Zirconium (IV) tetradentate Schiff base (salphen) complex has been successfully used for efficient condensation
of various 1,2-diamine and 1,2- dicarbonyl compounds in EtOH as a standard green solvent under mild conditions.
The investigation of turnover number and reusability of the catalyst indicate well the high efficiency and relative stability
of the Zr-complex in this reaction.
Keywords: Quinoxaline derivatives, salphen, Schiff base, zirconium complexes
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