申请人:Sumitomo Dainippon Pharma Co., Ltd.
公开号:US11066372B2
公开(公告)日:2021-07-20
The present invention relates to a medicament for treating or preventing a disease involving Na channel, for example, neuropathic pain, nociceptive pain, inflammatory pain, small-fiber neuropathy, erythromelalgia, paroxysmal extreme pain disorder, dysuria, or multiple sclerosis, comprising a compound of formula (I) wherein R1a, R1b, R1c, and R1d are hydrogen, halogen, cyano, C1-4 alkyl, C1-4 alkoxy, etc., provided that at least one of R1a, R1b, R1c and R1d is the above C6-10 aryl, C6-10 aryloxy, etc., R2 and R3 are hydrogen, C1-6 alkyl, C3-10 cycloalkyl, etc., R4 is hydrogen, C1-6 alkyl, C3-7 cycloalkyl, etc., m is 0, 1, or 2, L is CR7R8, R7 and R8 are hydrogen, hydroxy group, C1-4 alkyl, C1-4 alkoxy, etc., or a pharmaceutically acceptable salt thereof.
本发明涉及一种用于治疗或预防涉及Na通道的疾病的药物,例如,神经病理性疼痛、痛觉疼痛、炎症性疼痛、小纤维神经病、红斑性疼痛、阵发性极度疼痛症、排尿困难或多发性硬化症,包括式(I)化合物 其中R1a、R1b、R1c和R1d为氢、卤素、氰基、C1-4烷基、C1-4烷氧基等、条件是 R1a、R1b、R1c 和 R1d 中至少有一个是上述 C6-10 芳基、C6-10 芳氧基等,R2 和 R3 是氢、C1-6 烷基、C3-10 环烷基等,R4 是氢、C1-6 烷基、C3-7 环烷基等,m 是 0、1 或 2,L 是 CR7R8,R7 和 R8 是氢、羟基、C1-4 烷基、C1-4 烷氧基等,或其药学上可接受的盐。