Novel semi-synthetic nocathiacin antibiotics: synthesis and antibacterial activity of bis- and mono-O-alkylated derivatives
作者:Alicia Regueiro-Ren、B.Narasimhulu Naidu、Xiaofan Zheng、Thomas W. Hudyma、Timothy P. Connolly、John D. Matiskella、Yunhui Zhang、Oak K. Kim、Margaret E. Sorenson、Michael Pucci、Junius Clark、Joanne J. Bronson、Yasutsugu Ueda
DOI:10.1016/j.bmcl.2003.09.061
日期:2004.1
rotection strategy was developed for the preparation of mono-O-alkyl hydroxypyridine analogues 5a,b. Most of the bis- and mono-O-alkyl nocathiacins maintained good in vitro activity but showed reduced in vivo efficacy when compared with the natural product. The excellent in vivo activity and improved water solubility of phosphate analogues 3m and 4g suggest their use as potential pro-drugs.
Cobalt(III) Polyamine Complexes as Catalysts for the Hydrolysis of Phosphate Esters and of DNA. A Measurable 10 Million-Fold Rate Increase<sup>1</sup>
作者:Ronald Hettich、Hans-Jörg Schneider
DOI:10.1021/ja964319o
日期:1997.6.1
leads to substantially enhanced cleavage of plasmid DNA. Increasing the number of the charged side groups and/or their distance to the metal ion center provides for better binding to the DNA groove, as shown also by affinity measurements with calf-thymus DNA. In line with this, saturation kinetics of plasmid DNA cleavage yield a corresponding increase of efficiency in Michaelis−Menten-type KM values, with
据报道,钴 (III) 与八种不同的 1,4,7,10-四氮杂环十二烷 (cyclen) 以及两种三 (3-氨基丙基) 胺 (trpn) 衍生物之间的配合物在其侧链中具有不同数量和结构的全烷基铵基团。配体。额外正电荷的存在对硝基苯基和双(硝基苯基)磷酸酯的水解速率影响很小,但会显着增强质粒 DNA 的裂解。增加带电侧基的数量和/或它们与金属离子中心的距离可以更好地与 DNA 凹槽结合,如小牛胸腺 DNA 的亲和力测量所示。与此一致,质粒 DNA 切割的饱和动力学导致 Michaelis-Menten 型 KM 值的效率相应增加,kcat 参数相当恒定。
MATERIALS FOR USE IN AN AQUEOUS ORGANIC REDOX FLOW BATTERY
申请人:Liu Tianbiao
公开号:US20180072669A1
公开(公告)日:2018-03-15
Described herein are aqueous organic redox flow batteries that include a first redox active material that can include a metallocene or a salt thereof, and a second redox active material that can include a viologen or a salt thereof. The aqueous organic redox flow batteries may further include a first aqueous electrolyte, a second aqueous electrolyte, and a separator between the first and second aqueous electrolytes. In addition, disclosed herein are methods of making the metallocene and viologen compounds.
APPLICATIONS OF LOW-COST, THERMAL AND ELECTROCHEMICALLY STABLE ORGANIC COMPOUNDS AS HIGH PERFORMANCE REDOX ACTIVE MATERIALS IN REDOX FLOW BATTERIES
申请人:Liu Tianbiao
公开号:US20200168910A1
公开(公告)日:2020-05-28
Described herein are redox active materials based on functionalization of 2,5-di(pyridine-4-yl)thiazolo-[5,4-d]thiazole (Py
2
TTz). Also described herein are aqueous organic redox flow batteries that include a first redox active material and a second redox active material comprising a viologen compound or a salt thereof.