申请人:——
公开号:US20020160996A1
公开(公告)日:2002-10-31
Compounds represented by the formula:
1
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:
2
wherein ring B indicates a 5- to 7-membered ring, or
(ii) a group represented by the formula:
3
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.
由以下公式代表的化合物:
其中 R1 和 R2 是氢原子、烃基或杂环基,或者 R1 和 R2 可以与相邻的碳原子一起形成 3 至 8 个成员的同环或杂环环,W 表示
(i) 由以下公式代表的基团:
其中环 B 表示一个 5 至 7 个成员的环,或者
(ii) 由以下公式代表的基团:
其中 R4 表示 (1) 可以用芳香基取代的脂肪烃基,或者 (2) 含有芳香基的酰基,R5 是氢原子、C1-6 烷基或酰基,提供当 W 是 Wa 时,R3 是氢原子、烃基或杂环基,当 W 是 Wb 时,R3 表示一个 C6-14 芳基,或其盐或前药具有优异的抑制神经退行性等作用,以及出色的脑透过性,毒性低,因此可用作预防或治疗神经退行性疾病等的药物。