Direct Conversion of N-Alkoxyamides to Carboxylic Esters through Tandem NBS-Mediated Oxidative Homocoupling and Thermal Denitrogenation

作者:Zhang Ningning; Yang Rui; Zhang Negrerie Daisy; Du Yunfei*; Zhao Kang
来源:Journal of Organic Chemistry, 2013, 78(17): 8705-8711.
DOI:10.1021/jo401435v

摘要

Treatment of N-alkoxyamides with NBS in toluene was found to conveniently afford the corresponding carboxylic esters, including those bearing a bulky or long-chain substituent, in satisfactory to excellent yields. This approach not only represents a convenient and economic approach to a direct transformation of an alkoxyamide moiety into the carboxylic ester functional group, via oxidative homocoupling and the subsequent thermal denitrogenation, but also facilitates the synthesis of sterically hindered carboxylic esters.