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5-membered cyclic hydroxamic acids as HDAC inhibitors.

Ilze Mutule1, Diana Borovika, Elina Rozenberga

  • 1Department of Organic Chemistry, Latvian Institute of Organic Synthesis , Riga , Latvia.

Journal of Enzyme Inhibition and Medicinal Chemistry
|June 19, 2014
PubMed
Summary

New cyclic hydroxamic acids (5-CHA) function as histone deacetylase inhibitors (HDACi) with potential for cancer therapy. Compound 10c demonstrated low micromolar activity, warranting further investigation of this compound class.

Keywords:
Cyclic hydroxamic acidsN-hydroxypyrrolidoneshistone deacylasesinhibitors

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Area of Science:

  • Medicinal Chemistry
  • Organic Synthesis
  • Biochemistry

Background:

  • Histone deacetylase inhibitors (HDACi) are an important class of anticancer agents.
  • Developing novel HDACi with improved potency and selectivity is crucial for cancer therapy.
  • Cyclic hydroxamic acids (CHA) represent a promising scaffold for HDAC inhibitor design.

Purpose of the Study:

  • To synthesize novel 5-membered cyclic hydroxamic acids (5-CHA) as potential histone deacetylase inhibitors.
  • To explore a new reaction sequence for synthesizing 5-membered alkylidene-cyclic-hydroxamic acids.
  • To evaluate the inhibitory activity of the synthesized compounds against HDACs.

Main Methods:

  • Synthesis of novel 5-membered cyclic hydroxamic acids (5-CHA) using a proposed reaction sequence starting from butyrolactone.
  • Characterization of synthesized compounds using standard organic chemistry techniques.
  • Evaluation of HDAC inhibitory activity using HeLa cell extracts and determination of IC50 values.

Main Results:

  • Successful synthesis of a new class of 5-membered cyclic hydroxamic acids (5-CHA) incorporating a medium-sized CHA as a novel Zn-binding group.
  • A new synthetic route was established for 5-membered alkylidene-cyclic-hydroxamic acids.
  • Compound 10c exhibited low micromolar (µM) inhibitory activity against HDACs in HeLa cell extracts.

Conclusions:

  • The synthesized 5-membered cyclic hydroxamic acids (5-CHA) show potential as histone deacetylase inhibitors (HDACi).
  • The novel Zn-binding group and synthetic methodology offer a promising avenue for developing more potent HDAC inhibitors.
  • Further investigation and optimization of cyclic hydroxamic acids are warranted to discover superior anticancer agents.