A. Kraus et al., COVALENT ATTACHMENT OF VARIOUS SUBSTITUENTS IN CLOSEST PROXIMITY TO THE C-60-CORE - A BROAD SYNTHETIC APPROACH TO STABLE FULLERENE DERIVATIVES, Tetrahedron, 51(36), 1995, pp. 9927-9940
alpha-Substituted o-quinodimethanes facilitate the covalent attachment
of many attractive molecules in closest proximity to the C-60-core. T
hermal isomerization of various (+/-)-hydroxybenzocyclobutene esters 4
, 8, 10 and 13 in the presence of C-60 provided the corresponding full
erene adducts 5(n), 7(n), 9(n), 11(n) and 12(n) in high yields. Using
a dumbbell shaped bis-o-quinodimethane precursor 19, accessible from (
+/-)-7-hydroxybenzocyclobutene and dodecanedicarboxylic acid dichlorid
e, a soluble C-60-containing polymer 20 was formed.