New one-pot method for the synthesis of pyrrolidinofullerenes

摘要

The reaction of fullerene C _(60) 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 C _(60) under the developed conditions to give N -unsubstituted pyrrolidinofullerenes. The electrochemical reduction of the C _(60) derivatives we synthesized was found to proceed less easily than that of C _(60) but more easily than that of unsubstituted pyrrolidinofullerenes.