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2005
Dioxole derivatives
R 0170
Efficient Acetalization of Epoxy Rings on a Fullerene Cage. — [60]Fullerene epe.g. (I), react with benzaldehyde derivatives such as (II) in the presence of a
20- 115 oxides,
pyridinium hexafluoroantimonate to give the corresponding 1,3-dioxolane derivatives,
cf. (III), in excellent yields. The activation energy for the reaction of (I) with benzaldehyde (II) is determined to be 112.7 kJ/mol. This result shows that fullerene epoxides
undergo a stepwise SN1-like acetalization reaction. — (SHIGEMITSU, Y.; KANEKO,
M.; TAJIMA*, Y.; TAKEUCHI, K.; Chem. Lett. 33 (2004) 12, 1604-1605;
Nanomater. Process. Lab., RIKEN, Saitama 351, Japan; Eng.) — H. Haber
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