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Related Experiment Videos

Versatile solid-phase synthesis of s-arylisothioureas.

Alan R Katritzky1, Boris V Rogovoy, Vladimir Vvedensky

  • 1Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA. katrizky@chem.ufl.edu

Journal of Combinatorial Chemistry
|July 9, 2002
PubMed
Summary

This study presents a novel resin-bound synthesis for creating nonprotected isothioureas and guanidines. These compounds are formed in high yields and purity, offering a valuable method for organic synthesis.

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Area of Science:

  • Organic Chemistry
  • Synthetic Chemistry
  • Medicinal Chemistry

Background:

  • Resin-bound synthesis offers advantages in purification and reaction efficiency.
  • Isothioureas and guanidines are important scaffolds in medicinal chemistry and organic synthesis.

Purpose of the Study:

  • To develop a robust and efficient method for synthesizing nonprotected isothioureas and guanidines using resin-bound chemistry.
  • To explore the scope and limitations of the developed synthetic route.

Main Methods:

  • Condensation of resin-bound amines with di(benzotriazol-1-yl)methanimine.
  • Reaction of the resulting resins with thiols followed by cleavage.
  • Analogous reactions with secondary amines activated with EtMgBr.
  • Acylation of resin-bound isothioureas with acyl chlorides or carboxylic acids.

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Main Results:

  • Nonprotected isothioureas were synthesized in high yields and purities.
  • Guanidines were obtained in moderate yields.
  • Acyl derivatives of isothioureas were prepared in high yields and purities.

Conclusions:

  • The developed resin-bound strategy provides an efficient route to diverse isothioureas and guanidines.
  • This method is suitable for library synthesis and accessing valuable organic scaffolds.
  • The high yields and purities achieved demonstrate the utility of this approach.