Electrochemical behaviour of 5-methoxy-5,6-bis(3-nitropheyl-4,5-dihydro-1,2,4-triazine-3(2H))-thione in presence of salicylaldehyde on zinc cathode with surface morphology and biological activity

Abstract

This paper presents an innovative, green and organic electro synthesis in order to prepare Schiff base product by the reduction of 5-methoxy-5,6-bis (3-nitropheyl-4,5-dihydro-1,2,4-triazine-3(2<em>H</em>))-thione followed by the condensation on zinc cathode in aqueous alkaline ethanol media in the presence of salicylaldehyde at room temperature. The main characteristic of this proposal is the electro-reduction and electro-condensation. The bulk electrolysis at constant potential was performed in a three-electrode undivided cell in order to prepare Schiff base. In this sense, good yields and easy purification were achieved. Results indicate that thereduction produced high current in the cell and succeeded a green chemistry process. Products were characterized by IR, NMR (¹H, ¹³C), and SEM.