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1.
公开(公告)号:US4540817A
公开(公告)日:1985-09-10
申请号:US516438
申请日:1983-07-25
IPC分类号: C07B61/00 , B01J23/00 , B01J23/70 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/24 , C07C233/43 , C07C102/00
CPC分类号: C07C231/12
摘要: A process for the preparation of 5-amino-2,4-dimethylacetanilide by reduction of 5-nitro-2,4-dimethylacetanilide with hydrogen is disclosed characterized in that a crude mixture containing 5-nitro-2,4-dimethylacetanilide in admixture with at least one of its position isomers is hydrogenated in a water-miscible organic solvent which optionally contains water. The 5-amino-2,4-dimethylacetanilide is separated off from the reaction mixture by means of crystallization employing a mixture of water-miscible organic solvent and water.
摘要翻译: 公开了通过用氢还原5-硝基-2,4-二甲基乙酰苯胺制备5-氨基-2,4-二甲基乙酰苯胺的方法,其特征在于将含有5-硝基-2,4-二甲基乙酰苯胺的粗混合物与 其至少一种位置异构体在任选含有水的水混溶性有机溶剂中氢化。 通过使用水混溶性有机溶剂和水的混合物的结晶从反应混合物中分离出5-氨基-2,4-二甲基乙酰苯胺。