Synthesis of the Novel 4,4’- and 6,6’- Dihydroxamic - 2,2’-Bipyridines and Improved Routes to 4,4’- and 6,6’- Substituted 2,2’-Bipyridines and Mono-N-Oxide-2,2’-Bipyridine

The intrinsic redox reactions of polyamic acid derivatives and their application in hydrogen peroxide sensor

“…2f). The formation of N-oxide indicates that the carboxylic acid groups of both polymers could convert to peroxy acids, which then oxidized the polymers at the imine sites, consistent with the results seen in pyridine N-oxide formation [24].…”

“…The chemical synthesis of pyridine N-oxides has been reported previously [24]. In 30% aqueous H 2 O 2 in acetic acid, pyridines are preferentially N-oxidized during the formation of peracetic acid.…”

“…The imine structure on pyridines can be oxidized by 30% aqueous H 2 O 2 in acetic acid to form pyridine N-oxides [24]:…”

Synthesis of new CO2-soluble ruthenium(II) and cobalt(II) polypyridine complexes bearing fluorinated alkyl chains and their application to photoreduction of liq. CO2

“…Four new ligands, F84OPh, F44OPh, F62Ph, and F62O, were prepared from appropriate 2,2 0 -bipyridine derivatives and fluoroalkyl chains, as shown in Scheme 1, according to the literature [5][6][7][8][9][10][11][12][13][14][15]: F84OPh and F44OPh were obtained by coupling between 4,4 0 -bis(p-hydroxyphenyl)-2,2 0 -bipyridine and the corresponding 4-(perfluoroalkyl)butyl tosylates [5][6][7][8][9][11][12][13]15]. F62Ph was prepared by the Suzuki coupling reaction between 4,4 0 -dibromo-2,2 0 -bipyridine and p-(2-(perfluorohexyl)ethyl)phenylboronic acid [8][9][10][11][12]16,17].…”

“…F62Ph was prepared by the Suzuki coupling reaction between 4,4 0 -dibromo-2,2 0 -bipyridine and p-(2-(perfluorohexyl)ethyl)phenylboronic acid [8][9][10][11][12]16,17]. On the other hand, F62O was synthesized by the substitution reaction between 4,4 0 -dinitro-2,2 0 -bipyridine-1,1 0 -dioxide and potassium 2-(perfluorohexyl)ethoxide followed by subsequent deoxygenation with PBr 3 (Scheme 1) [8][9][10][11][12][13].…”