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Efficient Solution-Phase Synthesis of Sequence-Defined Oligourethanes with Precise Chirality Control.

Anuj Sharma1, Tapendu Samanta1, Joanna Cybińska1,2

  • 1Łukasiewicz Research Network - PORT Polish Center for Technology Development, Wrocław, Poland.

Macromolecular Rapid Communications
|June 22, 2025
PubMed
Summary
This summary is machine-generated.

Chemists developed a new, efficient method for creating sequence-defined oligourethanes (SDOUs) with precise stereochemical control. This breakthrough enables scalable synthesis of advanced polymers for material science applications.

Keywords:
chiral oligourethanesone‐pot synthesissequence foldingsequence‐defined oligomersstructure‐property relationship

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Synthesis

Background:

  • Nature utilizes precisely defined macromolecules for efficient biochemical processes.
  • Sequence-defined macromolecules offer tailored functions but face synthetic challenges.
  • Current synthetic methods are often low-yielding and time-consuming.

Purpose of the Study:

  • To develop an efficient and scalable synthesis for stereochemically controlled sequence-defined oligourethanes (SDOUs).
  • To explore the influence of stereochemistry on the properties of SDOUs.
  • To demonstrate the functionalization and photophysical properties of the synthesized SDOUs.

Main Methods:

  • Fmoc-assisted, stereo-controlled synthesis in solution phase using a two-step, one-pot strategy.
  • Utilized six modified chiral monomers for precise sequence and stereochemical control.
  • Characterization included thermal analysis, tandem mass spectrometry, circular dichroism, and photophysical studies.

Main Results:

  • Achieved an average yield of >85% per step with a step-economical synthesis.
  • Demonstrated that stereochemistry significantly impacts thermal transitions (glass transition, crystallization, melting).
  • Confirmed precise sequence control and explored functionalization, solvatochromism, and aggregation behavior.

Conclusions:

  • Established scalable and efficient synthetic routes for stereochemically controlled SDOUs.
  • Highlighted the significant role of stereochemistry in dictating polymer properties.
  • Opened avenues for designing advanced sequence-defined polymers with diverse functionalities.