Fungicidal triazolopyrimid-7-ylideneamines

Compounds of formula I:

• in which
• R1 is C1-C10-alkyl, C1-C6-alkoxy-C1-C6alkyl, C3-C8 -cycloalkyl-C 1-C6-alkyl, C2-C10-alkenyl, C2-C10-alkynyl, C4-C10-alkadie C1-C10-fluoroalkyl, trihydrocarbylsilyl, formyl, C1-C10-alkanoyl or C1-C10-alkoxycarbonyl group being attached either to the nitrogen in the 3- or 4-position;
• R2 is hydrogen, C1-C10-alkyl, C2-C10-alkenyl, C2-C10-alkynyl, C4-C10-alkadienyl, C1-C10-haloalkyl, C3-C6-cycloalkyl, C8-C14-bicycloalkyl, phenyl, naphthyl, 5- or 6-membered heteroaryl or heterocyclic groups containing one to four nitrogen atoms or one to three nitrogen atoms and one sulfur or oxygen atom as ring members;
• R3 is phenyl, C3-C6-cycloalkyl or 5- or 6-membered heteroaryl containing besides carbon atoms one to four nitrogen atoms or one to three nitrogen atoms and one sulfur or oxygen atom as ring members;
• R4 is halogen, amino, C1-C10-alkoxy, C1-C10-haloalkoxy, C1-C10-alkylamino or di-C1-C10-alkylamino;
• wherein the bent line indicates that the double bond may be located between the 3- and 9-position or the 4-and 9- position;
• and the zigzag line indicates that the groups connected may have the (E)- or (Z)-configuration;
• R1 to R4 groups independently from one another may be unsubstituted or substituted by one to three groups Ra;
• Ra halogen, nitro, cyano, hydroxy, C1-C6-alkyl, C3-C6-cycloalkyl, C3-C6-cycloalkenyl, C1-C6-haloalkyl, C3-C6-halocycloalkyl, C1-C6-alkoxy, C1-C6-haloalkoxy, tri-C1-C4-alkylsilyl, phenyl, halo- or dihalophenyl or pyridyl.