DMAP-catalyzed [3 + 2] and [4 + 2] cycloaddition reactions between [60]fullerene and unmodified Morita-Baylis-Hillman adducts in the presence of Ac_2O

摘要

One-step DMAP-catalyzed [3 + 2] and [4 + 2] cycloaddition reactions between C_(60) and unmodified Morita-Baylis-Hillman adducts in the presence of Ac_2O have been developed for the easy preparation of cyclopentene- and cyclohexene-fused [60]fullerene derivatives. When the MBH adducts bear an alkyl group, two different reaction pathways could be controlled selectively depending on the conditions.