Efficient and Highly Selective Oxidation of Primary Alcohols to Aldehydes by <i>N</i>-Chlorosuccinimide Mediated by Oxoammonium Salts
作者:Jacques Einhorn、Cathy Einhorn、Fabien Ratajczak、Jean-Louis Pierre
DOI:10.1021/jo9609790
日期:1996.1.1
6-Tetramethyl-1-piperidinyloxy catalyzes efficient oxidation of primary alcohols to aldehydes by N-chlorosuccinimide, in a biphasic dichloromethane-aqueous pH 8.6 buffer system in the presence of tetrabutylammonium chloride. Aliphatic, benzylic, and allylic alcohols are readily oxidized with no overoxidation to carboxylic acids. Secondary alcohols are oxidized to ketones with a much lower efficiency
在氯化四丁基铵存在下的双相二氯甲烷-水溶液pH 8.6缓冲体系中,N-氯代琥珀酰亚胺催化2,2,6,6-四甲基-1-哌啶基氧基将伯醇有效氧化为醛。脂肪醇,苄醇和烯丙基醇很容易被氧化,而不会过度氧化成羧酸。仲醇被氧化成酮的效率要低得多。当伯醇在仲醇存在下被氧化时,观察到很高的化学选择性。伯-仲二醇选择性地转化为羟醛,在某些情况下,没有可检测到的异构化酮醇的形成。