Abstract
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. [reaction: see text]
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