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Related Experiment Videos

Synthesis of functionalized 1,3-thiazine libraries combining solid-phase synthesis and post-cleavage modification

Gernot A Strohmeier1, Willibald Haas, C Oliver Kappe

  • 1Institute of Chemistry, Organic and Bioorganic Chemistry, Karl-Franzens University Graz, Heinrichstrasse 28, 8010 Graz, Austria.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 24, 2004
PubMed
Summary

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This study details a novel solid-phase synthesis for diverse 1,3-thiazine-5-carboxylates using Wang resin. The method includes on-bead purification and post-cleavage modifications, yielding up to twenty compounds.

Area of Science:

  • Organic Chemistry
  • Medicinal Chemistry
  • Polymer Chemistry

Background:

  • Solid-phase synthesis offers advantages for combinatorial chemistry.
  • 1,3-thiazine derivatives are important scaffolds in medicinal chemistry.
  • Efficient synthesis of diverse heterocyclic compounds is crucial for drug discovery.

Purpose of the Study:

  • To develop a robust solid-phase synthesis for a diverse library of 1,3-thiazine-5-carboxylates.
  • To explore novel synthetic routes for beta-keto esters on solid support.
  • To implement on-bead purification strategies to enhance compound purity.

Main Methods:

  • Solid-phase synthesis on Wang resin.
  • Acetoacetylation, Knoevenagel condensation, and acid-promoted cyclization with thioureas.

Related Experiment Videos

  • De-novo synthesis of beta-keto esters and on-bead purification.
  • Trifluoroacetic acid (TFA) cleavage and post-cleavage modifications.

    • Main Results:

    • Successful synthesis of polymer-bound 1,3-thiazines.
    • Demonstrated de-novo synthesis of beta-keto esters for increased diversity.
    • Effective on-bead purification to reduce contamination.
    • Obtained twenty 1,3-thiazine-5-carboxylates in yields up to 61% over 9 or 13 steps.

    Conclusions:

    • The developed solid-phase methodology provides efficient access to diverse 1,3-thiazine-5-carboxylates.
    • On-bead purification and post-cleavage modifications enhance the utility of this synthetic approach.
    • This method is valuable for generating compound libraries for drug discovery and chemical biology research.