Carboxylate ion dependency in the Cu(II) catalysed asymmetric Henry reaction: Structural characterisation of a tridentate Schiff base complex containing a coordinated carboxylic acid

2017 ◽  
Vol 31 (12) ◽  
pp. e3831 ◽  
Author(s):  
Arzu Akıncı ◽  
Duygu Barut Celepci ◽  
Leman Karadeniz ◽  
Neslihan Korkmaz ◽  
Muhittin Aygün ◽  
...  
Keyword(s):  
Schiff Base ◽  
Carboxylic Acid ◽  
Schiff Base Complex ◽  
Henry Reaction ◽  
Base Complex ◽  
Structural Characterisation ◽  
Tridentate Schiff Base

A novel copper(ii) complex with an unsymmetrical tridentate-Schiff base: synthesis, crystal structure, electrochemical, morphological and electrocatalytic behaviors toward electroreduction of alkyl and aryl halides

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 82894-82905 ◽  
Author(s):  
Ali Ourari ◽  
Wassila Derafa ◽  
Djouhra Aggoun
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Complex ◽  
Aryl Halides ◽  
Base Complex ◽  
Tridentate Schiff Base

This work describes the synthesis of a new unsymmetrical tetradentate copper(ii) Schiff base complex Cu(L)(Py)(ClO4) containing N3O donor atoms.

scholarly journals Copper Tridentate Schiff Base Complex Supported on SBA-15 as Efficient Nanocatalyst for Three-Component Reactions under Solventless Conditions

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2458 ◽  
Author(s):  
Elham Diarjani ◽  
Fatemeh Rajabi ◽  
Asieh Yahyazadeh ◽  
Alain Puente-Santiago ◽  
Rafael Luque
Keyword(s):  
Schiff Base ◽  
Heterogeneous Catalysts ◽  
Condensation Reaction ◽  
Schiff Base Complex ◽  
The Novel ◽  
Average Pore ◽  
Base Complex ◽  
Biginelli Condensation ◽  
Tridentate Schiff Base ◽  
Solvent Free Synthesis

The anchorage of a supported copper Schiff base complex on SBA-15 materials provides highly efficient heterogeneous catalysts towards the solvent-free synthesis of dihydropyrimidinones derivatives via the Biginelli condensation reaction. The novel nanocatalysts exhibited a highly ordered mesostructure with a surface area of 346 m2g−1 and an average pore diameter of 8.6 nm. Additionally, the supported copper nanocatalysts were reused at least ten times, remaining almost unchanged from the initial activity. Both the mesoporous scaffold and the tridentate Schiff base ligand contributed to the stabilization of copper species.

Stereoselective interaction of a tridentate Schiff base complex of nickel(II) and amino acids

1979 ◽  
Vol 57 (8) ◽  
pp. 883-885 ◽  
Author(s):  
B. Erno ◽  
R. B. Jordan
Keyword(s):  
Amino Acids ◽  
Schiff Base ◽  
Amino Acid ◽  
Schiff Base Complex ◽  
Salt Crystallization ◽  
Sensitive Test ◽  
Dilute Acid ◽  
Base Complex ◽  
Tridentate Schiff Base ◽  
Perchlorate Salt

It has been observed that a tridentate Schiff base complex of nickel(II), triaquotribenzo-[b,f,j][1.5.9]-triazacyclodecinenickel(II), commonly called (TRI)Ni(OH2)32+, shows substantial stereoselectivity on complexing with several amino acids. This provides a convenient way to resolve (TRI)Ni(OH2)32+ using histidine as a resolving agent, and either ion exchange or perchlorate salt crystallization techniques.The resolved (TRI)Ni(OH2)32+ may then be used to resolve other amino acids or as a sensitive test of the stereochemistry of an amino acid. The test can be done on milligram quantities because of the insolubility of the complex perchlorate salt and because of the relatively large molecular rotation (2 × 105 deg at 283 nm) of (TRI)Ni(OH2)32+. The amino acid is easily released by treatment of the complex with dilute acid (Ph ≈ 2). The procedure has been tested with histidine, tyrosine, methionine, and phenylglycine.

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