Na+ ion templated threading of oligo(ethylene glycol) chains through BPX26C6 allows synthesis of [2]rotaxanes under solvent-free conditions.
Threading of di-, tri-, and tetra(ethylene glycol) through the macrocycle BPX26C6 in the presence of templating Na(+) ions was proven by the synthesis of the corresponding [2]rotaxanes under solvent-free conditions. Among them, a [2]rotaxane featuring both tetra(ethylene glycol) and carbamate stations behaves as a molecular switch that can be controlled reversibly through the application of the KTFPB/[2.2.2]cryptand reagent pair.
Department of Chemistry, National Taiwan University , No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617, R.O.C.
Ke-Dian
KD
Wu
You-Han
YH
Lin
Chien-Chen
CC
Lai
Sheng-Hsien
SH
Chiu
D043844:Crown Ethers / Q000737:chemistry*; D019855:Ethylene Glycol / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D043862:Rotaxanes / Q000138:chemical synthesis* / Q000737:chemistry
D043844:Crown Ethers; D043862:Rotaxanes; C529529:bis-4-xylyl(26)crown-6; D019855:Ethylene Glycol