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公开(公告)号:US4965400A
公开(公告)日:1990-10-23
申请号:US226260
申请日:1988-08-02
申请人: Richard Vicari , Mohammad Aslam , Wilson B. Ray , Kenneth G. Davenport , Ralph Dammel , Juergen Lingnau , Karl-Friedrich Doessel
发明人: Richard Vicari , Mohammad Aslam , Wilson B. Ray , Kenneth G. Davenport , Ralph Dammel , Juergen Lingnau , Karl-Friedrich Doessel
IPC分类号: C07C43/23 , B01J23/44 , B01J27/12 , B01J27/125 , C07B61/00 , C07C27/00 , C07C39/373 , C07C41/00 , C07C45/54 , C07C45/63 , C07C49/825 , C07C67/00 , C07C67/08 , C07C67/297 , C07C67/34 , C07C67/347 , C07C67/62 , C07C69/157 , C07C209/00 , C07C213/00 , C07C219/34 , C08F12/00 , C08F12/14 , G03F7/038
CPC分类号: G03F7/038 , C07C39/373 , C07C45/54 , C07C45/63 , C07C49/825
摘要: 3-substituted-4-hydroxy- and 4-acetoxystyrene compounds, especially 3,5-di(methyl, bromo or chloro)-4-acetoxystyrene as well as a process for its preparation. 2,6-dimethylphenol is acylated with acetic anhydride and HF catalyzed to produce 3,5-dimethyl-4-hydroxy-acetophenone. After subsequent esterification with acetic anhydride and catalyzed hydrogenation to form 1-(3',5'-dimethyl-4'-acetoxyphenyl)ethanol, this intermediate is then dehydrated with an acid and a polymerization inhibitor to produce 3,5-dimethyl-4-acetoxystyrene.
摘要翻译: 3-取代-4-羟基 - 和4-乙酰氧基苯乙烯化合物,特别是3,5-二(甲基,溴或氯)-4-乙酰氧基苯乙烯以及其制备方法。 2,6-二甲基苯酚用乙酸酐进行酰化,HF催化反应生成3,5-二甲基-4-羟基苯乙酮。 在用乙酸酐进行酯化和催化氢化后,形成1-(3',5'-二甲基-4'-乙酰氧基苯基)乙醇,然后将该中间体用酸和阻聚剂脱水,生成3,5-二甲基-4 乙酰氧基苯乙烯
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2.
公开(公告)号:US5072025A
公开(公告)日:1991-12-10
申请号:US559759
申请日:1990-07-26
申请人: Richard Vicari , Mohammad Aslam , Wilson B. Ray , Kenneth G. Davenport , Ralph Dammel , Juergen Lingnau , Karl-Friedrich Doessel
发明人: Richard Vicari , Mohammad Aslam , Wilson B. Ray , Kenneth G. Davenport , Ralph Dammel , Juergen Lingnau , Karl-Friedrich Doessel
IPC分类号: C07C39/373 , C07C45/54 , C07C45/63 , C07C49/825 , G03F7/038
CPC分类号: G03F7/038 , C07C39/373 , C07C45/54 , C07C45/63 , C07C49/825
摘要: 3-substituted-4-hydroxy- and 4-acetoxystyrene compounds, especially 3,5-di(methyl, bromo or chloro)-4-acetoxystyrene as well as a process for its preparation. 2,6-dimethylphenol is acylated with acetic anhydride and HF catalyzed to produce 3,5-dimethyl-4-hydroxy-acetophenone. After subsequent esterification with acetic anhydride and catalyzed hydrogenation to form 1-(3',5'-dimethyl-4'-acetoxyphenyl)ethanol, this intermediate is then dehydrated with an acid and a polymerization inhibitor to produce 3,5-dimethyl-4-acetoxystyrene.
摘要翻译: 3-取代-4-羟基 - 和4-乙酰氧基苯乙烯化合物,特别是3,5-二(甲基,溴或氯)-4-乙酰氧基苯乙烯以及其制备方法。 2,6-二甲基苯酚用乙酸酐进行酰化,HF催化反应生成3,5-二甲基-4-羟基苯乙酮。 在用乙酸酐进行酯化和催化氢化后,形成1-(3',5'-二甲基-4'-乙酰氧基苯基)乙醇,然后将该中间体用酸和阻聚剂脱水,得到3,5-二甲基-4 乙酰氧基苯乙烯
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公开(公告)号:US4994623A
公开(公告)日:1991-02-19
申请号:US500112
申请日:1990-03-27
IPC分类号: C07C319/20 , C07C323/22
CPC分类号: C07C319/20 , C07C323/22
摘要: Thiophenones are produced by acylating the aromatic ring of thiophenolic ethers in the presence of anhydrous hydrofluoric acid. It has been found that if the thio group is in the form of a thioether and not a thiol, the aromatic ring can be acylated to form the thiophenone in the presence of anhydrous hydrofluoric acid.
