Amido-pyridyl ether compounds and compositions and their use against parasites

A compound of Formula I

• wherein,
• Ra is selected from the group consisting of hydrogen, alkyl, alkoxyalkyl, alkylcarbonyl, haloalkylcarbonyl, alkoxycarbonyl, haloalkoxycarbonyl, alkylthiocarbonyl, haloalkyl, alkylthio, haloalkylthio, alkoxy, haloalkoxyalkyl, alkoxycarbonyl and haloalkoxycarbonyl;
• R1 is hydrogen or alkyl;
• R2 and R3 are each independently selected from the group consisting of hydrogen, hydroxy, amino, alkyl, haloalkyl, alkoxyalkyl, alkenyl, alkynyl, alkylthio, alkylamino, dialkylamino, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl, and cyano,
• or R2 and R3 taken together with the carbon to which both are bound form a substituted or unsubstituted 3- to 7-member cyclic, heterocyclic or heteroaromatic ring, wherein the substituents may each be independent of one another cyano, nitro, halogen, alkyl, haloalkyl, alkylthio, haloalkylthio, alkoxy, haloalkoxy, amino, alkylamino, and dialkylamino;
• a is an integer from zero to four,
• b is an integer from zero to four,
• d is an integer from zero to four,
• R4, R5, R6, R7, R8 and R9 are each independently hydrogen, halogen, alkyl, alkenyl, hydroxyalkyl, alkylthioalkyl, haloalkyl, alkyloxyalkyl, alkylsulfinylalkyl, alkylsulfonylalkyl, alkylsulfonyloxyalkyl, nitro, alkylthio, haloalkylthio, alkoxy, haloalkoxy, amino, alkylamino, and diamino;
• R10 and R11 are each independently selected from the group consisting of hydrogen, hydroxy, amino, cyano, nitro, halogen, thiol, alkylamino, dialkylamino, alkyl, alkenyl, alkynyl, cycloalkyl, hydroxyalkyl, haloalkyl, alkylthio, haloalkylthio, arylthio, alkoxy, phenoxy, alkoxyalkoxy, cycloalkyloxy, haloalkoxy, formyl, alkylcarbonyl, alkoxycarbonyl, sulfonyl, sulfinyl, and unsubstituted or substituted phenyl, unsubstituted or substituted benzyl, unsubstituted or substituted arylthio, unsubstituted or substituted aryloxy, or unsubstituted or substituted heteroaryl, wherein the substituents, independent of one another, may be one or more of cyano, nitro, halogen, alkyl, haloalkyl, alkylthio, haloalkylthio, alkoxy, haloalkoxy, amino, alkylamino, dialkylamino, alkylaminoalkoxy, dialkylaminoalkoxy, and alkylaminoalkyl,
• provided that,
• at least one of b and d is other than zero, and
• at least one of R10 and R11 is other than hydrogen.