1-phenyl-pyrazole derivatives and their use as parasiticidal agents

Abstract From the Canadian patent

Compounds of formula (I), wherein, R1 is H C1-6 alkyl optionally substituted by one or more halogen atoms halogen, CN,C1-6, alkoxycarbonyl optionally substituted by one or more halogen atoms NO2, CHO, CONH2, CSNH2 or C1-6 alkanoyl optionally substituted by one or more halogen atoms; Ar is a ring "A" where "A" is a phenyl group or "A" is a 5- or 6-membered heteroaryl group, wherein heteroaryl means a fully unsaturated heterocycle containing 1,2 or 3 hetero-, atoms, which heteroatoms are independently selected from 1 N atom 1 or 2 O atoms and, 1 or 2 S atoms, where the valence allows or Ar is a fused bicyclic moiety "AB" where the "A" ring is as defined above and the "B" ring fused thereto in …