γ-Lactam Synthesis via C−H Insertion: Elaboration of <i>N</i>-Benzyl Protecting Groups for High Regioselectivity toward the Total Synthesis of Rolipram
作者:Cheol Hwan Yoon、Advait Nagle、Chiliu Chen、Drashti Gandhi、Kyung Woon Jung
DOI:10.1021/ol0345834
日期:2003.6.1
By intramolecular C-H Insertion of alpha-diazo-alpha-(phenylsulfonyl)acetamides, gamma-lactams such as the antidepressant agent rolipram were efficiently synthesized in a highly regioselective manner. N-Benzyl moieties were elaborated as amide protecting groups to enhance regioselectivity in C-H activation as well as chemoselectivity over addition reactions.