The present invention relates to compounds of formula (I) in which R1, R2, R3, R4, R5, R6, R7 and m are described as modulators of nicotinic acetylcholine receptors, in particular α7 subtypes, tautomers thereof The sexes, their stereoisomers, and their pharmaceutically acceptable salts, their pharmaceutical compositions, and combinations thereof with other suitable agents are disclosed. Also disclosed are processes for the preparation of the compounds, their treatment, in particular their use in the prevention and / or treatment of disorders such as Alzheimer's disease, mild cognitive impairment, and senile dementia.本発明は、ニコチン作動性アセチルコリン受容体、特にα7サブタイプのモジュレータとして、式中R1、R2、R3、R4、R5、R6、R7およびmが記載された式(I)の化合物、その互変異性体、その立体異性体、およびその薬学的に受容可能な塩、その医薬組成物、およびそれらと適切な他の薬剤との組み合わせを開示する。また、前記化合物の調製の工程、その治療、特に、アルツハイマー病、軽度の認知障害、および老人性認知症などの障害の予防および/または治療における用途について開示する。