Abstract: 7-(R)-Aminotriazolopyrimidines of the formula I where the substituents and the index are as defined below: R1 is hydrogen or methyl; R2 is methyl; R3 is C2-C1o-alkyl, C1-C4-alkoxymethyl, C3-C1o-cycloalkyl; R4 is halogen, Cl-C4-alkyl, C1-C4-haloalkyl or Cl-C4-alkoxy; n is a number from 1 to 5; Y is halogen, cyano, Cl-C4-alkyl or Cl-C4-alkoxy; where * is a center of chirality in the R configuration, processes for preparing these compounds, compositions comprising them and their use for controlling harmful fungi are described.

Abstract: 5-Alkyl-7-aminotriazolopyrimidines of the formula I, where: R1, R2 are hydrogen, alkyl, alkenyl, alkynyl, haloalkyl, cycloalkyl, phenyl, naphthyl; 5- or 6-membered saturated, unsaturated or aromatic heterocyclyl which contains one to four nitrogen atoms or one to three nitrogen atoms and one sulfur or oxygen atom; or R1 and R2 together with the bridging nitrogen atom can form a 5- or 6-membered ring which contains one to four nitrogen atoms or one to three nitrogen atoms and one sulfur or oxygen atom; R3 is cycloalkyl or bicycloalkyl; where R1, R2 and R3 may be substituted as outlined in the description; X is alkyl or haloalkyl; and their salts; processes and intermediates for their preparation, compositions comprising them and their use for controlling phytopathogenic harmful fungi are described.

Abstract: 2-Mercapto-substituted triazolopyrimidines of the formula I in which the substituents are as defined below: L is halogen, cyano, nitro, alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, alkoxy, alkenyloxy, alkynyloxy, haloalkoxy or —C(?O)-A; A is hydrogen, hydroxyl, alkyl, alkenyl, alkoxy, haloalkoxy, alkylamino or dialkylamino; m is 0, 1, 2, 3, 4 or 5; X is halogen, cyano, alkyl, haloalkyl, alkoxy or haloalkoxy; R1, R2 are hydrogen, alkyl, haloalkyl, cycloalkyl, halocycloalkyl, alkenyl, alkadienyl, haloalkenyl, cycloalkenyl, alkynyl, haloalkynyl or cycloalkynyl, phenyl, naphthyl or a five- to ten-membered saturated, partially unsaturated or aromatic heterocycle which contains one to four hetero atoms from the group consisting of O, N and S; R1 and R2 together with the nitrogen atom to which they are attached may also form a five- or six-membered ring which may be interrupted by an atom from the group consisting of O, N and S; where R1 and/or R2 may be substituted as stated in the description; processes