申请人:Sumitomo Dainippon Pharma Co., Ltd.
公开号:US20200017450A1
公开(公告)日:2020-01-16
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 R
1a
, R
1b
, R
1c
, and R
1d
are hydrogen, halogen, cyano, C
1-4
alkyl, C
1-4
alkoxy, etc., provided that at least one of R
1a
, R
1b
, R
1c
and R
1d
is the above C
6-10
aryl, C
6-10
aryloxy, etc., R
2
and R
3
are hydrogen, C
1-6
alkyl, C
3-10
cycloalkyl, etc., R
4
is hydrogen, C
1-6
alkyl, C
3-7
cycloalkyl, etc., m is 0, 1, or 2, L is CR
7
R
8
, R
7
and R
8
are hydrogen, hydroxy group, C
1-4
alkyl, C
1-4
alkoxy, etc., or a pharmaceutically acceptable salt thereof.
该发明涉及一种用于治疗或预防涉及Na通道的疾病的药物,例如神经痛、伤害性疼痛、炎症性疼痛、小纤维神经病、红细胞增多症、阵发性极端疼痛障碍、排尿困难或多发性硬化等,包括式(I)的化合物,其中R1a、R1b、R1c和R1d为氢、卤素、氰基、C1-4烷基、C1-4烷氧基等,但至少其中一个为上述的C6-10芳基、C6-10芳氧基等,R2和R3为氢、C1-6烷基、C3-10环烷基等,R4为氢、C1-6烷基、C3-7环烷基等,m为0、1或2,L为CR7R8,R7和R8为氢、羟基、C1-4烷基、C1-4烷氧基等,或其药学上可接受的盐。