Complexes of cyclic polyaza chelators with cations of alkaline earth metals for enhanced biological activity
申请人:Winchell S. Harry
公开号:US20050112066A1
公开(公告)日:2005-05-26
Cyclic polyaza chelators that possess high affinity and specificity for first transition series metal cations exhibit an unanticipated improvement in biological activity when administered as complexes with cations of the alkaline earth metals, Ca(II) and Mg(II), most notably Ca(II). By virtue of this improvement, these complexes are particularly effective in the treatment of pathological conditions, including ischemia and ischemia-reperfusion injury.
A new dinuclear chiral salen complexes for asymmetric ring opening and closing reactions: Synthesis of valuable chiral intermediates
作者:Santosh Singh Thakur、Shu-Wei Chen、Wenji Li、Chang-Kyo Shin、Seong-Jin Kim、Yoon-Mo Koo、Geon-Joong Kim
DOI:10.1016/j.jorganchem.2005.12.044
日期:2006.4
A new dinuclear chiral Co(salen) complexes bearing group 13 metals have been synthesized and characterized. The easily prepared complexes exhibited very high catalytic reactivity and enantioselectivity for the asymmetric ring opening of epoxides with H2O, chloride ions and carboxylic acids and consequently provide enantiomerically enriched terminalepoxides (>99% ee). It also catalyzes the asymmetric
Dinuclear salen cobalt complex incorporating Y(OTf)<sub>3</sub>: enhanced enantioselectivity in the hydrolytic kinetic resolution of epoxides
作者:Deepak Patel、Ganesh Ram Kurrey、Sandip S. Shinde、Pradeep Kumar、Geon-Joong Kim、Santosh Singh Thakur
DOI:10.1039/c5ra12408e
日期:——
activation of inactive Jacobsen’s chiralsalenCo(II) (salen = N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine) compound is attained by dinuclear chiralsalenCo(III)–OTf complex formation with yttrium triflate. The yttrium metal not only displays a promoting effect on electron transfer, but also assists in forming two stereocentres of a Lewis acid complex with Co(III)–OTf. We found that the binuclear
Are Highly Stable Covalent Organic Frameworks the Key to Universal Chiral Stationary Phases for Liquid and Gas Chromatographic Separations?
作者:Chen Yuan、Wenyan Jia、Ziyun Yu、Yanan Li、Min Zi、Li-Ming Yuan、Yong Cui
DOI:10.1021/jacs.1c11051
日期:2022.1.19
High-performance liquid chromatography (HPLC) and gas chromatography (GC) over chiralstationaryphases (CSPs) represent the most popular and highly applicable technology in the field of chiral separation, but there are currently no CSPs that can be used for both liquid and gas chromatography simultaneously. We demonstrate here that two olefin-linked covalent organic frameworks (COFs) featuring chiralcrown ether
Hydrolytic Kinetic Resolution of Terminal Epoxides catalyzed by Novel Bimetallic Chiral Co (Salen) Complexes
作者:Rahul B. Kawthekar、Geon‐Joong Kim
DOI:10.1080/00397910701872658
日期:2008.3.28
complexes bearing transition-metal salts have been synthesized. The easily prepared complexes exhibited very high catalytic reactivity and enantioselectivity in hydrolytic kinetic resolution (HKR) of racemicterminalepoxides and consequently provided enantiomericallyenrichedepoxides (up to 99% ee).
已经合成了带有过渡金属盐的新型双金属手性 Co (salen) 配合物。容易制备的配合物在外消旋末端环氧化物的水解动力学拆分 (HKR) 中表现出非常高的催化反应性和对映选择性,因此提供了对映异构体富集的环氧化物(高达 99% ee)。