摘要翻译: 通过在无水氢氟酸存在下酰化硫代酚醚的芳环来制备噻吩酮。 已经发现,如果硫基是硫醚而不是硫醇的形式,则芳族环可以在无水氢氟酸的存在下酰化形成噻吩酮。
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4.
公开(公告)号:US4927956A
公开(公告)日:1990-05-22
申请号:US360803
申请日:1989-06-02
申请人: Richard Vicari , Mohammad Aslam , Wilson B. Ray , Kenneth G. Davenport , Ralph Dammel , Juergen Lingnau , Karl-Friedrich Doessel
发明人: Richard Vicari , Mohammad Aslam , Wilson B. Ray , Kenneth G. Davenport , Ralph Dammel , Juergen Lingnau , Karl-Friedrich Doessel
IPC分类号: C07C39/373 , C07C45/54 , C07C45/63 , C07C49/825 , C07C69/157 , G03F7/038
CPC分类号: G03F7/038 , C07C39/373 , C07C45/54 , C07C45/63 , C07C49/825
摘要: 3-substituted-4-hydroxy- and 4-acetoxystyrene compounds, especially 3,5-di(methyl, bromo or chloro)-4-acetoxystyrene as well as a process for its preparation. 2,6-dimethylphenol is acylated with acetic anhydride and HF catalyzed to produce 3,5-dimethyl-4-hydroxy-acetophenone. After subsequent esterification with acetic anhydride and catalyzed hydrogenation to form 1-(3',5'-dimethyl-4'-acetoxyphenyl)ethanol, this intermediate is then dehydrated with an acid and a polymerization inhibitor to produce 3,5-dimethyl-4-acetoxystyrene.
摘要翻译: 3-取代-4-羟基 - 和4-乙酰氧基苯乙烯化合物,特别是3,5-二(甲基,溴或氯)-4-乙酰氧基苯乙烯以及其制备方法。 2,6-二甲基苯酚用乙酸酐进行酰化,HF催化反应生成3,5-二甲基-4-羟基苯乙酮。 在用乙酸酐进行酯化和催化氢化后,形成1-(3',5'-二甲基-4'-乙酰氧基苯基)乙醇,然后将该中间体用酸和阻聚剂脱水,得到3,5-二甲基-4 乙酰氧基苯乙烯
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公开(公告)号:US5041666A
公开(公告)日:1991-08-20
申请号:US82265
申请日:1987-08-06
IPC分类号: C07C211/50
CPC分类号: C07C211/50
摘要: A method is provided for the production of 3,3', 4,4'-tetraaminobiphenyl (TAB) from biphenyl comprising the following steps:1) acetylating the biphenyl in the presence of an appropriate Friedel-Crafts catalyst to obtain 4,4'-diacetylbiphenyl (DAcB);2) oximating the DAcB to form DAcB dioxime;3) subjecting the dioxime to a double Beckmann rearrangement to obtain N,N-diacetylbenzidine (DiAcBz);4) nitrating the DiAcBz to obtain 3,3'-dinitro-N,N-diacetylbenzidine (DNAcBz)5) removing the acetyl groups of the DNAcBz by basic hydrolysis to form 3,3'-dinitrobenzidine (DNB); and6) reducing the nitrate groups of the DNB to form TAB.
摘要翻译: 提供从联苯制备3,3 + 40,4,4'-四氨基联苯(TAB)的方法,包括以下步骤:1)在合适的Friedel-Crafts催化剂存在下使联苯乙酰化得到4,4 ' - 乙酰基联苯(DAcB); 2)使DAcB肟化形成DAcB二肟; 3)使二肟双重Beckmann重排,得到N,N-二乙酰基联苯胺(DiAcBz); 4)硝化DiAcBz得到3,3'-二硝基-N,N-二乙酰基联苯胺(DNAcBz)5)通过碱水解除去DNAcBz的乙酰基,形成3,3'-二硝基联苯胺(DNB); 和6)减少DNB的硝酸盐基团形成TAB。
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