6,6'-dimethyl-2,2'-bipyridine in which adenosine, thymidine aid tryptophan substituents are introduced at the 4,4'-positions as amide derivatives. Artificial oligonucleoside strands derived from the corresponding trisbipyridyl ligand , in which three bipyridyl ligands are separated by methyleneoxy bridges, have been prepared. The solubility of the nucleoside-substituted ligands in organic solvents is poor, but acylation of the ribose or deoxyribose units present in the ligands provides a mechanism whereby organic solubility can be improved. These ligands may be used for the preparation of metallo-exoreceptors , with the potential for recognition of biological targets such as nucleic acids. Preliminary metal ion complexation studies have been carried out.

2,5-Disubstituted 1,3,4-oxadiazole derivatives of chromeno[4,3-b]pyridine: synthesis and study of antimicrobial potency

2016 ◽  
Vol 22 (3) ◽  
Author(s):  
Ghanshyam R. Jadhav ◽  
Dattatray G. Deshmukh ◽  
Vijay J. Medhane ◽  
Vishwas B. Gaikwad ◽  
Avinash D. Bholay
Keyword(s):  
Convenient Synthesis ◽  
Oxadiazole Derivatives ◽  
Derivatives Of ◽  
Antimicrobial Potency ◽  
Pyridine Synthesis

AbstractA convenient synthesis of 1,3,4-oxadiazole containing derivatives of chromeno[4,3-

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