Compound of formula: wherein R 1 is selected from the following groups: R 2 is selected from the following groups: R 3 denotes Ar 2, Het 1, Cyc or A; A is a branched or linear alkyl having 2 to 12 C-atoms, wherein one or more, preferably 1 to 7 H-atoms may be replaced by Hal, OR 4, CN, CO 2 R 4, CF 3, cycloalkyl having 3 to 7 ring carbon atoms, Ar 2, or N(R 4) 2 and wherein one or more, preferably 1 to 7 non-adjacent CH 2 -groups may be replaced by O, NR 4, -CO-, NR 4 CO 2 -, -CO 2 -, - NR 4 CONR 4 -, -CH=CH-, -C=C-, or denotes cycloalkyl or cycloalkylalkylen having 3-7 ring C atoms, or denotes Het 1; Z is a branched or linear alkyl having 2 to 12 C-atoms, wherein one or more, preferably 1 to 7 H-atoms are replaced by Hal, OR 4, CN, CO 2 R 4, CF 3, cycloalkyl having 3 to 7 ring carbon atoms, Ar 2, N(R 4) 2 and/or wherein one or more, preferably 1 to 7 CH 2 -groups are replaced by O, NR 4, S, -CO-, NR 4 CO 2 -, -NR 4 CONR 4 -, -CH=CH-, -C=C-, or denotes cycloalkyl or cycloalkylalkylen having 3-7 ring C atoms; Hal is F, Cl, Br or I; Ar 2 denotes a monocyclic or bicyclic, unsaturated or aromatic carbocyclic ring having 6 to 14 carbon atoms which may be unsubstituted, monosubstituted, disubstituted or trisubstituted by substitutents selected from Z, F, Br, I, -OR 4, - (CH 2)OR 4, -(CH 2)N(R 4) 2, Perfluoro-alkoxy, -SO 2 R 4, -CN, -NO 2, -N(R 4) 2, -CO(NR 4) 2, (NR 4)COR 4, -CO 2 R 4, -COR 4, -SO 2 N(R 4) 2, -SO 2 (C 1 -C 6)alkyl, NR 4 SO 2 (C 1 -C 6)alkyl, - (CH 2) n Het 1, -OHet 1, or Ar 2 denotes a monocyclic or bicyclic, unsaturated or aromatic carbocyclic ring having 6 to 14 carbon atoms which may be monosubstituted, disubstituted or trisubstituted by CF 3; Het 1 denotes a monocyclic saturated, unsaturated or aromatic heterocyclic ring or a bicyclic, saturated, or unsaturated heterocyclic ring having 1 to 4 N and/or O atoms which may be unsubstituted, monosubstituted, disubstituted or trisubstituted by substitutents selected from A, Hal, -OR 4, -(CH 2)OR 4, Perfluoro-alkyl, Perfluoro-alkoxy, -SO 2 (R 4) 2, CN, NO 2, -N(R 4) 2, -CO(NR 4) 2, (NR 4)COR 4, -CO 2 R 4, -COR 4, -SO 2 N(R 4) 2, - SO 2 alkyl, NR 4 SO 2 alkyl, NR 4 SO 2 alkyl, or C 1 -C 6 alkyl; Cyc denotes a saturated or unsaturated carbocyclic ring containing 3 to 7 carbon atoms which may be substituted by Hal, A, (C 1 -C 6)alkyl, -[C(R 4) 2] n -cycloalkyl, OR 4, CF 3, OCF 3, N(R 4) 2, NR 4 CON(R 4) 2, NO 2, CN, -[C(R 4) 2] n -COOR 4, -[C(R 4) 2] n -CON(R 4) 2, NR 4 COA, NR 4 SO 2 A, COR 4, CO 2 R 4, SO 2 N(R 4) 2, SOA, and/or SO 2 A; R 4 is H, A, Cyc or (C 1 -C 6)alkyl; n is 1, 2, 3 or 4; and solvates, tautomers, salts and