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Nitration,amination, and halogenation of Di-O-methylphloracetophenone
Authors:John P. Acton  Dorothy J. Donnelly  John A. Donnelly
Affiliation:(1) Chemistry Department, University College, Dublin 4, Ireland
Abstract:Chlorination of the title compound gave 5prime- and 3prime-chloro-2prime-hydroxy-4prime,6prime-dimethoxyacetophenone. The nitration of its acetate, followed successively by reduction, diazotization, and reaction with cuprous chloride, gave the 3prime-substituted series, 2prime-acetoxy-4prime,6prime-dimethoxy-3prime-nitroacetophenone, 3prime-amino-2prime-hydroxy-4prime,6prime-dimethoxyacetophenone, and 3prime-chloro-2prime-hydroxy-4prime,6prime-methoxyacetophenone, respectively. The orientation of substituents in the products was proved. The amino and chloro members of the isomeric 5prime-substituted series were availablevia 2prime-hydroxy-4prime,6prime-dimethoxy-5prime-phenylazoacetophenone, the product of the reaction of the title compound with benzenediazonium chloride.
Nitrierung, Aminierung und Halogenierung von Di-O-methylphloracetophenon
Zusammenfassung Chlorierung der Titelverbindung gab 5prime- und 3prime-Chlor-2prime-hydroxy-4prime,6prime-dimethoxyacetophenon. Die Nitrierung des Acetats, gefolgt von Reduktion, Diazotierung und Reaktion mit CuCl ergab die 3prime-substituierte Reihe: 2prime-Acetoxy-4prime,6prime-dimethoxy-3prime-nitroacetophenon, 3prime-Amino-2prime-hydroxy-4prime,6prime-dimethoxyacetophenon und 3prime-Chlor-2prime-hydroxy-4prime,6prime-dimethoxyacetophenon. Die Orientierung der Substituenten wird diskutiert. Die Amino- und Chlorderivate der isomeren 5prime-substituierten Reihe sind über 2prime-Hydroxy-4prime,6prime-dimethoxy-5prime-phenylacetophenon zugängig, dem Produkt der Reaktion der Titelverbindung mit Phenyldiazoniumchlorid.
Keywords:Acetophenone  Aromatic substitution  Nuclear regioselectivity
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