Reivindicación 1: Uso de un compuesto conforme a la fórmula (1) para controlar hongos fitopatogénicos en plantas, siendo que X es flúor o cloro; R¹, R² considerados en forma independiente se seleccionan a partir del conjunto que consiste en hidrógeno, ciano, C₁₋₈-alquilo, C₁₋₈-haloalquilo, C₂₋₈-alquenilo, C₂₋₈-haloalquenilo, C₂₋₈-alquinilo, C₂₋₈-haloalquinilo, C₃₋₇-carbociclilo, arilo, heterociclilo de 3 a 10 miembros, heteroarilo, aril-C₁₋₈-alquilo, heterociclilo de 3 a 10 miembros-C₁₋₈-alquilo, heteroaril-C₁₋₈-alquilo y C₃₋₇-carbociclil-C₁₋₈-alquilo, siendo que dichos R¹ y R² acíclicos pueden estar sustituidos con, respectivamente, uno o más sustituyentes R¹ᵃ y R²ᵃ y dichos R¹ y R² cíclicos pueden estar sustituidos con, respectivamente, uno o más sustituyentes R¹ᵇ y R²ᵇ, o R¹, R² pueden formar, junto con el átomo de carbono al que están unidos, un C₃₋₇-carbociclilo o un heterociclilo de 3 a 10 miembros, siendo que dicho C₃₋₇-carbociclilo o heterociclilo de 3 a 10 miembros puede estar sustituido con uno o más sustituyentes R¹ᵇ; Cy es arilo, heteroarilo, C₃₋₁₀-carbociclilo o heterociclilo de 3 a 10 miembros; n es 0, 1, 2, 3 ó 4; R³ considerado en forma independiente se selecciona a partir del conjunto que consiste en halógeno, ciano, hidroxi, amino, nitro, carboxilo, sulfanilo, pentafluoro-l⁶-sulfanilo, formilo, carbamoilo, carbamato, C₁₋₆-alquilo, C₁₋₆-cianoalquilo, C₁₋₆-haloalquilo, C₂₋₆-alquenilo, C₂₋₆-haloalquenilo, C₂₋₆-alquinilo, C₂₋₆-haloalquinilo, C₁₋₆-alcoxi, C₁₋₆-haloalcoxi, C₁₋₆-alcoxi-C₁₋₆-alquilo, C₁₋₆-alquilsulfanilo, C₁₋₆-haloalquilsulfanilo, C₁₋₈-alquilsulfinilo, C₁₋₈-haloalquilsulfinilo, C₁₋₈-alquilsulfonilo, C₁₋₈-haloalquilsulfonilo, C₃₋₇-carbociclilo, C₃₋₇-halocarbociclilo, C₁₋₆-hidroxialquilo, C₁₋₆-alquilamino, di-C₁₋₆-alquilamino, C₁₋₆-alquilcarbonilo, C₁₋₆-alcoxicarbonilo, C₁₋₆-haloalcoxicarbonilo, C₁₋₆-alquilcarbamoilo, di-C₁₋₆-alquilcarbamoilo, aminocarbonilo, C₁₋₈-alquilcarboniloxi, C₁₋₈-haloalquilcarboniloxi, C₁₋₈-alquilcarbonilamino, C₁₋₈-haloalquilcarbonilamino, C₁₋₆-alquilsulfonilamino, C₁₋₆-haloalquilsulfonilamino, sulfamoilo, C₁₋₈-alquilsulfamoilo, di-C₁₋₈-alquilsulfamoilo, arilo (por ejemplo fenilo), aril-C₁₋₆-alquilo y heteroarilo, siendo que dichos R³ acíclicos y cíclicos pueden estar sustituidos con uno o más sustituyentes, los cuales pueden ser el mismo o diferentes, a seleccionar a partir del conjunto que consiste en halógeno, C₁₋₆-alquilo, C₁₋₆-haloalquilo, C₁₋₆-alcoxi y C₁₋₆-haloalcoxi; R⁴ se selecciona a partir del conjunto que consiste en hidrógeno, hidroxi, formilo, C₁₋₆-alquilo, C₁₋₆-haloalquilo, C₂₋₆-alquenilo, C₂₋₆-haloalquenilo, C₂₋₆-alquinilo, C₂₋₆-haloalquinilo, -C(=O)-C₁₋₆-alquilo, -C(=O)-C₁₋₆-haloalquilo, -C(=S)-C₁₋₆-alquilo, -C(=S)-C₁₋₆-haloalquilo, -C(=O)-O-C₁₋₆-alquilo, -C(=O)-O-C₁₋₆-haloalquilo, C₁₋₆-alcoxi, C₁₋₆-haloalcoxi, C₁₋₆-alquilsulfonilo, C₁₋₆-haloalquilsulfonilo, fenilsulfonilo, C₃₋₁₀-carbociclilo, heterociclilo