Fast synthesis of benzofluorenes by selenium-mediated carbocyclizations.
When one ring is not enough: A new double cyclization of stilbene derivatives results in benzo[b]fluorenes via dihydronaphthalenes. The presence of a selenium electrophile and a Lewis acid are crucial for the formation of the C-C bonds.
Shahzad
Sohail A
SA
School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK.
Wirth
Thomas
T