Design, synthesis and antimycobacterial activity of benzoxazinone derivatives and open-ring analogues: Preliminary data and computational analysis

Daniele Zampieri, Maria Grazia Mamolo, Julia Filingeri, Sara Fortuna, Alessandro De Logu, Adriana Sanna, Davide Zanon

Research output: Contribution to journalArticlepeer-review

Abstract

This study examines in depth benzoxazine nucleus for antimycobacterial property. We synthesized some benzoxazin-2-one and benzoxazin-3-one derivatives, which were tested for activity against a panel of Mycobacterium tuberculosis (Mtb) strains, including H37Ra, H37Rv and some resistant strains. Several compounds displayed a high antimycobacterial activity and the three isoniazid analogue derivatives 8a-c exhibited a MIC range of 0.125–0.250 μg/mL (0.37–0.75 μM) against strain H37Ra, therefore lower than the isoniazid reference drug. Two benzoxazin-2-one derivatives, 1c and 5j, together with isoniazid-analogue compound 8a, also revealed low MIC values against resistant strains and proved highly selective for mycobacterial cells, compared to mammalian Vero cells. To predict whether molecule 8a is able to interact with the active site of InhA, we docked it into the crystal structure; indeed, during the molecular dynamic simulation the compound never left the protein pocket. The more active compounds were predicted for ADME properties and all proved to be potentially orally active in humans.

Original languageEnglish
Pages (from-to)2468-2474
Number of pages7
JournalBioorganic and Medicinal Chemistry Letters
Volume29
Issue number17
DOIs
Publication statusPublished - Sep 1 2019

Keywords

  • ADME
  • Antimycobacterial activity
  • Benzoxazinone
  • Molecular dynamics
  • Oxoacetamide

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmaceutical Science
  • Drug Discovery
  • Clinical Biochemistry
  • Organic Chemistry

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