4,5-dicyanoimidazole derivs. of formula (I), and their addn. cpds. are new: R<1> = R or phenyl (opt. substd. by 1-3 halo, NO2, CN, T, TO, TS or (T')2N); R = 1-4C alkyl or 1-4C haloalkyl; T = 1-6C alkyl or 1-6C haloalkyl; T' = 1-6C alkyl; R1 = H, T, 1-6C hydroxyalkyl, 1-6C cyanoalkyl, or -(1-6C alkylenyl)-A; A = TO, TS, TSO, T'SO2, 1-6C hydroxyalkyl, T'OCO, T'CO, T'COO, COOH, phenyl or benzodioxolyl; phenyl opt. substd. by 1-3 Q, a 5-membered, aromatic, mono- or bi-cyclic heterocyclyl, contg. 1-3 N, O and/or S and opt. substd. by 1-3 halo or R; a 5-membered, non-aromatic mono- or bi-cyclic heterocyclyl contg. 1-3 N, O and/or S and opt. substd. by 1-3 halo or R; a six-membered, non-aromatic, mono- or bi-cyclic heterocyclyl contg. 1-3 N, O and/or S and opt. substd. by 1-3 Q' or by 1 Ar; or an aromatic, mono- or bi-cyclic, six-membered heterocyclyl contg. 1-3 N heteroatoms and opt. substd. by 1-3 Q<1>; Q = halo, NO2, CN, T, TO, TS, TSO, T'SO2, (T')2N, T'OCO, T'CO, T'COO, COOH, 1-6C hydroxyalkyl or 1-6C cyanoalkyl; Q' = 3-7C cycloalkyl or Q; Ar = phenyl, benzyl, benzdioxol-(1-4C)alkylenyl, pyridinyl, pyrimidyl or phenyl(1-4C)alkylenyl (all opt. ring substd. by 1-3 Q, with the exception of 1-6C hydroxyalkyl)); Q<1> = halo, NO2, CN, R, RO, 3-7C cycloalkyl, 1-4C hydroxyalkyl, R'CO, R'OCO, OH, CHO, phenyl (opt. substd. by 1-3 halo, NO2, 1-3C alkyl, 1-3C haloalkyl, 1-3C alkoxy or R'CO), pyridyl, pyrimidinyl, or R' (substd. by 1-3 R'O); R' = 1-4C alkyl; R2 = H, halo, CN, T, 1-6C cyanoalkyl, 1-6C hydroxyalkyl, TO, TS or 3-7C cycloalkyl; R3 = H, halo, T, CN, (T')2N or NO2. Also claimed are cpds. of formula (II).
