Novel Process for Producing Ramosetron or Its Salt
申请人:Inakoshi Masatoshi
公开号:US20090069570A1
公开(公告)日:2009-03-12
[Problems] To provide a novel process for producing ramosetron or its salt that is useful as a pharmaceutical, especially as a therapeutic and/or preventive agent for digestive symptoms caused by administration of an anti-malignant tumor agent, diarrheal-type irritable bowel syndrome, diarrheal symptoms of irritable bowel syndrome, etc.
[Means for Resolution] Ramosetron or its salt can be produced by reacting a compound of the formula (I):
[wherein X is a halogen] or a salt thereof with 1-methyl-1H-indole in the presence of a Lewis acid selected from the group consisting of a lower alkylaluminum dihalide, a di-lower alkylaluminum halide, a tri-lower alkylaluminum and a lower alkylaluminum sesquihalide.
To provide a novel process for producing ramosetron or its salt that is useful as a pharmaceutical, especially as a therapeutic and/or preventive agent for digestive symptoms caused by administration of an anti-malignant tumor agent, diarrheal-type irritable bowel syndrome, diarrheal symptoms of irritable bowel syndrome, etc.
Ramosetron or its salt can be produced by reacting a compound of the formula (I):
[wherein X is a halogen] or a salt thereof with 1-methyl-1H-indole in the presence of a Lewis acid selected from the group consisting of a lower alkylaluminum dihalide, a di-lower alkylaluminum halide, a tri-lower alkylaluminum and a lower alkylaluminum sesquihalide.
NOVEL PROCESS FOR PRODUCING RAMOSETRON OR ITS SALT
申请人:Astellas Pharma Inc.
公开号:EP1870408A1
公开(公告)日:2007-12-26
[Problems] To provide a novel process for producing ramosetron or its salt that is useful as a pharmaceutical, especially as a therapeutic and/or preventive agent for digestive symptoms caused by administration of an anti-malignant tumor agent, diarrheal-type irritable bowel syndrome, diarrheal symptoms of irritable bowel syndrome, etc.
[Means for Resolution] Ramosetron or its salt can be produced by reacting a compound of the formula (I):
[wherein X is a halogen] or a salt thereof with 1-methyl-1H-indole in the presence of a Lewis acid selected from the group consisting of a lower alkylaluminum dihalide, a di-lower alkylaluminum halide, a tri-lower alkylaluminum and a lower alkylaluminum sesquihalide.
[问题] 提供一种生产雷莫司琼或其盐的新工艺,该工艺可用作药物,特别是用作治疗和/或 预防因服用抗恶性肿瘤药物引起的消化道症状、腹泻型肠易激综合征、肠易激综合征的腹泻 症状等的药物。
[解决方法] 雷莫司琼或其盐可以通过式(I)化合物反应制得:
[其中 X 为卤素]或其盐与 1-甲基-1H-吲哚在选自低烷基铝二卤化物、二低烷基铝卤化物、三低烷基铝和低烷基铝倍半卤化物组成的路易斯酸组中的存在下反应。