Synthesis of [n]rotaxanes by template-directed clipping: the role of the dialkylammonium recognition sites.
Linear and rectangular [n]rotaxanes were synthesized by template-directed clipping of heterocrown ether components onto the dumbbell-shaped molecules containing different dialkylammonium recognition sites. The effect of the structure of the dialkylammonium sites on the clipping efficiency was investigated, and selective clipping led to formation of a rectangular [4]rotaxane.
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543.
Jun
J
Yin
Suvankar
S
Dasgupta
Jishan
J
Wu