de 3 a 10 miembros, arilo (fenilo), heteroarilo, C₃₋₁₀-carbociclil-C₁₋₆-alquilo, C₃₋₁₀-carbociclil-C₁₋₆-haloalquilo, aril-C₁₋₆-alquilo, aril-C₁₋₆-haloalquilo, heteroaril-C₁₋₆-alquilo y heteroaril-C₁₋₆-haloalquilo, siendo que dichos R⁴ cíclicos y acíclicos pueden estar sustituidos con uno o más sustituyentes a seleccionar a partir del conjunto que consiste en halógeno, ciano, C₁₋₆-alquilo, C₁₋₆-haloalquilo, C₁₋₆-alcoxi y C₁₋₆-haloalcoxi; R⁵ es hidrógeno o flúor; R¹ᵃ, R²ᵃ considerados en forma independiente se seleccionan a partir del conjunto que consiste en nitro, hidroxilo, ciano, carboxilo, amino, sulfanilo, pentafluoro-l⁶-sulfanilo, formilo, carbamoilo, carbamato, C₃₋₇-cicloalquilo, C₃₋₇-halocicloalquilo, C₁₋₈-alquilamino, di-C₁₋₈-alquilamino, C₁₋₈-alcoxi, C₁₋₈-haloalcoxi, C₁₋₈-alquilsulfanilo, C₁₋₈-haloalquilsulfanilo, C₁₋₈-alquilcarbonilo, C₁₋₈-haloalquilcarbonilo, C₁₋₈-alquilcarbamoilo, di-C₁₋₈-alquilcarbamoilo, C₁₋₈-alcoxicarbonilo, C₁₋₈-haloalcoxicarbonilo, C₁₋₈-alquilcarboniloxi, C₁₋₈-haloalquilcarboniloxi, C₁₋₈-alquilcarbonilamino, C₁₋₈-haloalquilcarbonilamino, C₁₋₈-alquilsulfinilo, C₁₋₈-haloalquilsulfinilo, C₁₋₈-alquilsulfonilo, C₁₋₈-haloalquilsulfonilo, C₁₋₈-alquilsulfonilamino, C₁₋₈-haloalquilsulfonilamino, sulfamoilo, C₁₋₈-alquilsulfamoilo y di-C₁₋₈-alquilsulfamoilo; R¹ᵇ, R²ᵇ considerados en forma independiente se seleccionan a partir del conjunto que consiste en halógeno, ciano, hidroxi, amino, nitro, carboxilo, sulfanilo, pentafluoro-l⁶-sulfanilo, formilo, carbamoilo, carbamato, C₁₋₆-alquilo, C₁₋₆-cianoalquilo, C₁₋₆-haloalquilo, C₂₋₆-alquenilo, C₂₋₆-haloalquenilo, C₂₋₆-alquinilo, C₂₋₆-haloalquinilo, C₁₋₆-alcoxi, C₁₋₆-haloalcoxi, C₁₋₆-alcoxiC₁₋₆-alquilo, C₁₋₆-alquilsulfanilo, C₁₋₆-haloalquilsulfanilo, C₁₋₈-alquilsulfinilo, C₁₋₈-haloalquilsulfinilo, C₁₋₈-alquilsulfonilo, C₁₋₈-haloalquilsulfonilo, C₁₋₆-alquil-C(=O)-NH-, C₃₋₇-carbociclilo, C₃₋₇-halocarbociclilo, hidroxi-C₁₋₆-alquilo, C₁₋₆-alquilamino, di-C₁₋₆-alquilamino, C₁₋₆-alquilcarbonilo, C₁₋₆-alcoxicarbonilo, C₁₋₆-haloalcoxicarbonilo, C₁₋₆-alquilcarbamoilo, di-C₁₋₆-alquilcarbamoilo, aminocarbonilo, C₁₋₈-alquilcarboniloxi, C₁₋₈-haloalquilcarboniloxi, C₁₋₈-alquilcarbonilamino, C₁₋₈-haloalquilcarbonilamino, C₁₋₆-alquilsulfonilamino, C₁₋₆-haloalquilsulfonilamino, sulfamoilo, C₁₋₈-alquilsulfamoilo, di-C₁₋₈-alquilsulfamoilo, arilo (por ejemplo fenilo), aril-C₁₋₆-alquilo y heteroarilo, siendo que dicho arilo (fenilo) o heteroarilo opcionalmente está sustituido con uno o más sustituyentes, los cuales pueden ser el mismo o diferentes, a seleccionar a partir del conjunto que consiste en halógeno, C₁₋₆-alquilo, C₁₋₆-haloalquilo, C₁₋₆-alcoxi y C₁₋₆-haloalcoxi; o una sal N-óxido o solvato de dicha estructura; siendo que el compuesto conforme a la fórmula (1) no es: (a) N-[1-(piridin-2-il)ciclobutil)-5-[5-(trifluorometil)-1,2,4-oxadiazol-3-il]pirimidin-2-amina; (b) 