The invention relates to sulfonamide derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes.
More particularly the invention relates to new sulfonamide Nav1.7 inhibitors of formula (I):
or pharmaceutically acceptable salts thereof, wherein Z
1
, R
a
, R
b
, R
1
, R
2
, R
3
, R
4
and R
5
are as defined in the description.
Nav 1.7 inhibitors are potentially useful in the treatment of a wide range of disorders, particularly pain.
该发明涉及磺胺衍生物,其在医学上的应用,含有它们的组合物,其制备方法以及用于这些方法的中间体。
更具体地,该发明涉及公式(I)的新磺胺基Nav1.7抑制剂:
或其药学上可接受的盐,其中Z
1
,R
a
,R
b
,R
1
,R
2
,R
3
,R
4
和R
5
如描述中所定义。
Nav 1.7抑制剂在治疗各种疾病,特别是疼痛方面具有潜在用途。
Chemical compounds
申请人:Brown Alan Daniel
公开号:US08772293B2
公开(公告)日:2014-07-08
The invention relates to sulfonamide derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes.
More particularly the invention relates to new sulfonamide Nav1.7 inhibitors of formula (I):
or pharmaceutically acceptable salts thereof, wherein Z1, Ra, Rb, R1, R2, R3, R4 and R5 are as defined in the description.
Nav 1.7 inhibitors are potentially useful in the treatment of a wide range of disorders, particularly pain.
In a method for producing a de-dimethoxybenzylated compound by removing a dimethoxybenzyl group from a compound containing a dimethoxybenzyl group bonded to a nitrogen atom in the presence of an acid, the de-dimethoxybenzylated compound is obtained by removing the dimethoxybenzyl group without forming a poorly soluble product resulting from the removed dimethoxybenzyl group. The de-dimethoxybenzylation reaction is carried out in the presence of triphenylphosphine or diethylthiourea.