کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
184627 459579 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical synthesis of N1,N4-diphenyl-2-(phenylsulfonyl)benzene-1,4-diamine derivatives: Introducing an example of ECDispCMich mechanism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical synthesis of N1,N4-diphenyl-2-(phenylsulfonyl)benzene-1,4-diamine derivatives: Introducing an example of ECDispCMich mechanism
چکیده انگلیسی


• Electrochemical oxidation of N,N'-dipheny-l,4-phenylenediamine (DPD).
• Study on disproportionation reaction of radical cation (DPD.+).
• Electrochemical synthesis of N-(4-(phenylimino) cyclohexa-2,5-dienylidene) benzenamine.
• Mechanistic study of electrochemical oxidation of N,N'-dipheny-l,4-phenylenediamine in the absence and presence of arylsulfinic acids.

The electrochemical oxidation of N,N'-diphenyl-l,4-phenylenediamine (DPD) has been studied using cyclic voltammetry and controlled potential coulometry methods. The results revealed that DPD shows two one-electron oxidation–reduction peaks. In the first step DPD via a single-electron process is converted to the related radical cation (DPD.+) and second step is conversion of DPD.+ to N-(4-(phenylimino) cyclohexa-2,5-dienylidene) benzenamine (CHD) via a one-electron/two-protons process. Our results also show that DPD.+ participates in disproportionation reaction and is converted to DPD and CHD. The rate of this reaction is pH dependent and increases with increasing pH. Furthermore, the electrochemical oxidation of DPD has been studied in the presence of arylsulfinic acids as nucleophiles. The results showed that electrochemically generated CHD participates in Michael addition reaction with arylsulfinic acids via a novel “ECDispCMich” mechanism and is converted to the N1,N4-diphenyl-2-(phenylsulfonyl)benzene-1,4-diamine derivatives. In this work, a facile and green electrochemical method for the synthesis of some new N1,N4-diphenyl-2-(phenylsulfonyl)benzene-1,4-diamine derivatives in good yields using controlled-potential electrolysis at a carbon electrode is also reported.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 157, 1 March 2015, Pages 166–174
نویسندگان
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