| 초록 |
The electrochemical synthesis of organic compounds has been studied continuously because the synthesis using the electrochemical coversion has the advantage that several reaction is done by the only one step unlike a general organic synthesis. In this study, α-chloronaphtalene was converted into α-naphtalenecarboxylic acid electrochemically in supercritical fluid (CO2) [1]. CO2 which is used as a supercritical media and reactant in this reaction has been regarded as a suitable chemical for organic synthesis because it is nonflammable, nontoxic, inexpensive, and readily accessible to supercritical region. Especially, supercritical CO2 has interesting solvating characteristics and provide greatly increased mass transfer rates to an electrode in an electrochemical system. The electrocarboxylation of organic halides (in this study, α-chloronaphtalene) was carried out using acetonitrile solution containing Bu4NBF4 as a supportting electrolyte in a high-pressure view-cell equipped with an anode made of magnesium and a cathode made of platinum. Reaction temperature was 40 ℃, pressure was 85 bar, and constant voltages of 8 volt and 25 volt, and constant currents of 40 mA and 80 mA (3F/mol) were supplied. We can obtain α-naphtalenecarboxylic acid by electrocarboxylation of α-chloronaphtalene under supercritical condition.
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