Enantioselective synthesis of spirocyclic benzopyranones by rhodium-catalyzed intermolecular [4+2] annulation.
Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
Daiki
D
Hojo
Keiichi
K
Noguchi
Masao
M
Hirano
Ken
K
Tanaka