19355-10-3Relevant academic research and scientific papers
Hydride Reduction of NAD(P)+ Model Compounds with a Ru(II)-Hydrido Complex
Koga, Kichitaro,Matsubara, Yasuo,Kosaka, Tatsumi,Koike, Kazuhide,Morimoto, Tatsuki,Ishitani, Osamu
, p. 5530 - 5539 (2015)
In order to better understand the regioselective hydride transfer of metal hydrido complexes to NAD(P)+ model compounds, reactions of [Ru(tpy)(bpy)H]+ (Ru-H: tpy = 2,2′:6″,2″-terpyridine, bpy = 2,2′-bipyridine) with various substitue
Dithionite adducts of pyridinium salts: Regioselectivity of formation and mechanisms of decomposition
Carelli, Vincenzo,Liberatore, Felice,Scipione, Luigi,Di Rienzo, Barbara,Tortorella, Silvano
, p. 10331 - 10337 (2007/10/03)
1H and 13C NMR spectroscopy has been used to detect and to characterize the adducts formed, in alkaline solutions, by the attack of dithionite anion on 3-carbamoyl or 3-cyano substituted pyridinium salts. In all studied cases, only 1,4-dihydropyridine-4-sulfinates, formed by attack of dithionite oxyanion on the carbon 4 of pyridinium ring, were found. This absolute regioselectivity seems to suggest a very specific interaction between the pyridinium cation and the dithionite through the formation of a rigidly oriented ion pair, determining the position of attack. In weak alkaline solution, the adducts decompose according to two mechanisms SNi and SNi′: the SNi path is operative in all studied cases and preserves the 1,4-dihydro structure yielding the corresponding 1,4-dihydropyridines, whereas the SNi′ path involves the shift of 2,3 or 5,6 double bonds yielding 1,2- or 1,6-dihydropyridines, respectively. The formation of 1,2- or 1,6-dihydropyridines, in addition to 1,4-dihydro isomers, depends on their respective thermodynamic stabilities.
Thermodynamic characteristics of NADH/NAD+ analogues in acetonitrile: 2-methyl, 4-methyl and 2,4-dimethyl 1-benzyl-dihydronicotinamides and the corresponding pyridinium species
Anne,Moiroux
, p. 531 - 538 (2007/10/02)
Procedures were elaborated for the syntheses of the title compounds. The thermodynamic changes brought about by each methyl substitution were then determined quantitatively. In acetonitrile, the respective one-electron oxidation and one-electron reduction
Mechanisms of Reductive Methylation of NAD+ Analogues by a trans-Dimethylcobalt(III) Complex
Fukuzumi, Shunichi,Kitano, Toshiaki
, p. 41 - 45 (2007/10/02)
Various NAD+ analogues are readily reduced by a trans-dimethylcobalt(III) complex, trans- (L = 11-hydroxy-2,3,9,10-tetramethyl-1,4,8,11-tetraazaundeca-1,3,8,10-tetraene-1-olate), to yield the corresponding methylated NADH analogues, while cis-dialkyl- or monoalkylcobalt(III) complexes show no reactivity towards NAD+ analogues.The charge distribution of NAD+ analogues, as well as the thermodynamic stability of the products, is shown to be an important factor in determining the isomer distribution of the methylated products.The observed second-orderrate constants for the reduction of NAD+ analogues by trans- in acetonitrile at 298 K are much larger than those estimated for outer-sphere electron transfer from trans- to NAD+ analogues.
Reductive Methylation of NAD+ Analogues by a trans-Dimethylcobalt(III) Complex
Fukuzumi, Shunichi,Kitano. Toshiaki,Ishikawa, Kunio,Tanaka, Toshio
, p. 1599 - 1602 (2007/10/02)
Various NAD+ analogues are readily reduced by a trans-dimethylcobalt(III) complex to yield the corresponding methylated NADH analogues, while cis-dialkyl- or monoalkylcobalt(III) complexes cannot reduce the NAD+ analogues at all.
