A highly chemoselective and regioselective method for the synthesis of dioxopropellanes
developed by reaction of the Knoevenagel adducts of acenaphthoquinone (and ninhydrin)
and malononitrile, with 3-oxo-3-arylpropionitriles in 70% aqueous MeOH at room temperature,
is reported.
Key words
dioxapropellane - acenaphthoquinone - chemoselective - regioselective