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    • 40. 发明授权
    • Method for the preparation of phenols
    • 苯酚的制备方法
    • US09527789B2
    • 2016-12-27
    • US14907671
    • 2014-07-25
    • WEYLCHEM FRANKFURT GMBH
    • Klaus ForstingerReinhard SchwesingerAndreas Maier
    • C07C37/00C07C37/045C07C51/367C07C51/00
    • C07C37/00C07C37/045C07C51/00C07C51/367C07C39/28C07C39/07C07C65/10
    • The present invention relates to a method for the preparation of phenols, in which an aryldiazonium salt, which is prepared by the diazotisation of a corresponding aromatic, primary amine, is decomposed by heating in a mixture containing hot water, a mineral acid and an organic solvent, wherein the organic solvent contains a ketone of formula (I) R1C(O)R2 in which R1 and R2 independently stand for (C1-C5)-alkyl and R1 and R2 together have at least four carbon atoms, wherein the aromatic primary amine is aniline or a substituted aniline, which contains at least one further substituent which is selected from: alkyl, alkenyl, alkynyl, halogen, haloalkyl, cycloalkyl, heteroaryl, carboxyl, cyan, alkoxyl and ester, and wherein substantially no copper salts are contained in the mixture.
    • 本发明涉及一种制备苯酚的方法,其中通过相应的芳族伯胺的重氮化制备的芳基重氮盐通过在含有热水,无机酸和有机物的混合物中加热而分解 溶剂,其中有机溶剂含有式(I)R 1 C(O)R 2的酮,其中R 1和R 2独立地代表(C 1 -C 5) - 烷基,R 1和R 2一起具有至少4个碳原子,其中芳族伯 胺是苯胺或取代的苯胺,其含有至少一个选自烷基,烯基,炔基,卤素,卤代烷基,环烷基,杂芳基,羧基,氰基,烷氧基和酯的另外的取代基,其中基本上不含铜盐 在混合物中。