(indol-3-ylcarbonyl)-1H-3H-pyrrolo[1,2-c]thiazoles represent a new cla
ss of platelet activating factor antagonists. This series was discover
ed by combining the indole portion of a previous thiazolidine series w
ith the known 3-pyridinyl-pyrrolothiazole pharmacophore. Optimization
of the indole substituents resulted in the identification of 8i as one
of the most potent PAF antagonists yet described.