Thermal [2+2] Intramolecular Cycloadditions of Fuller‐1,6‐enynes

Abstract

More fused rings for fullerenes: Fuller-1,6-enynes are a peculiar class of 1,6-enynes that involve a highly strained double-bond component as well as a curved molecular surface. They undergo an unprecedented thermal [2+2] cycloaddition to afford products with three neighboring fused rings on one six-membered ring of the C60 core as shown in the scheme.