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Clean, practical, and efficient electrochemical synthesis of pharmaceutically relevant 4H-pyran derivatives by one-pot three-component combination of an aryl aldehyde, malononitrile, and a dicarbonyl compoundis developed. The synthesis is performed in ethanol with lithium perchlorate as a supporting electrolyte in an undivided cell on a platinum electrode under constant potential electrolysis conditions. [ABSTRACT FROM AUTHOR]

A new series of copolymers, obtained by reacting aniline as electron donor with thiophene as electron acceptor in a donor-acceptor structure (polythio- co-ani), were synthesized via electrochemical polymerization using acetonitrile as a solvent and lithium perchlorate as supporting electrolyte. The copolymer have better solubility in DMSO and KOH than the corresponding homopolymers. Copolymerization of aniline and thiophene was studied by UV-visible and FT-IR spectroscopy. In order to analyze their structure and characteristics X-ray diffraction analysis was applied and the samples were photographed under scanning electron microscope (SEM) for microstructure analysis and morphological property. Electrochemical properties were observed by cyclic voltammetry.. [ABSTRACT FROM AUTHOR]