The present invention provides a novel compound having an excellent PDE4 inhibitory activity and TNF-α production-suppressing activity, and also provides a preventive and therapeutic agent for atopic dermatitis or the like. The present invention includes a novel phthalazinone derivative of the following general structural formula [1] or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition comprising it as an active ingredient.
In the structural formula [1], the partial structure bridging the 6-position and the 7-position represents a single bond or a double bond; R
1
and R
2
are the same or different and each represents alkyl or the like; Y represents phenylene or the like; Z represents alkylene or the like; and R
3
represents a mono- to tri-cyclic saturated or unsaturated cyclic amino group or the like optionally substituted with R
31
and R
32
, wherein R
31
and R
32
represent alkyl or the like.
本发明提供了一种具有优异的PDE4抑制活性和TNF-α产生抑制活性的新型化合物,同时还提供了预防和治疗特应性皮炎或类似疾病的药物。本发明包括以下一般结构式[1]的新型邻苯二酮衍
生物或其药学上可接受的盐,以及包含其作为活性成分的制药组合物。在结构式[1]中,连接6位和7位的部分结构代表单键或双键;R1和R2相同或不同,分别代表烷基或类似物;Y代表苯撑基或类似物;Z代表烷基或类似物;R3代表单环至
三环饱和或不饱和环状
氨基或类似物,可选地被R31和
R32取代,其中R31和
R32代表烷基或类似物。