申请人:Okano Masahiko
公开号:US20100022566A1
公开(公告)日:2010-01-28
The present invention relates to novel quinazoline derivatives with less skin irritation and an excellent action of strongly suppressing scratching behavior, and pharmaceutical compositions containing a quinazoline derivative as an active ingredient. The present invention is directed to the quinazoline derivatives represented by the general formula [1] or pharmaceutically acceptable salts thereof. In the general formula [1], R
1
represents hydrogen or the like; R
2
represents hydrogen or the like; R
3
and R
4
are the same or different and represent hydrogen, alkyl, alkoxy or halogen; R
5
is combined with R
6
to represent alkylene or represents hydrogen, hydroxy, alkyl, phenyl or alkoxy; R
6
represents alkyl, cycloalkyl, phenyl, a 5- to 10-membered aromatic heterocyclic group containing one to three heteroatoms selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, or —N(R
6-1
)(R
6-2
).
本发明涉及一种新型喹唑啉衍生物,具有较少的皮肤刺激和优异的强烈抑制搔抓行为的作用,以及含有喹唑啉衍生物作为活性成分的药物组合物。本发明涉及由通式[1]表示的喹唑啉衍生物或其药学上可接受的盐。在通式[1]中,R1表示氢或类似物;R2表示氢或类似物;R3和R4相同或不同,表示氢、烷基、烷氧基或卤素;R5与R6结合表示烷基或表示氢、羟基、烷基、苯基或烷氧基;R6表示烷基、环烷基、苯基、含有从一到三个异原子中的一种或几种(所述异原子选自氮原子、氧原子和硫原子)的5-至10-成员芳香杂环基,或—N(R6-1)(R6-2)。