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Synthesis of (E)-diethyl 6,6′-(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates), a new type of 2,2′-azopyridine dyes

✍ Scribed by Daniel Botelho da Silva; Abdelouahid Samadi; Lourdes Infantes; María do Carmo Carreiras; José Marco-Contelles


Publisher
Elsevier Science
Year
2010
Tongue
French
Weight
622 KB
Volume
51
Category
Article
ISSN
0040-4039

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✦ Synopsis


An unexpected, but simple method for the efficient synthesis of new 2.2 0 -azopyridine dyes, such as (E)diethyl 6,6 0 -(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates) (2, 4, 6, 8, 10, and 12), based on the treatment of ethyl 6-amino-5-cyano-2-methyl-4-arylnicotinates (1, 3, 5, 7, 9, and 11) with NBS/ benzoyl peroxide, is described. The X-ray diffraction analysis and the UV-vis absorption spectra of dye 2 are reported and discussed.


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