New one-pot method for the synthesis of pyrrolidinofullerenes†
Abstract
The reaction of fullerene C60 with isocyanoacetates and EtMgBr in the presence of stoichiometric amounts of Ti(Oi-Pr)4 was studied for the first time. Unlike esters and nitriles of carboxylic acids and isonitriles, isocyanoacetates were found to react with C60 under the developed conditions to give N-unsubstituted pyrrolidinofullerenes. The electrochemical reduction of the C60 derivatives we synthesized was found to proceed less easily than that of C60 but more easily than that of unsubstituted pyrrolidinofullerenes.