New synthesis of 28- and 30- crown-forma
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Ashraf A. Abbas
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Article
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1998
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Elsevier Science
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French
โ 375 KB
The macrocyclic cyano crown formazans 3a-e and cyano crown formazans with two formazyl moieties 4a-c were prepared by the azo coupling of the appropriate bis diazonittm salts 2a-c with cyanoacetic acid m different meditun. The Bis macrocyclic crown formazan 9 was prepared by condensation of 1.3-diam