The present invention relates to aminothiazole derivatives of formula (I), their process of preparation, preparation intermediate compounds, their use as fungicide, acaricide or insecticide active agents, particularly in the form of fungicide, acaricide or insecticide compositions and methods for the control of phytopathogenic fungi, notably of plants, using these compounds or compositions. Formula (I) wherein R1 to R5 represent various substituents as described in the description.