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Competition-driven selection in covalent dynamic networks and implementation in organic reactional selectivity.

P Kovaříček1, A C Meister1, K Flídrová1

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Dynamic combinatorial libraries enable self-sorting reactions, improving selectivity in complex mixtures. This approach introduces selective dynamic protecting groups (DPGs) for efficient organic synthesis.

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Area of Science:

  • Organic Chemistry
  • Supramolecular Chemistry
  • Chemical Synthesis

Background:

  • Dynamic combinatorial chemistry (DCC) utilizes reversible reactions to create complex molecular libraries.
  • Controlling selectivity in reactions involving multiple components remains a significant challenge in organic synthesis.
  • Conventional protecting groups can add steps and reduce efficiency in multi-step syntheses.

Purpose of the Study:

  • To investigate reactional self-sorting in dynamic combinatorial libraries of aldehydes and oligoamines.
  • To develop and assess selective dynamic protecting groups (DPGs) for organic synthesis.
  • To demonstrate the utility of DPGs in selective sequential derivatization of oligoamines.

Main Methods:

  • Utilizing dynamic combinatorial libraries (DCLs) with aldehydes and oligoamines to observe self-sorting.
  • Assessing the selectivity of various carbonyl compounds in reactions with amines.
  • Exploiting dynamic exchange trapping for the removal of DPGs and selective derivatization.

Main Results:

  • Achieved improved regioselectivity through reactional self-sorting in complex mixtures.
  • Demonstrated the transfer of selectivity between library components via equilibrating reactions.
  • Successfully designed and applied dynamic protecting groups (DPGs) for selective synthesis.
  • Showcased the elimination of intermediate isolation and purification steps.

Conclusions:

  • Reactional self-sorting in DCLs enhances selectivity and enables controlled synthesis.
  • Dynamic protecting groups offer a valuable alternative to conventional methods, simplifying complex molecule synthesis.
  • The DPG concept is generalizable to various reversible reactions, impacting total synthesis strategies.