The Role of Oxygen in the Electrochemical Reduction of Ethyl 2-(2-(Bromomethyl)phenoxy)acetate at Carbon Cathodes in Dimethylformamide
作者:Tamir Simon、Antonio Vasquez、Austin R. Kelcher、Jacob A. Olivares、Chang Ji
DOI:10.1149/1945-7111/ab72ef
日期:2020.1.3
halides in aprotic solvents. Bulk electrolyses of ethyl 2-(2-(bromomethyl)phenoxy)acetate were carried out in the absence and presence of oxygen. The product distributions were obtained by gas chromatograph (GC) as well as gas chromatograph coupled to a mass spectrometer (GC−MS). Two bicyclic compounds, ethyl 2,3-dihydro-1-benzofuran-2-carboxylate and ethyl benzofuran-2-carboxylate, were found to be formed
采用循环伏安法 (CV) 和可控电位电解法 (CPE) 来检测 2-(2-(溴甲基)苯氧基) 乙酸乙酯在含有四甲基四氟硼酸铵 (TMABF4) 作为电解质的二甲基甲酰胺 (DMF) 中在碳阴极处的直接还原反应. 基板的循环伏安图显示单个不可逆阴极波,其峰值电位为 –1.75 V vs SCE,这是在非质子溶剂中还原有机卤化物的特征。2-(2-(溴甲基)苯氧基)乙酸乙酯的本体电解在不存在和存在氧气的情况下进行。通过气相色谱仪 (GC) 以及与质谱仪 (GC-MS) 耦合的气相色谱仪获得产物分布。两种双环化合物,2,3-二氢-1-苯并呋喃-2-甲酸乙酯和苯并呋喃-2-甲酸乙酯,发现在氧气存在下以超过 40% 的总产率形成。在此研究的基础上,提出并讨论了氧在其中起重要作用的反应机理。