Facile Synthesis of α-Hydroxy-α-Methyl Carboxylic Acids by Electrochemical Carboxylation of Methyl Aryl Ketones
作者:Janmanchi Damodar、Srinivasulu Reddy Krishna Mohan、Srinivasulu Reddy Jayarama Reddy
DOI:10.1055/s-2002-20042
日期:——
carboxylation of methyl aryl ketones in the presence of atmospheric pressure of carbon dioxide using platinum cathode and dissolved magnesium anode at constant current density of 10 mA/cm 2 gave the corresponding α-hydroxy-α-methyl carboxylic acids in 79-84% isolated yields. The precursor of cicloprofen, α-hydroxy-α-methylfluorene-2-acetic acid (1a) and biprofen, α-hydroxy-α-methybiphenyl-4-acetic acid (2a) were
在大气压二氧化碳存在下,使用铂阴极和溶解的镁阳极在 10 mA/cm 2 的恒定电流密度下对甲基芳基酮进行电化学羧化,得到相应的 α-羟基-α-甲基羧酸,分离率为 79-84%产量。通过与2-乙酰芴 (1) 和 4-乙酰基联苯 (2)。循环伏安研究表明,该反应是可逆的,表明甲基芳基酮优先产生稳定的阴离子自由基,并且在这些电化学羧化反应中不会进一步添加二氧化碳。