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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
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α-Sila-Dipeptides: Synthesis and Characterization.

Boris Minkovich1, Ilya Ruderfer1, Alexander Kaushansky1

  • 1Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel.

Angewandte Chemie (International Ed. in English)
|August 18, 2018
PubMed
Summary

Researchers synthesized novel alpha-sila-dipeptides, representing the first "silicon for carbon switch" in amino acid chemistry. These silicon-containing peptides offer new possibilities in peptide and medicinal chemistry.

Keywords:
Si for C switchpeptidomimeticssila-piperazineα-sila-dipeptides

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Area of Science:

  • Organometallic Chemistry
  • Peptide Chemistry
  • Synthetic Chemistry

Background:

  • Traditional amino acids and peptides are fundamental building blocks in biochemistry and drug development.
  • Incorporating silicon into peptide backbones presents a unique challenge and opportunity for novel molecular design.

Purpose of the Study:

  • To synthesize and characterize the first alpha-sila-dipeptides, featuring silicon at the central alpha-position.
  • To investigate the structural and stabilizing properties of silicon incorporation in peptide structures.

Main Methods:

  • Synthesis of novel alpha-sila-dipeptide analogs (compounds 7 and cyclo-sila-dipeptide 8).
  • Characterization using various analytical techniques, including X-ray crystallography.
  • Introduction of bulky tert-butyldimethylsilyl (t-BuMe2Si) substituents for kinetic stabilization.

Main Results:

  • Successful synthesis and full characterization of two novel alpha-sila-dipeptides.
  • Demonstration of a "Si for C switch" where silicon replaces carbon at the alpha-position, bonded to both amino and carbonyl groups.
  • X-ray crystallography confirmed the molecular structures and the silicon-carbon bond interactions.

Conclusions:

  • The synthesized alpha-sila-dipeptides are the first examples of a silicon-carbon substitution at the central alpha-position of amino acids/peptides.
  • Bulky silyl substituents enhance the kinetic stability of these novel silicon-containing peptide analogs.
  • This work opens avenues for exploring silicon's role in peptide structure and function.