stereo-isomers thereof, including mixtures thereof in all ratios. R 1 is selected from the following groups: R 2 is selected from the following groups: R 3 denotes Ar 2, Het 1, Cyc or A; A is a branched or linear alkyl having 2 to 12 C-atoms, wherein one or more, preferably 1 to 7 H-atoms may be replaced by Hal, OR 4, CN, CO 2 R 4, CF 3, cycloalkyl having 3 to 7 ring carbon atoms, Ar 2, or N(R 4) 2 and wherein one or more, preferably 1 to 7 non-adjacent CH 2 -groups may be replaced by O, NR 4, -CO-, NR 4 CO 2 -, -CO 2 -, - NR 4 CONR 4 -, -CH=CH-, -C=C-, or denotes cycloalkyl or cycloalkylalkylen having 3-7 ring C atoms, or denotes Het 1; Z is a branched or linear alkyl having 2 to 12 C-atoms, wherein one or more, preferably 1 to 7 H-atoms are replaced by Hal, OR 4, CN, CO 2 R 4, CF 3, cycloalkyl having 3 to 7 ring carbon atoms, Ar 2, N(R 4) 2 and/or wherein one or more, preferably 1 to 7 CH 2 -groups are replaced by O, NR 4, S, -CO-, NR 4 CO 2 -, -NR 4 CONR 4 -, -CH=CH-, -C=C-, or denotes cycloalkyl or cycloalkylalkylen having 3-7 ring C atoms; Hal is F, Cl, Br or I; Ar 2 denotes a monocyclic or bicyclic, unsaturated or aromatic carbocyclic ring having 6 to 14 carbon atoms which may be unsubstituted, monosubstituted, disubstituted or trisubstituted by substitutents selected from Z, F, Br, I, -OR 4, - (CH 2)OR 4, -(CH 2)N(R 4) 2, Perfluoro-alkoxy, -SO 2 R 4, -CN, -NO 2, -N(R 4) 2, -CO(NR 4) 2, (NR 4)COR 4, -CO 2 R 4, -COR 4, -SO 2 N(R 4) 2, -SO 2 (C 1 -C 6)alkyl, NR 4 SO 2 (C 1 -C 6)alkyl, - (CH 2) n Het 1, -OHet 1, or Ar 2 denotes a monocyclic or bicyclic, unsaturated or aromatic carbocyclic ring having 6 to 14 carbon atoms which may be monosubstituted, disubstituted or trisubstituted by CF 3; Het 1 denotes a monocyclic saturated, unsaturated or aromatic heterocyclic ring or a bicyclic, saturated, or unsaturated heterocyclic ring having 1 to 4 N and/or O atoms which may be unsubstituted, monosubstituted, disubstituted or trisubstituted by substitutents selected from A, Hal, -OR 4, -(CH 2)OR 4, Perfluoro-alkyl, Perfluoro-alkoxy, -SO 2 (R 4) 2, CN, NO 2, -N(R 4) 2, -CO(NR 4) 2, (NR 4)COR 4, -CO 2 R 4, -COR 4, -SO 2 N(R 4) 2, - SO 2 alkyl, NR 4 SO 2 alkyl, NR 4 SO 2 alkyl, or C 1 -C 6 alkyl; Cyc denotes a saturated or unsaturated carbocyclic ring containing 3 to 7 carbon atoms which may be substituted by Hal, A, (C 1 -C 6)alkyl, -[C(R 4) 2] n -cycloalkyl, OR 4, CF 3, OCF 3, N(R 4) 2, NR 4 CON(R 4) 2, NO 2, CN, -[C(R 4) 2] n -COOR 4, -[C(R 4) 2] n -CON(R 4) 2, NR 4 COA, NR 4 SO 2 A, COR 4, CO 2 R 4, SO 2 N(R 4) 2, SOA, and/or SO 2 A; R 4 is H, A, Cyc or (C 1 -C 6)alkyl; n is 1, 2, 3 or 4;