Synthesis Of Diazafluorene- And Diazafluorenone-N,N '-Dioxides Using Hof Center Dot Ch3cn

A variety of diazafluorenes and diazafluorenones were oxidized using the HOF center dot CH3CN complex to form the corresponding N,N'-dioxide derivatives under mild conditions. The products exhibit red-shift absorptions in the UV/visible spectrum relative to the parent compounds. Many such oxidations could not be achieved with any other oxygen-transfer agent. (C) 2010 Elsevier Ltd. All rights reserved.