Diels-Alder [4+2]cycloaddition reactions involving C-60 and C-70 fullerenes

Abstract

For first time dienes conjugated 8, 9 and 10 were synthesized with a s-cis conformation, and Diels-Alder cycloaddition reactions between dienes synthesized and C-60 and C-70 were carried out, and the results obtained by NMR H-1 and C-13 and elemental analysis demonstrated that the mono and biadduct compounds were formated, diene 9 was more reactive than dienes 8 and 10. Fullerenes C-60 and C-70 did not presented any difference in their reactivity like dienophiles.