Microwave-assisted synthesis of 1,3-benzothiazol-2(3 H)-one derivatives and analysis of their antinociceptive activity

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Onkol T., Dundar Y., Yildirim E., Erol K., Sahin M. F.

Arzneimittel-Forschung/Drug Research, vol.62, no.12, pp.571-575, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 62 Issue: 12
  • Publication Date: 2012
  • Doi Number: 10.1055/s-0032-1327613
  • Journal Name: Arzneimittel-Forschung/Drug Research
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.571-575
  • Keywords: 1,3-benzothiazol-2(3H)-one, tail flick test, tail clip test, hot plate test, writhing test, microwave-assisted synthesis
  • Gazi University Affiliated: Yes


A rapid and efficient method was developed for synthesis of 6-acyl-1,3-benzothiazol-2(3H)-one derivatives under microwave irradiation (MWI) conditions. The reaction times were shortened compared to conventional heating. Additionally, we synthesized acetic acid and acetamide derivatives of 1,3-benzothiazol-2(3H)-one, 6-acyl-1,3-benzothiazol-2(3H)-one, 5-chloro-1,3-benzothiazol-2(3H)-one and 6-acyl-5-chloro-1,3-benzothiazol-2(3H)- one with the microwave-assisted method and analyzed their antinociceptive activity with the tail flick, tail clip, hot plate and writhing tests. Among the synthesized compounds, 3-[2-(4-ethylpiperazin-1-yl)-2-oxoethyl]-1,3- benzothiazol-2(3H)-one (6a), 5-chloro-3-{2-oxo-2-[4-(propan-2-yl) piperazin-1-yl]ethyl}-1,3-benzothiazol-2(3H)-one (7e) and 3-[2-(4- butylpiperazin-1-yl)-2-oxoethyl]-5-chloro-1,3-benzothiazol-2(3H)-one (8e) showed significant antinociceptive activity in the tail clip, tail flick, hot plate and writhing tests. Supporting Information available online at http://www.thieme-connect.de/ejournals/toc/amf.