Synthetic approaches toward macrocyclic sulfonyl crown formazans

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

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 389 KB
• Volume: 7
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/(sici)1098-1071(199605)7:3<215::aid-hc10>3.0.co;2-u

✦ Synopsis

Coupling of diazonium salts with ethyl sulfonylpyruvates 1-3 or arenesulfonylacetic acids 14,15 afforded good yields of the corresponding 1,5-symmetrically disubstituted-3-sulfonylformazans 4-1 1. The new sulfonyl macrocyclic crown formazans 25-32 were prepared by coupling of the appropriate bisdiazonium salts 22-24 with compounds 1-3 or 14,l.S.