A simple and efficient procedure for the synthesis of symmetricalbis-Schiffbases has been described that employs a condensation reaction of symmetrical primary bis-amine of 5,5′-methylenebis(2-aminothiazole) with a series of aromatic aldehyde derivatives under solvent-free conditions at elevated temperature. The advantages of these reactions are simplicity of the reaction procedure, short reaction
Novelsymmetricalbis-Schiffbases have been prepared cleanly and efficiently in the presence of formic acid catalyst in methanol from the reaction of symmetrical primary bis-amine of 5,5′-methylenebis(2-aminothiazole) (1) and a series of aromatic aldehyde derivatives under mild conditions. The advantages of this reaction are simplicity of the reaction procedure, simple work-up and pure products with
A green and operationally simple approach for the library synthesis of novel bis-heteroarylaminomethylnaphthoquinone derivatives by a one-pot pseudo five-component domino condensation reaction of 5,5′-methylenebis(thiazol-2-amine), 2-hydroxy-1,4-naphthoquinone and various aromatic aldehydes in the presence of formic acid as the catalyst was developed. All reactions were performed in ethanol at room