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A linear multiporphyrinic

Blanco1, Chambron, Heitz

  • 1Laboratoire de Chimie Organo-Minerale, UMR 7513 du C.N.R.S., Universite Louis Pasteur, Institut Le Bel, 4, rue Blaise Pascal, 67000 Strasbourg, France.

Organic Letters
|September 29, 2000
PubMed
Summary

Researchers synthesized a linear multiporphyrinic [2]-rotaxane using a metal-templating method. This novel molecular architecture was achieved through a one-pot double amide bond formation, yielding 34%.

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Area of Science:

  • Supramolecular Chemistry
  • Organic Synthesis
  • Coordination Chemistry

Background:

  • Rotaxanes are mechanically interlocked molecules with potential applications in molecular machines and materials science.
  • The synthesis of complex rotaxane architectures, particularly those incorporating multiple functional units like porphyrins, remains a synthetic challenge.
  • Transition metal-templating offers a powerful strategy for controlling the self-assembly and threading of macrocycles onto molecular axles.

Purpose of the Study:

  • To synthesize a novel linear multiporphyrinic [2]-rotaxane.
  • To utilize a transition metal-templating approach for the controlled assembly of the rotaxane.
  • To efficiently form the rotaxane structure via a one-pot double amide bond formation.

Main Methods:

  • Synthesis of a gold(III)-incorporating macrocycle.
  • Preparation of a rodlike, phenanthroline-derived chelate with carboxylate end groups.
  • Threading of the macrocycle onto the chelate using a transition metal-templating method.
  • Stoppering of the resulting prerotaxane with a zinc tetraarylporphyrin derivative using EDC-HOBt activation.

Main Results:

  • Successful synthesis of a linear multiporphyrinic [2]-rotaxane.
  • Demonstration of the transition metal-templating method for constructing the rotaxane.
  • Achieved a 34% yield for the one-pot, double amide bond formation process.

Conclusions:

  • The study presents a viable synthetic route to linear multiporphyrinic [2]-rotaxanes.
  • The transition metal-templating strategy is effective for the directed assembly of complex rotaxane architectures.
  • The one-pot double amide bond formation offers an efficient method for rotaxane completion.

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