Synthesis and Biological Evaluation of New Phthalazinone Derivatives as Anti-Inflammatory and Anti-Proliferative Agents

Arch Pharm (Weinheim). 2016 Feb;349(2):150-9. doi: 10.1002/ardp.201500336. Epub 2016 Jan 3.

Abstract

The chemistry of phthalazine derivatives has been of increasing interest since many of these compounds have found many chemotherapeutic applications. So this study aims to synthesize a library of phthalazine derivatives and to investigate their anti-inflammatory and anti-proliferative activities. Sixteen new phthalazinone derivatives (2a-p) were synthesized and tested for their in vitro antiproliferative and in vivo anti-inflammatory activities. All the synthesized compounds were identified and characterized by IR, (1) H NMR, (13) C NMR spectroscopy, and MS. Two compounds, 2b and 2i, showed significant anti-inflammatory activity comparable with that of the standard drug etoricoxib in the carrageenan-induced rat paw edema model at 3 and 5 h, respectively. Three compounds (2h, 2j, and 2g) showed moderate sensitivity toward the renal cancer cell line UO-31.

Keywords: Anti-inflammatory activity; Anti-proliferative activity; COX-2; LOX-5 inhibitors; Phthalazone.

MeSH terms

  • Animals
  • Anti-Inflammatory Agents, Non-Steroidal / chemical synthesis
  • Anti-Inflammatory Agents, Non-Steroidal / chemistry*
  • Anti-Inflammatory Agents, Non-Steroidal / pharmacology
  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / chemistry*
  • Antineoplastic Agents / pharmacology
  • Carrageenan
  • Cell Line, Tumor
  • Cyclooxygenase 2 Inhibitors / chemical synthesis
  • Cyclooxygenase 2 Inhibitors / chemistry
  • Cyclooxygenase 2 Inhibitors / pharmacology
  • Drug Screening Assays, Antitumor
  • Edema / chemically induced
  • Edema / drug therapy
  • Female
  • Humans
  • Male
  • Phthalazines / chemical synthesis
  • Phthalazines / chemistry*
  • Phthalazines / pharmacology
  • Rats, Wistar
  • Structure-Activity Relationship
  • Sulfones / chemical synthesis
  • Sulfones / chemistry*
  • Sulfones / pharmacology

Substances

  • 2-(4-methanesulfonylphenyl)-4-(5,6,7,8-tetrahydronaphthalen-2-yl)phthalazin-1-one
  • 4-(4-biphenyl)-2-(4-(methylsulfonyl)phenyl)phthalazin-1(2H)-one
  • Anti-Inflammatory Agents, Non-Steroidal
  • Antineoplastic Agents
  • Cyclooxygenase 2 Inhibitors
  • Phthalazines
  • Sulfones
  • Carrageenan