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Updated: Mar 27, 2026

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Selective Multiamination of C70 Leading to Curved π Systems with 60, 58, 56, and 50 π Electrons
Yanbang Li1, Dan Xu1, Liangbing Gan2,3
1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Abstract:
Secondary aliphatic amines add to a pole pentagon of [70]fullerene in the presence of N-fluorobenzenesulfonimide to form cyclopentadienyl-type adducts, C70(NSO2 Ph)(NR(1)R(2))4 (1), which can be converted into analogous C70 derivatives such as C70 (NHSO2 Ph)(NHTol)5 (2). Further addition reactions of either 1 or 2 take place selectively at the opposite pole pentagon of the C70 cage, thus forming curved π systems with a reduced number of π electrons, and the products include a dodecakis-adduct with a Vögtle belt motif.
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