Journal of Medicinal Chemistry p. 7128 - 7137 (2015)
Update date:2022-07-31
Topics:
Asaki, Tetsuo
Kuwano, Keiichi
Morrison, Keith
Gatfield, John
Hamamoto, Taisuke
Clozel, Martine
Prostacyclin controls cardiovascular function via activation of the prostacyclin receptor. Decreased prostacyclin production occurs in several cardiovascular diseases. However, the clinical use of prostacyclin and its analogues is complicated by their chemical and metabolic instability. A medicinal chemistry program searched for novel nonprostanoid prostacyclin receptor agonists not subject to these limitations. A compound with a diphenylpyrazine structural core was synthesized. Metabolic stability and agonist potency were optimized through modification of the linear side chain. Compound 12b (MRE-269, ACT-333679) was identified as a potent and highly selective prostacyclin receptor agonist. Replacement of the terminal carboxyl group with an N-acylsulfonamide group yielded parent compound 26a (selexipag, NS-304, ACT-293987), which is orally active and provides sustained plasma exposure of 12b. Compound 26a was developed for the treatment of pulmonary arterial hypertension and shown to reduce the risk of the composite morbidity/mortality end point in a phase 3 event-driven clinical trial.
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