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
Synthesis and characterization of 5-cyano-6-methyl-2,2'- bipyridine metal-complex dyes
β Scribed by Masaki Matsui; Koichi Matsumoto; Katsuyoshi Shibata; Hiroshige Muramatsu
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 542 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0143-7208
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A new heptapode heptakis-6-(5-methylene-thioureido-5%-methyl-2,2%-bipyridyl)-b-cyclodextrin was prepared and its complexation properties towards metal cations were investigated. Substituting the urea functions by the corresponding thioureas promoted the inversion of the metal coordination selectivit
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