Pyrimidin-4-enamine as fungicide

A compound of formula I

• wherein
• A is a 5- or 6-membered ring which may be saturated or unsaturated, aromatic or non-aromatic and which may contain no hetero atoms or 1-3 hetero atoms O, S and/or N, each in the free form or in salt form;
• with the exception of the imidazol ring;
• R1, R2 and R3 are each independently of the other hydrogen;
• halogen;
• C1-C8alkyl, C2-C8alkenyl or C2-C8alkinyl which are unsubstituted or mono- to tri-substituted by C3-C6cycloalkyl, halogen, C1-C6alkoxy, C1-C6alkylthio or C1-C6haloalkoxy;
• O—C1-C6alkyl, C2-C6alkenyl, O—C2-C6alkynyl, S—C1-C6alkyl, S—C2-C6alkenyl or S—C2-C6alkynyl, which are unsubstituted or mono- to tri-substituted by C3-C6cycloalkyl, halogen, C1-C6alkoxy or C1-C6haloalkoxy;
• cyano;
• nitro;
• or trimethylsilyl;
• provided that R1, R2 and R3 are not hydrogen at the same time;
• R4 is C1-C8alkyl, C2-C8alkenyl or C2-C8alkinyl which are unsubstituted or mono- to tri-substituted by C3-C6cycloalkyl, halogen, cyano, nitro, CO—C1-C4alkyl, COO—C1-C4alkyl, CO-aryl, COO-aryl, C1-C6alkoxy, C1-C6alkylthio or C1-C6haloalkoxy;
• C3-C6cycloalkyl which is unsubstituted or mono- to tri-substituted by C1-C8alkyl, C1-C6haloalkyl, halogen, cyano, C1-C6alkoxy or C1-C6haloalkoxy;
• phenyl or benzyl, in which the phenyl group is unsubstituted or mono- to pentasubstituted by halogen, cyano, nitro, C1-C8alkyl, C2-C8alkenyl, C2-C8alkinyl, C1-C6alkoxy, C1-C6haloalkoxy or C1-C8haloalkyl;
• NHR7;
• SR7;
• or CR7;
• R5 is C1-C8alkyl, C2-C8alkenyl or C2-C8alkinyl which are unsubstituted or mono- to tri-substituted by C3-C6cycloalkyl, halogen, cyano, nitro, CO—C1-C4alkyl, COO—C1-C4alkyl, CO-aryl, COO-aryl, C1-C6alkoxy, C1-C6alkylthio or C1-C6haloalkoxy;
• C3-C6cycloalkyl which is unsubstituted or mono- to tri-substituted by C1-C6alkyl, halogen, cyano, C1-C6alkoxy, C1-C6haloalkyl or C1-C6haloalkoxy;
• R6 is hydrogen;
• C1-C8alkyl, C2-C8alkenyl or C2-C8alkinyl which are unsubstituted or mono- to tri substituted by C3-C6cycloalkyl, halogen, cyano, nitro, CO—C1-C4alkyl, COO—C1-C4alkyl, CO-aryl, COO-aryl, C1-C6alkoxy, C1-C6alkylthio or C1-C6haloalkoxy;
• C3-C6cycloalkyl which is unsubstituted or mono- to tri-substituted by C1-C6alkyl, halogen, cyano, C1-C6alkoxy, C1-C6haloalkyl or C1-C6haloalkoxy;
• O—C1-C6alkyl, O—C2-C6alkenyl, O—C2-C6alkynyl, S—C1-C6alkyl, S—C2-C6alkenyl or S—C2-C6alkynyl, which are unsubstituted or mono- to tri-substituted by C3-C6cycloalkyl, halogen, cyano, C1-C6alkoxy or C1-C6haloalkoxy;
• aryl or heteroaryl which are unsubstituted or mono- to tri-substituted by halogen, cyano, nitro, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy or C1-C6haloalkoxy;
• CO-heteroaryl;
• CO—C1-C6alkyl;
• CO—C1-C6alkyl-O—C1-C6alkyl;
• CO—C1-C6haloalkyl;
• SO2—C1-C6alkyl;
• SO2-aryl;
• CO-phenyl or CO—C1-C6alkyl-O-phenyl in which phenyl is unsubstituted or mono- to tri-substituted by halogen, cyano, nitro, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy or C1-C6haloalkoxy;
• COOR8 wherein R8 is C1-C8alkyl, C2-C8alkenyl, C2-C8alkynyl, C3-C4cycloalkyl or phenyl which is unsubstituted or mono- to tri-substituted by halogen, cyano, nitro, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy or C1-C6haloalkoxy;
• cyano;
• nitro;
• or halogen;
• and
• R7 is C1-C8alkyl, C2-C8alkenyl or C2-C8alkinyl which are unsubstituted or mono- to tri-substituted by C3-C6cycloalkyl, halogen, cyano, nitro, CO—C1-C4alkyl, COO—C1-C4alkyl, CO-aryl, COO-aryl, C1-C6alkoxy, C1-C6alkylthio or C1-C6haloalkoxy;
• C3-C6cycloalkyl which is unsubstituted or mono- to tri-substituted by C1-C6alkyl, C1-C6haloalkyl, halogen, cyano, C1-C6alkoxy or C1-C6haloalkoxy;
• phenyl or benzyl, in which the phenyl group is unsubstituted or mono- to pentasubstituted by halogen, cyano, nitro, C1-C8alkyl, C2-C8alkenyl, C2-C8alkinyl, C1-C6alkoxy, C1-C6haloalkoxy or C1-C8haloalkyl.