Synthesis of Stable Derivatives of C62: The First Nonclassical Fullerene Incorporating a Four-Membered Ring

A rational synthetic approach to the first four-membered ring-containing derivatives of C62 is reported. They were synthesized by an inverse electron demand Diels−Alder reaction of 3,6-diaryl-1,2,4,5-tetrazines with C60 in o-dichlorobenzene, followed by visible light irradiation at reflux. The structure of these nonclassical fullerenes derivatives was determined by X-ray single-crystal diffraction.

本研究报道了一种针对C62首次含四元环衍生物的理性合成方法。这些衍生物通过在邻二氯苯中3,6-二芳基-1,2,4,5-四嗪与C60进行的逆电子需求Diels-Alder反应合成，反应后经回流状态下的可见光照射，最终通过X射线单晶衍射确定了这些非经典富勒烯衍生物的结构。