Chemistry Letters, Vol.32, No.7, 614-615, 2003
A novel ring expansion of the holey ketolactam derivative of C-60
The migrative addition reaction of phenylhydrazine to the ketolactam derivative of C-60 occurred with a regioselective cage scission to give a 15-membered ring-opened fullerene bearing a methylene carbon and an acenaphthenequinone monophenylhydrazone unit along the orifice.