发明公开
EP0197408A2 A method of preparing omega -lactams, in particular caprolactam
失效
维他命Zur Herstellung von omega-Lactamen，insbesondere己内酰胺。
- 专利标题： A method of preparing omega -lactams, in particular caprolactam
- 专利标题（中）： 维他命Zur Herstellung von omega-Lactamen，insbesondere己内酰胺。
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申请号： EP86103982.4申请日： 1986-03-22
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公开(公告)号： EP0197408A2公开(公告)日： 1986-10-15
- 发明人: Senni, Paolo , Zuliani, Leandro , Ferruzzi, Sergio
- 申请人： CHIMICA DEL FRIULI S.p.A.
- 申请人地址： Piazzale F. Marinotti 1 I-33050 Torviscosa (Udine) IT
- 专利权人： CHIMICA DEL FRIULI S.p.A.
- 当前专利权人： CHIMICA DEL FRIULI S.p.A.
- 当前专利权人地址： Piazzale F. Marinotti 1 I-33050 Torviscosa (Udine) IT
- 代理机构： Garrone, Fernando
- 优先权： IT2008985 19850327
- 主分类号： C07D201/10
- IPC分类号： C07D201/10
摘要：
A method of preparing ω -lactams, in particular caprolactam, comprising: a step of premixing cycloaliphatic acids having the formula
where n = 3 - 13, with a dehydrating agent; the first step of reaction with a nitrosating agent; the second step of reaction with the addition of a very small amount of water corresponding to a molar ratio U = H 2 O/SO 3 within the 0.1 to 0.9 range; and the step of reclaiming the unreacted cycloaliphatic acid. The method affords improved output from the lactamization reaction and reduced byproducts.
where n = 3 - 13, with a dehydrating agent; the first step of reaction with a nitrosating agent; the second step of reaction with the addition of a very small amount of water corresponding to a molar ratio U = H 2 O/SO 3 within the 0.1 to 0.9 range; and the step of reclaiming the unreacted cycloaliphatic acid. The method affords improved output from the lactamization reaction and reduced byproducts.
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