申请人:Ohkawa Shigenori
公开号:US20050187238A1
公开(公告)日:2005-08-25
Compounds represented by the formula:
wherein R
1
and R
2
are hydrogen atom, a hydrocarbon group or a heterocyclic group, or R
1
and R
2
may form, together with the adjacent carbon atom, a 3- to 8-membered homocyclic or heterocyclic ring,
W indicates
(i) a group represented by the formula:
wherein ring B indicates a 5- to 7-membered ring, or
(ii) a group represented by the formula:
wherein R
4
indicates (1) an aliphatic hydrocarbon group, which may be substituted with an aromatic group, or (2) an acyl group containing an aromatic group, R
5
is hydrogen atom, a C
1-6
alkyl, or an acyl group, provided that, when W is Wa, R
3
is hydrogen atom, a hydrocarbon group or a heterocyclic group, when W is Wb, R
3
indicates a C
6-14
aryl group, or salts thereof or prodrugs thereof have an excellent action to inhibit neurodegeneration and the like as well as an excellent brain penetrability and are low in the toxicity, thereby being useful as prophylactic or therapeutic drugs for nerve degenerative diseases and the like.
该化合物的分子式为:其中R1和R2为氢原子、烃基或杂环基,或者R1和R2可以与相邻的碳原子结合形成3至8元环的同环或杂环;W表示(i)一个由以下式子表示的基团:其中环B表示一个5至7元环,或者(ii)一个由以下式子表示的基团:其中R4表示(1)一个脂肪烃基,可以被芳香基取代,或者(2)一个含有芳香基的酰基基团,R5为氢原子、C1-6烷基或酰基基团,当W为Wa时,R3为氢原子、烃基或杂环基,当W为Wb时,R3表示一个C6-14芳基基团。该化合物的盐或前药具有优异的神经退行性疾病等抑制作用,以及优异的脑穿透性和低毒性,因此可用作神经退行性疾病等的预防或治疗药物。