A highly efficient approach to [4]pseudocatenanes by threefold metathesis reactions of a triptycene-based tris[2]pseudorotaxane.
A triptycene-based homotritopic host was designed and synthesized. Assembly of the host with a bisbenzylammonium salt containing terminal double bonds resulted in a tris[2]pseudorotaxane, which further performed the threefold metathesis reaction and then hydrogenation to give a [4]pseudocatenane in high yield. The [4]pseudocatenane exhibited a novel topological structure with high symmetry, which was confirmed by the spectral data and X-ray analysis.
Zhu
Xiao-Zhang
XZ
Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
Chen
Chuan-Feng
CF
D043863:Catenanes / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008958:Models, Molecular; D015394:Molecular Structure; D043862:Rotaxanes / Q000138:chemical synthesis / Q000737:chemistry*
D043863:Catenanes; D043862:Rotaxanes