1H-PYRAZOL-DERIVATE, VERFAHREN ZU IHRER HERSTELLUNG, UND IHRE VERWENDUNG ALS NITRIFIKATIONSINHIBITOREN

摘要

The invention relates to 1H-pyrazol derivatives corresponding to general formula (I), wherein R<1> and R<3>, independently of each other, represent H or a C1-C4-alkyl radical, R<2> represents H, halogen or a C1-C4-alkyl radical, R<1> and R<2>, together, represent a five or six-membered cycloalkyl radical, R<4> and R<5>, independently of each other, represent H or Cl, and X represents OR<6> or NHR<7>, R<6> representing C1-C4-alkyl, C6-C10-aryl or alkylaryl with C1-C4-alkyl- and C6-C10-aryl groups and R<7> representing C1-C8-alkyl or C6-C10-aryl. The inventive compounds are suitable for inhibiting or controlling nitrification. In addition to their good nitrification-inhibiting effect, the compounds have a low hydrolysis tendency and can be applied particularly well to the surface of the fertiliser due to their hydrophobic properties.