14163-00-9Relevant articles and documents
Electrocatalytic Biosynthesis using a Bucky Paper Functionalized by [Cp*Rh(bpy)Cl]+ and a Renewable Enzymatic Layer
Zhang, Lin,Etienne, Mathieu,Vilà, Neus,Le, Thi Xuan Huong,Kohring, Gert-Wieland,Walcarius, Alain
, p. 4067 - 4073 (2018)
A bioelectrode for electroenzymatic synthesis was prepared, combining a layer for NADH regeneration and a renewable layer for enzymatic substrate reduction. The covalent immobilization of a rhodium complex mediator ([Cp*Rh(bpy)Cl]+) on the surface of a bucky paper electrode was achieved by following an original protocol in two steps. A bipyridine ligand was first grafted on the electrode by electro-reduction of bipyridyl diazonium cations generated from 4-amino-2,2′-bipyridine, and the complex was then formed by reaction with [RhCp*Cl2]2. A turnover frequency of 1.3 s?1 was estimated for the electrocatalytic regeneration of NADH by this immobilized complex, with a Faraday efficiency of 83 %. The bucky paper electrode was then overcoated by a bio-doped porous layer made of glassy fibers with immobilized D-sorbitol dehydrogenase. This assembly allowed for the efficient separation of the enzyme and the rhodium catalyst, which is a prerequisite for effective bioelectrocatalysis with such bioelectrochemical system, while allowing effective mass transport of NAD+/NADH cofactor from one layer to the other. Thereby, it was possible to reuse the same mediator-functionalized bucky paper with three different enzyme layers. The bioelectrode was applied to the electroenzymatic reduction of D-fructose to D-sorbitol. A turnover frequency of 0.19 s?1 for the rhodium complex was observed in the presence of 3 mM D-fructose and a total turnover number higher than 12000 was estimated.
Process development of a potent neuroprotector agent: Collismycin A
Lopez-Ogalla, Javier,Saiz, Gonzalo,Palomo, Francisco E.
, p. 120 - 126 (2013)
An efficient synthetic process for the natural product of marine origin, collismycin type A, a potent neuroprotector agent, has been developed. This new synthetic route avoids chromatographic steps, implies an improvement cost, and provides easy access to large scale.
Recyclable Transition Metal Catalysis using Bipyridine-Functionalized SBA-15 by Co-condensation of Methallylsilane with TEOS
Han, Ye Ri,Kim, Jae Soon,Park, Woo-Jin,Lee, Chang-Hee,Cheon, Jinwoo,Jun, Chul-Ho
, p. 197 - 201 (2021/01/18)
Well-defined recyclable Pd- and Rh-bipyridyl group-impregnated SBA-15 catalysts were prepared for C?C bond coupling reaction and selective hydrogenation reactions, respectively. These SBA-15 derived ligands for the catalysts were prepared by direct and indirect co-condensation method using bipyridyl-linked methallylsilane. This indirect method, involving methoxysilane generated from methallylsilane shows higher loading efficiency of transition metal catalysts on SBA-15 than the direct use of methallylsilane.
Synthesis and characterization of a new ditopic bipyridine-terpyridine bridging ligand using a Suzuki cross-coupling reaction
Zibaseresht, Ramin
, p. 277 - 287 (2020/02/13)
Synthesis of a new bridging ligand 4'-{4-[(2,2'-bipyridin)-4-yl]-phenyl}-2,2':6'-2''-terpyridine (I) was reported. A Suzuki cross-coupling reaction was conducted for the preparation of such ligand in two different routes either between 4'-(4-bromophenyl)-2,2':6'-2''-terpyridine and 2,2'-bipyridyl-4-boronic acid or 4'-(4-boronatophenyl)-2,2':6',2''-terpyridine and 4-bromo-2,2'-bipyridine. Br HO OH B + N N N N N N N HO OH B Br N + N N N (I) N N N N
