| abstract |
Bicyclic thiadiaza compounds, especially 1,3-diazacyclopent-2- eno[2,1-b]-(1-thia-3-azacycloalkanes) of the general formula <IMAGE> whose 1,3-diazacyclopent-2-ene ring can have another double bond, Alk is lower alkylene which separates the thia from the aza atom by 2-4 carbon atoms, Ar1 and Ar2 are, independently of one another, optionally substituted phenyl, pyridyl or thienyl, and n is 0, 1 or 2, with the proviso that at least one of the radicals Ar1 and Ar2 is different from phenyl when Alk is ethylene and the 1,3-diazacyclopent- 2-ene ring is an imidazole ring, and the salts thereof, and intermediates of the formula Va or Vb <IMAGE> have valuable pharmacological properties. |