5-{5-[cloro(difluoro)metil)-1,2,4-oxadiazol-3-il}-N-[1-(piridin-2-il)ciclobutil]pirimidin-2-amina; (c) N-(1-fenilciclopropil)-5-[5-(trifluorometil)-1,2,4-oxadiazol-3-il]pirimidin-2-amina; (d) 5-{5-[cloro(difluoro)metil)-1,2,4-oxadiazol-3-il}-N-(1-fenilciclopropil)pirimidin-2-amina. Reivindicación 13: Un método para controlar hongos fitopatogénicos que comprende el paso de aplicar al menos un compuesto conforme a la fórmula (1) conforme a una cualquiera de las reivindicaciones 1 a 12 a las plantas, las partes de planta, las semillas, las frutas o el suelo en el que crecen las plantas. Reivindicación 14: Un compuesto conforme a la fórmula (1) o un sal, N-óxido o solvato de dicha estructura; siendo que X, R¹, R², R³, R⁴, R⁵, Cy y n son tal como se definen en cualquiera de las reivindicaciones 1 a 12, siendo que cuando X es flúor y R⁴ es hidrógeno o C₁₋₆-alquilo, R¹ y R² no son ambos hidrógeno; siendo que se excluyen los compuestos en los que X es flúor, Cy es fenilo o heteroarilo de 6 miembros, n es 0 y R¹, R² y R⁴ se seleccionan, considerando cada uno en forma independiente, a partir de hidrógeno y C₁₋₃-alquilo; y siendo que el compuesto conforme a la fórmula (1) no es: (a) N-[1-(piridin-2-il)ciclobutil)-5-[5-(trifluorometil)-1,2,4-oxadiazol-3-il]pirimidin-2-amina; (b) 5-{5-[cloro(difluoro)metil)-1,2,4-oxadiazol-3-il}-N-[1-(piridin-2-il)ciclobutil]pirimidin-2-amina; (c) N-(1-fenilciclopropil)-5-[5-(trifluorometil)-1,2,4-oxadiazol-3-il]pirimidin-2-amina; (d) 5-{5-[cloro(difluoro)metil)-1,2,4-oxadiazol-3-il}-N-(1-fenilciclopropil)pirimidin-2-amina; (e) N-[1-(2-metilpiridin-4-il)etil)-5-[5-(trifluorometil)-1,2,4-oxadiazol-3-il]pirimidin-2-amina. Reivindicación 16: Una composición que comprende al menos un compuesto conforme a la fórmula (1) conforme a la reivindicación 14 ó 15 y al menos un vehículo apto para uso agrícola.Claim 1: Use of a compound according to formula (1) to control phytopathogenic fungi in plants, where X is fluorine or chlorine; R¹, R² taken independently are selected from the group consisting of hydrogen, cyano, C₁₋₈-alkyl, C₁₋₈-haloalkyl, C₂₋₈-alkenyl, C₂₋₈-haloalkenyl, C₂₋₈-alkynyl, C₂₋₈-haloalkynyl, C₃₋₇-carbocyclyl, aryl, 3-10 membered heterocyclyl, heteroaryl, aryl-C₁₋₈-alkyl, 3-10 membered heterocyclyl-C₁₋₈-alkyl, heteroaryl-C₁₋₈- alkyl and C₃₋₇-carbocyclyl-C₁₋₈-alkyl, wherein said acyclic R¹ and R² may be substituted with, respectively, one or more R¹ᵃ and R²ᵃ substituents and said cyclic R¹ and R² may be substituted with, respectively, one or further substituents R¹ᵇ and R²ᵇ, or R¹, R² may form, together with the carbon atom to which they are attached, a C₃₋₇-carbocyclyl or a 3- to 10-membered heterocyclyl, said C₃₋₇-carbocyclyl or heterocyclyl being 3 to 10 members may be substituted with one or more R¹ᵇ substituents; Cy is 3- to 10-membered aryl, heteroaryl, C₃₋₁₀-carbocyclyl or heterocyclyl; n is 0, 1, 2, 3 or 4; R³ taken independently is selected from the group consisting of