发明授权
US4393218A 2,2,4,5,5-Pentamethyl-3-formyl-.DELTA..sup.3 -pyrroline and the
preparation thereof
失效
2,2,4,5,5-五甲基-3-甲酰基-3β-吡咯啉及其制备方法
- 专利标题: 2,2,4,5,5-Pentamethyl-3-formyl-.DELTA..sup.3 -pyrroline and the preparation thereof
- 专利标题(中): 2,2,4,5,5-五甲基-3-甲酰基-3β-吡咯啉及其制备方法
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申请号: US327753申请日: 1981-12-07
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公开(公告)号: US4393218A公开(公告)日: 1983-07-12
- 发明人: Silvestro Costanzi , Francesco Tessarolo , Maurizio Brunelli
- 申请人: Silvestro Costanzi , Francesco Tessarolo , Maurizio Brunelli
- 申请人地址: ITX Palermo
- 专利权人: Anic, S.p.A.
- 当前专利权人: Anic, S.p.A.
- 当前专利权人地址: ITX Palermo
- 优先权: ITX23080A/79 19790529
- 主分类号: C07D207/22
- IPC分类号: C07D207/22 ; C07D207/08 ; C07D207/20 ; C07D207/24
摘要:
A process for preparing 2,2-dialkyl-4-methyl-5,5-dialkyl-3-formyl-.DELTA..sup.3 -pyrrolines by reacting the corresponding dialkyl substituted di-tert-propargylamines with water at a pH equal to or less than 3.0. Preferably, an inorganic mercury compound is used as a catalyst.
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