Remote Directed Metalation of Biaryl o-Carbamates. Ring to Ring Carbamoyl Transfer Route to Biaryls, Dibenzopyranones, and the Natural Fluorenone Dengibsin

Article abstract of DOI:10.1021/jo00028a004

A new remote metalation, carbamoyl transfer process (Scheme I), is demonstrated and elaborated for the regiospecific synthesis of highly hindered biaryls, dibenzopyranones (Table I), and the naturally occurring fluorenone dengibsin (15).