Abstract
Reversible cleavage of an aromatic disulphide bond of a dumbbell-shaped molecule having two sec-ammonium salt moieties enabled the insertion of the disulphide linkage through a crown ether to give the corresponding [2]- and [3]rotaxanes. The formation of the rotaxanes proceeded much more rapidly than the case of an aliphatic disulphide system.
Acknowledgements
This work was financially supported by a Grant-in-Aid for Scientific Research (No. 18205014) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.