Design of a Copper(II) Complex with Tetradentate Bis‐Benzotriazole‐Appended Bipyridine Ligand and its Catalytic Application in A3 Coupling Reaction

In this report, a Cu(II) complex Cu‐L4 containing a new tetradentate benzotriazole‐appended bipyridine ligand was synthesized and characterized fully via spectroscopic and crystallographic techniques. The crystal structure of the complex revealed that the ligand is bound to copper in a tetradentate...

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Bibliographic Details
Published in:European journal of inorganic chemistry 2024-06, Vol.27 (16), p.n/a
Main Authors: Pandey, Sharmila, Ray, Saswati, Mandal, Tanmoy
Format: Article
Language:English
Subjects:
A3 coupling
Aldehydes
Alkynes
Amines
Benzotriazole
Chemical reactions
coordination chemistry
Copper
Coupling
Crystal structure
Crystallography
Ligands
tetradentate
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Summary:In this report, a Cu(II) complex Cu‐L4 containing a new tetradentate benzotriazole‐appended bipyridine ligand was synthesized and characterized fully via spectroscopic and crystallographic techniques. The crystal structure of the complex revealed that the ligand is bound to copper in a tetradentate fashion in a plane and the axial positions are occupied by an anion and a solvent molecule, resulting in a distorted octahedral geometry of the complex in solid‐state. This air‐stable complex was utilized as homogeneous precatalyst for the synthesis of several propargylamine derivatives by 3‐component A3 coupling reactions of aldehydes, amines, and alkynes under aerial atmosphere. A discrete copper(II) complex Cu‐L4 has been synthesized where bis‐benzotriazole‐appended bipyridine ligand coordinated to the Cu(II) ion in tetradentate fashion, occupying a square‐based plane. The axial positions were occupied by oxygen atoms of a coordinated perchlorate ion and a water molecule. The complex has been demonstrated as effective precatalyst in A3 coupling reactions.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.202400052