Reaction of C60 with cyclopent-2-enone acetals. A convenient access to chiral C60 derivatives

Abstract

C60 reacts with cyclopent-2-enone ethylene acetal to give C60-fused norbornan-2-one acetal; modification of the starting acetal with a chiral auxiliary leads to a mixture of diastereoisomeric adducts from which a pair of enantiomerically pure C60-fused norbornan-2-ones are readily obtained.