halogen, cyano, hydroxy, amino, nitro, carboxyl, sulfanyl, pentafluoro-l⁶-sulfanyl, formyl, carbamoyl, carbamate, C₁₋₆-alkyl, C₁₋₆- cyanoalkyl, C₁₋₆-haloalkyl, C₂₋₆-alkenyl, C₂₋₆-haloalkenyl, C₂₋₆-alkynyl, C₂₋₆-haloalkynyl, C₁₋₆-alkoxy, C₁₋₆-haloalkoxy, C₁₋₆-alkoxy - ₇-halocarbocyclyl, C₁₋₆-hydroxyalkyl, C₁₋₆-alkylamino, di-C₁₋₆-alkylamino, C₁₋₆-alkylcarbonyl, C₁₋₆-alkoxycarbonyl, C₁₋₆-haloalkoxycarbonyl, C₁₋₆-alkylcarbamoyl, di- C₁₋₆-alkylcarbamoyl, aminocarbonyl, C₁₋₈-alkylcarbonyloxy, C₁₋₈-haloalkylcarbonyloxy, C₁₋₈-alkylcarbonylamino, C₁₋₈-haloalkylcarbonylamino, C₁₋₆-alkylsulfonylamino, C₁₋₆-haloalkylsulfonyl, C₁-amino, sulfamo alkylsulfamoyl, di-C₁₋₈-alkylsulfamoyl, aryl (for example phenyl), aryl-C₁₋₆-alkyl and heteroaryl, wherein said acyclic and cyclic R³ may be substituted with one or more substituents, which may be the same or different, to be selected from the group consisting of halogen, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy and C₁₋₆-haloalkoxy; R⁴ is selected from the group consisting of hydrogen, hydroxy, formyl, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₂₋₆-alkenyl, C₂₋₆-haloalkenyl, C₂₋₆-alkynyl, C₂₋₆- haloalkynyl, -C(=O)-C₁₋₆-alkyl, -C(=O)-C₁₋₆-haloalkyl, -C(=S)-C₁₋₆-alkyl, -C(=S)-C₁₋ ₆-haloalkyl, -C(=O)-O-C₁₋₆-alkyl, -C(=O)-O-C₁₋₆-haloalkyl, C₁₋₆-alkoxy, C₁₋₆-haloalkoxy, C₁₋₆- alkylsulfonyl, C₁₋₆-haloalkylsulfonyl, phenylsulfonyl, C₃₋₁₀-carbocyclyl, 3- to 10-membered heterocyclyl, aryl (phenyl), heteroaryl, C₃₋₁₀-carbocyclyl-C₁₋₆-alkyl, C₃₋₁₋-carbocyclyl- ₆-haloalkyl, aryl-C₁₋₆-alkyl, aryl-C₁₋₆-haloalkyl, heteroaryl-C₁₋₆-alkyl, and heteroaryl-C₁₋₆-haloalkyl, wherein said cyclic and acyclic R⁴ may be substituted with one or more substituents to be selected from the group consisting of halogen, cyano, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy, and C₁₋₆-haloalkoxy; R⁵ is hydrogen or fluorine; R¹ᵃ, R²ᵃ taken independently are selected from the group consisting of nitro, hydroxyl, cyano, carboxyl, amino, sulfanyl, pentafluoro-l⁶-sulfanyl, formyl, carbamoyl, carbamate, C₃₋₇-cycloalkyl, C₃₋₇- halocycloalkyl, C₁₋₈-alkylamino, di-C₁₋₈-alkylamino, C₁₋₈-alkoxy, C₁₋₈-haloalkoxy, C₁₋₈-alkylsulfanyl, C₁₋₈-haloalkylsulfanyl, C₁₋₈-alkylcarbonyl, C₁₋₈- haloalkylcarbonyl, C₁₋₈-alkylcarbamoyl, di-C₁₋₈-alkylcarbamoyl, C₁₋₈-alkoxycarbonyl, C₁₋₈-haloalkoxycarbonyl, C₁₋₈-alkylcarbonyloxy, C₁₋₈-haloalkylcarbonyloxy, C₁₋₋₈-alkylcarbonylamino, C₁₋₈-alkylcarbonylamino, haloalkylcarbonylamino, C₁₋₈-alkylsulfinyl, C₁₋₈-haloalkylsulfinyl, C₁₋₈-alkylsulfonyl, C₁₋₈-haloalkylsulfonyl, C₁₋₈-alkylsulfonylamino, C₁₋₈-haloalkylsulfonylamino, sulfamoyl, C₁₋₁-di- ₈-alkylsulfamoyl; R¹ᵇ, R²ᵇ taken independently are selected from the group consisting of halogen, cyano, hydroxy, amino, nitro, carboxyl, sulfanyl, pentafluoro-l⁶-sulfanyl, formyl, carbamoyl, carbamate, C₁₋₆-alkyl, C₁₋ ₆-Cyanoalkyl, C₁₋₆-haloalkyl, C₂₋₆-alkenyl, C₂₋₆-haloalkenyl, C₂₋₆-alkynyl, C₂₋₆-haloalkynyl, C₁₋₆-alkoxy, C₁₋₆-haloalkoxy, C₆₋-₆ C₁₋₆-alkoxy-alkyl, C₁₋₆-alkylsulfanyl, C₁₋₆-haloalkylsulfanyl, C₁₋₈-alkylsulfinyl, C₁₋₈-haloalkylsulfinyl, C₁₋₈-alkylsulfonyl, C₁₋₈-haloalkylsulfonyl, C₆-alkyl-C₋( =O)-NH-, C₃₋₇-carbocyclyl, C₃₋₇-halocarbocyclyl, hydroxy-C₁₋₆-alkyl, C₁₋₆-alkylamino, di-C₁₋₆-alkylamino, C₁₋₆-alkylcarbonyl, C₁₋₆ -alkoxycarbonyl, C₁₋₆-haloalkoxycarbonyl, C₁₋₆-alkylcarbamoyl, di-C₁₋₆-alkylcarbamoyl, aminocarbonyl, C₁₋₈-alkylcarbonyloxy, C₁₋₈-haloalkylcarbonyloxy, C₁₋₁-alkylcarbonylamino, C₁₋,halo-alkylcarbonyl ₋₆-alkylsulfonylamino, C₁₋₆-haloalkylsulfonylamino, sulfamoyl, C₁₋₈-alkylsulfamoyl, di-C₁₋₈-alkylsulfamoyl, aryl (for example phenyl), aryl-C₁₋₆-alkyl and heteroaryl, wherein said aryl (phenyl) or heteroaryl is optionally substituted with one or more substituents, which may be the same or different, to be selected from the group consisting of halogen, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy, and C₁₋₆-haloalkoxy; or an N-oxide salt or solvate of said structure; wherein the compound according to formula (1) is not: (a) N-[1-(pyridin-2-yl)cyclobutyl)-5-[5-(trifluoromethyl)-1,2,4-oxadiazole-3 -yl]pyrimidin-2-amine; (b) 5-{5-[chloro(difluoro)methyl)-1,2,4-oxadiazol-3-yl}-N-[1-(pyridin-2-yl)cyclobutyl]pyrimidin-2-amine; (c) N-(1-phenylcyclopropyl)-5-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]pyrimidin-2-amine; (d) 5-{5-[chloro(difluoro)methyl)-1,2,4-oxadiazol-3-yl}-N-(1-phenylcyclopropyl)pyrimidin-2-amine. Claim 13: A method for controlling phytopathogenic fungi comprising the step of applying at least one compound according to formula (1) according to any one of claims 1 to 12 to plants, plant parts, seeds, fruits or the soil in which the plants grow. Claim 14: A compound according to formula (1') or a salt, N-oxide or solvate of said structure; wherein X, R¹, R², R³, R⁴, R⁵, Cy and n are as defined in any of claims 1 to 12, wherein when X is fluorine and R⁴ is hydrogen or C₁₋₆-alkyl, R¹ and R² they are not both hydrogen; with compounds wherein X is fluorine, Cy is phenyl or 6-membered heteroaryl, n is 0 and R¹, R² and R⁴ are selected, each considered independently, from hydrogen and C₁₋₃- I rent; and where the compound according to formula (1') is not: (a) N-[1-(pyridin-2-yl)cyclobutyl)-5-[5-(trifluoromethyl)-1,2,4-oxadiazole -3-yl]pyrimidin-2-amine; (b) 5-{5-[chloro(difluoro)methyl)-1,2,4-oxadiazol-3-yl}-N-[1-(pyridin-2-yl)cyclobutyl]pyrimidin-2-amine; (c) N-(1-phenylcyclopropyl)-5-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]pyrimidin-2-amine; (d) 5-{5-[chloro(difluoro)methyl)-1,2,4-oxadiazol-3-yl}-N-(1-phenylcyclopropyl)pyrimidin-2-amine; (e) N-[1-(2-methylpyridin-4-yl)ethyl)-5-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]pyrimidin-2-amine. Claim 16: A composition comprising at least one compound according to formula (1') according to claim 14 or 15 and at least one vehicle suitable for agricultural use.