chain 18 and semi[2]rotaxane 19, and the subsequent one-pot CuAAC click reaction
could afford the target product 20 efficiently. This improved system gave further insight
into self-sorting processes and expanded the toolbox for the construction of more
complicated rotaxanes with daisy chain structure.
As a continuation of research, in a very recent work, our group further employed a
facile and efficient one-pot “click” stoppering strategy to construct a novel hetero[6]
rotaxane bearing three different kinds of crown ether macrocycle [39b]. In this selfsorting system, six components include three kinds of crown ether, namely,
BPP34C10, DB24C8, and B21C7, and their corresponding cation guest molecules,
namely, a 4,4
0 -bipyridine dication (BPY2
+ ) and DBA and benzylalkylammonium
Fig. 4 Synthetic methodology for the construction of a series of hetero[n]rotaxanes: (a) hetero[3]
rotaxane 10 [38], (b) hetero[7]rotaxane 15 [12a], (c) hetero[4]rotaxane 20 [39] by the self-sorting
synthetic strategy
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could afford the target product 20 efficiently. This improved system gave further insight
into self-sorting processes and expanded the toolbox for the construction of more
complicated rotaxanes with daisy chain structure.
As a continuation of research, in a very recent work, our group further employed a
facile and efficient one-pot “click” stoppering strategy to construct a novel hetero[6]
rotaxane bearing three different kinds of crown ether macrocycle [39b]. In this selfsorting system, six components include three kinds of crown ether, namely,
BPP34C10, DB24C8, and B21C7, and their corresponding cation guest molecules,
namely, a 4,4
0 -bipyridine dication (BPY2
+ ) and DBA and benzylalkylammonium
Fig. 4 Synthetic methodology for the construction of a series of hetero[n]rotaxanes: (a) hetero[3]
rotaxane 10 [38], (b) hetero[7]rotaxane 15 [12a], (c) hetero[4]rotaxane 20 [39] by the self-sorting
synthetic strategy
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C.-X. Zhao et al.