Efficient Cage-Opening Cascade Process for the Preparation of Water-Encapsulated [60]Fullerene Derivatives
摘要:
Cage-opened fullerenes with 18-membered-ring orifices have been prepared starting from fullerene-mixed peroxides. The key transformation involves a cascade sequence including a deketalization, a S(N)2' epoxide opening reaction, and a formal 3,3-sigma rearrangement. The 18-membered-ring orifice is big enough for water encapsulation under mild conditions. Single crystal X-ray structures were obtained for both the empty and water-encapsulated fullerene derivatives.
Regioselective Diels-Alder Reactions Directed by Carbonyl Groups on the Rim of Open-Cage Fullerene Derivatives
作者:Liang Xu、Qianyan Zhang、Gang Zhang、Sisi Liang、Yuming Yu、Liangbing Gan
DOI:10.1002/ejoc.201301309
日期:2013.11
A C60 fullereneopen-cage derivative with an 18-membered orifice reacts with electron-rich dienes on the rim of the orifice selectively. Both the mono and the bis adduct have been obtained in good yields by controlling the ratio of the reactants and the reaction time. Single-crystal structures show a head-to-tail and back-to-back dimer for the mono adduct of 1,4-diphenylbutadine and a head-to-tail