CHEMICAL REGENERATION METHOD OF OXIDIZED COENZYME NAD (P)+
申请人:NANJING TECH UNIVERSITY (CN)
公开号:US20170114085A1
公开(公告)日:2017-04-27
It discloses a chemical regeneration method of oxidized coenzyme NAD(P)
+
which is under an oxygen or air atmosphere condition, adding a catalytic amount of bridged flavin, and oxidizing NAD(P)H to obtain NAD(P)
+
. The catalyst for regeneration of cofactor is cheap and easily available small organic molecule having no noble metal; this regeneration system can regenerate NADH and NADPH; this regeneration system has a wide pH range and temperature range, being applicable to various oxidation reactions catalyzed by nicotinamide-dependent oxidoreductase.
Modelling flavoenzymatic charge transfer events: development of catalytic indole deuteration strategies
作者:Alexander T. Murray、Jonathan D. Challinor、Christina E. Gulácsy、Cristina Lujan、Lauren E. Hatcher、Christopher R. Pudney、Paul R. Raithby、Matthew P. John、David R. Carbery
DOI:10.1039/c6ob00361c
日期:——
The formation and chemistry of flavin–indole charge transfer (CT) complexes has been studied using a model cationic flavin. The ability to form a CT complex is sensitive to indole structure as gauged by spectroscopic, kinetics and crystallographic studies. Single crystals of sufficient quality of a flavin–indole CT complex, suitable for X-ray diffraction, have been grown, allowing solid-state structural
Reaction of amines with N1,N10-ethylene-bridged flavinium salts: the first NMR spectroscopic evidence of C10a tetrahedral amine adducts
作者:Wen-Shan Li、Lawrence M Sayre
DOI:10.1016/s0040-4020(01)00314-3
日期:2001.5
Two different 13C-labeled 7-trifluoromethyl-N1,N10-ethyleneisoalloxazinium chlorides were utilized to examine the mechanism of amine dehydrogenation. 1H NMR studies in CD3CN (13C NMR in DMSO-d6), as confirmed using 15N-labeled benzylamine, indicate that primary and secondary amines add to give tetrahedral C10a adducts that persist for hours at 25°C. Upon heating, the C10a amine adducts partition between
两种不同的13 C标记的7-三氟甲基-N 1,N 10-亚乙基异恶二嗪氯化物被用来检验胺脱氢的机理。如使用15 N标记的苄胺所证实的,CD 3 CN中的1 H NMR研究(DMSO-d 6中的13 C NMR )表明,伯胺和仲胺加成后,得到四面体C 10a加合物,该加合物在25°C持续数小时。加热后,C 10a胺加合物在重排至C 4a之间分配螺乙内酰脲in,如果是苄基胺,则β-消除,得到减少的黄素和亚胺脱氢产物。当存在水时,在碱性条件下生成的AC 10a四面体羟基加合物也通过1 H / 13 C NMR证实。
Chemoselective sulfide oxidation mediated by bridged flavinium organocatalysts
作者:Barrie J. Marsh、David R. Carbery
DOI:10.1016/j.tetlet.2010.02.164
日期:2010.4
The chemoselective oxidation of sulfides to sulfoxides, catalysed by bridged, tetracyclic flavinium catalysts is presented. The flavinium catalysts are easily prepared via a telescoped three-step process. A range of sulfoxides is accessed in excellent yield and chemoselectivity. (C) 2010 Elsevier Ltd. All rights reserved.
N1,N10-Ethylene-bridged high-potential flavins: synthesis, characterization, and reactivity
作者:Wen-Shan Li、Nanjing Zhang、Lawrence M Sayre
DOI:10.1016/s0040-4020(01)00313-1
日期:2001.5
N-1,N-10-Ethyleneisoalloxazinium chloride and its 8-Cl-, 7-CF3-, and 3-CH3-7-CF3-substituted analogs were synthesized for the purpose of exhibiting thermal reactivity with organic substrates. The new flavins were characterized spectroscopically and electrochemically, and were found to react with amines, thiols, and phenylhydrazine, the latter case exhibiting catalytic aerobic recycling. Reactions of aliphatic benzylic and cyclopropyl amines with the 7-CF3 analog were also compared to their oxidations by tris(phenanthroline)iron(III). All reactions of the flavinium salts appear to occur through heterolytic rather than homolytic mechanisms. (C) 2001 Elsevier Science Ltd. All rights reserved.