FUNGICIDES CONTAINING NEW ETHAN-DERIVATIVES AND PROCESS FOR PRODUCTION OF THE ACTIVE SUBSTANCE

Novel compounds of the general formula (I)or an N-oxide, salt or metal salt complex thereof, wherein 'one of Ar' and Ar2 represents an optionally substituted 6 membered heteroaromatic ring containing 1 or 2 nitrogen atoms and the other of Ar' and Ar2 represents an optionally substituted 5 or 6 membered heterocyclic ring having 1 or 2 heteroatoms or an optionally substituted phenyl group; R' represents a hydrogen atom or an optionally substituted alkyl group; R2 represents a cyano group, a -COOH group or an ester or thioester thereof, or a groupwherein each of R4 and R5 independently represents a hydrogen atom or an optionally substituted alkyl or phenyl group or R4 and R5 together with the interjacent nitrogen atom represent a heterocyclic ring and Y represents a halogen atom; R3 represents a cyano group, a COOH group or an ester or thioester thereof, a hydroxy or thio group, or a group.