Pyrrolidine inhibitors of human cytosolic phospholipase A2. Part 2: synthesis of potent and crystallized 4-triphenylmethylthio derivative 'pyrrophenone'.

@article{Seno2001PyrrolidineIO,
  title={Pyrrolidine inhibitors of human cytosolic phospholipase A2. Part 2: synthesis of potent and crystallized 4-triphenylmethylthio derivative 'pyrrophenone'.},
  author={Kaoru Seno and Toshikatsu Okuno and Kosuke Nishi and Yasuoki Murakami and Koichiro Yamada and Shozo Nakamoto and Takashi Ono},
  journal={Bioorganic & medicinal chemistry letters},
  year={2001},
  volume={11 4},
  pages={587-90}
}
We synthesized a potent and crystallized human cytosolic phospholipase A2alpha inhibitor, pyrrophenone (6) which inhibits the isolated enzyme with an IC50 value of 4.2 nM. Pyrrophenone shows potent inhibition of arachidonic acid release, prostaglandin E2, thromboxane B2, and leukotriene B4 formation in human whole blood. The magnitudes of prostaglandin E2 and thromboxane B2 inhibition are the same as those of indomethacin. 

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