Journal
CHEMELECTROCHEM
Volume 9, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202101381
Keywords
Benzo[c]cinnolines; Carbon dioxide; 2; 2'-Dinitrobiphenyl; Electrochemical reduction
Categories
Funding
- National Nature Foundation of China [22076001]
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Benzo[c]cinnolines, important compounds in medicinal chemistry, possess promising anticancer and antioxidant activity. Electrochemical reduction of DNBP in the presence of CO2 provides a theoretical and practical path for the synthesis of bioactive benzo[c]cinnolines with high selectivity.
Benzo[c]cinnolines are an essential framework material in medicinal chemistry owing to its promising anti-cancer and antioxidant activity, and good pharmacological properties. Accordingly, benzo[c]cinnolines are synthesized through electrochemical reduction of 2,2'-dinitrobiphenyl (DNBP) in aprotic solvents with CO2. Cyclic voltammetry (CV), cyclic voltabsorptometry (CVA), derivative cyclic voltabsorptometry (DCVA) techniques, and in-situ FT-IR spectroelectrochemistry are used to investigate the mechanism of electrochemical reduction of DNBP in the presence of CO2. It is a reversible 2-electron-transfer reaction in an aprotic solution of DMSO in the absence of CO2, while it turned into a completely irreversible 8-electron process in the presence of CO2. Benzo[c]cinnolines were finally obtained by potentiostatic electrolysis with conversion rate of 99 %, indicating the high selectivity of this reaction. Above all, DNBP can be electrochemically reduced into BC in the presence of CO2, providing a theoretical and practical path for electrochemical synthesis of bioactive benzo[c]cinnolines (BC).
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