Novel potent and selective Ca2+ release-activated Ca2+ (CRAC) channel inhibitors. Part 3: Synthesis and CRAC channel inhibitory activity of 4′-[(trifluoromethyl)pyrazol-1-yl]carboxanilides

Bioorganic & Medicinal Chemistry
2008.0

Abstract

From a series of 4'-[(trifluoromethyl)pyrazol-1-yl]carboxanilides derived from 4-methyl-4'-[3,5-bis(trifluoromethyl)-1H-pyrazol-1-yl]-1,2,3-thiadiazole-5-carboxanilide, one inhibited thapsigargin-induced Ca2+ influx in Jurkat T cells (IC(50)=77 nM) and exhibited high selectivity for the CRAC channel over the VOC channel (index: >130). Another acted as an inhibitor for both T lymphocyte activation-induced diseases and ovalbumin-induced airway eosinophilia in rats (ED(50)=1.3 mg/kg) p.o.

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