The present invention relates to fungicidal N-hetarylcarbonyl-2-(benzocycloalken-1-yl)piparidines or pyrrolidines, and their thiocarbonyl derivatives, their process of preparation and intermediate compounds for their preparation, their use as fungicides, particularly in the form of fungicidal compositions and methods for the control of phytopathogenic fungi of plants using these compounds or their compositions.本發明係關於殺真菌的N-雜芳基羰基-2-(苯并環烯-1-基)哌啶或吡咯啶及其等硫羰基衍生物,其等製備方法及用於其等製備之中間化合物,其等作為殺真菌劑(特定言之以殺真菌組合物之形式)之用途及使用此等化合物或其等組合物防治植物之植物病原性真菌的方法。