G. Mehta et Mb. Viswanath, NOVEL BICYCLO[2.2.0]HEXANE-FUSED [60]FULLERENE DERIVATIVES VIA CYCLOADDITION WITH A CYCLOBUTADIENE DIESTER, Tetrahedron letters, 36(31), 1995, pp. 5631-5632
Diels-Alder reaction between C-60 1 and 1,2-dicarbomethoxycyclobutadie
ne 2 furnished 1:1 adducts 4 and 5 comprising of a strained [60]fuller
ene fused bicyclo[2.2.0]hexane moiety.