发明授权
US5304680A Process for the preparation of aromatic amines which are substituted by
C.sub.1 -C.sub.4 -alkoxy in the p-position
失效
用于制备在对位被C 1 -C 4 - 烷氧基取代的芳族胺的方法
- 专利标题： Process for the preparation of aromatic amines which are substituted by C.sub.1 -C.sub.4 -alkoxy in the p-position
- 专利标题（中）： 用于制备在对位被C 1 -C 4 - 烷氧基取代的芳族胺的方法
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申请号： US728909申请日： 1991-07-10
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公开(公告)号： US5304680A公开(公告)日： 1994-04-19
- 发明人: Heinz Landscheidt , Alexander Klausener , Heinz U. Blank
- 申请人： Heinz Landscheidt , Alexander Klausener , Heinz U. Blank
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX4023056 19900720
- 主分类号： B01J23/40
- IPC分类号： B01J23/40 ; C07B61/00 ; C07C209/36 ; C07C213/00 ; C07C217/84 ; C07C217/94
摘要：
Aromatic amines which are substituted by C.sub.1 -C.sub.4 -alkoxy in the p-position are prepared by catalytic hydrogenation of the underlying aromatic nitro compounds in a reaction medium comprising sulphuric acid and a C.sub.1 -C.sub.4 -alcohol by a Bamberger type rearrangement at elevated temperature, advantageously by carrying out the catalytic hydrogenation under elevated pressure.
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