New synthesis of macrocyclic crown-formazans from pyruvic acid derivatives

✍ Scribed by Yehia A. Ibrahim; Ahmed H.M. Elwahy; Ashraf A. Abbas

• Publisher: Elsevier Science
• Year: 1994
• Tongue: French
• Weight: 704 KB
• Volume: 50
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(01)89286-3

✦ Synopsis

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The macmcyclic crown-formamas 7ac. 121-g were prepared by the azc coupling of the appropriate bisdiazoaium salts 4a-c with pyruvic acid and a&ruvic acids 8~. The ready accessability of the latters e&m an easy access towards l,$-symnWically disubstihW4i-3-arylformazam e.g. 1Oa-g as well as their macmcyclic crown derivatives of expected valuable applications.