2,2-Diphenylbutanamide derivatives represented by the following formula (1):
[wherein A represents -(CH2)n- (n is 1 or 2) or a methine (CH) group; when A is -CH2-, B represents a methine group or a nitrogen atom, with A and B forming a single bond; when A is -(CH2)2-, B represents a nitrogen atom, with A and B forming a single bond; when A is a methine group, B represents a quaternary carbon atom, with A and B forming a double bond; each of R1 and R2, which are identical to or different from each other, represents a hydrogen atom, a lower alkyl group, or a cycloalkyl group, or R1 and R2 may form a heterocyclic ring together with the adjacent nitrogen atom; and Ar represents an optionally substituted phenyl group, bicyclic aromatic ring, monocyclic heterocyclic ring, bicyclic heterocyclic ring, or fluorene group]; or salts of the derivatives.
The derivatives or salts thereof exhibit excellent µ-opioid agonist activity and analgesic activity against neuropathic pain, and are useful as medicines such as peripheral analgesic drugs and neuropathic pain relieving drugs.
下式(1)代表的 2,2-二苯基丁酰胺衍
生物:
[其中 A 代表-(
CH2)n-(n 为 1 或 2)或
甲烷(CH)基;当 A 为- -时,B 代表
甲烷基或氮原子,A 和 B 形成单键;当 A 为-( )2-时,B 代表氮原子,A 和 B 形成单键;当 A 为
甲烷基时,B 代表季碳原子,A 和 B 形成双键;R1和R2(它们彼此相同或不同)各自代表氢原子、低级烷基或环烷基,或 R1和R2可与相邻的氮原子一起形成杂环;Ar代表任选取代的苯基、双环芳环、单环杂环、双环杂环或
芴基】;或衍
生物的盐。
这些衍
生物或其盐具有优异的μ-类阿片激动剂活性和针对神经病理性疼痛的镇痛活性,可用作外周
镇痛药物和神经病理性疼痛缓解药物。