Substituted oxadiazoles for combating phytopathogenic fungi

A compound of the formula I

• wherein:
• A is phenyl, wherein the group —C(R3R4)—NR1R2 is attached to the phenyl ring in a position para to the trifluoromethyloxadiazole group;
• and wherein the phenyl group is unsubstituted or substituted by 1, 2, 3 or 4 identical or different groups RA;
• wherein
• RA is halogen, cyano, C1-C6-alkyl, C1-C6-haloalkyl, C1-C6-alkoxy or C1-C6-haloalkoxy;
• R1, R2 independently of each other are hydrogen, C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, C3-C8-cycloalkyl, C(═O)—(C1-C6-alkyl), or C(═O)—(C1-C6-alkoxy);
• and wherein the cycloalkyl group is unsubstituted or substituted by 1, 2, 3, 4 or up to the maximum possible number of identical or different groups R1a;
• wherein
• R1a is halogen, cyano, NO2, OH, SH, NH2, C1-C6-alkyl, C1-C6-haloalkyl, C1-C6-alkoxy, C1-C6-haloalkoxy, C1-C6-alkylthio, C1-C6-haloalkylthio, C3-C8-cycloalkyl, NHSO2—C1-C4-alkyl, (C═O)—C1-C4-alkyl, C(═O)—C1-C4-alkoxy or C1-C6-alkylsulfonyl;
• R3 and R4 together with the carbon atom to which they are bound form a 3- to 7-membered carbocycle or a saturated 3- to 6-membered heterocycle, wherein the heterocycle includes beside carbon atoms 1, 2 or 3 heteroatoms independently selected from the group consisting of N—RN, S, S(═O), S(═O)2 and O as ring member atoms;
• wherein RN is hydrogen, C1-C6-alkyl, SO2CH3, SO2C6H4CH3 or S02-aryl;
• and wherein one or two CH2 groups of the cycle may be replaced by one or two groups independently selected from the group of C(═O) and C(═S);
• and wherein the carbocycle, heterocycle and aryl is unsubstituted or carries 1, 2, 3, 4 or up to the maximum possible number of identical or different groups R3a;
• wherein
• R3a is halogen, cyano, NO2, OH, SH, NH2, C1-C6-alkyl, C1-C6-haloalkyl, C1-C6-alkoxy, C1-C6-haloalkoxy, C1-C6-alkylthio, C1-C6-haloalkylthio, C3-C8-cycloalkyl, NHSO2—C1-C4-alkyl, —(C═O)—C1-C4-alkyl, C(═O)—C1-C4-alkoxy or C1-C6-alkylsulfonyl;
• or N-oxide or an agriculturally acceptable salt thereof;
• with the exception of N-[1-[4-[5-(trifluoromethyl)-1,2,4-oxadiazole-3-yl]phenyl]cyclopropyl]propanamide.