Process for forming branched composition catalytically by carbon-hydrogen bond activation in a saturated moiety
申请人:Zhang Zongchao
公开号:US20050272941A1
公开(公告)日:2005-12-08
A branched composition can be formed by reacting a reagent containing a saturated hydrocarbon moiety in the presence of (a) a catalyst capable of activating a carbon-hydrogen bond therein and (b) a branching reagent having a moiety that binds to the carbon atom in the carbon-hydrogen bond upon extraction of the hydrogen atom from that carbon-hydrogen bond. Suitable catalysts are those that comprise a transition metal cation possessing multiple oxidation states that is embedded in an anion that is a transition metal oxide possessing a higher oxidation state for the metal therein than the metal in the cation.
possess a number of interesting biological activities. New, concise syntheticroutes for the facile preparation of both synthetic and natural prodiginines in good yields have been developed, which use BODIPY functionalization reactions, such as condensation, nucleophilic substitution, and BF2 deprotection. This new metal-free synthetic method opens the door toward a wide variety of C-ring functionalized
Nanoscale Metal Coordination Macrocycles Fabricated by Using “Dimeric” Dipyrrins
作者:Hiromitsu Maeda、Takashi Hashimoto
DOI:10.1002/chem.200700444
日期:2007.9.28
Covalently linked dipyrrin (dipyrromethene) dimers have afforded nanoscale [2+2]-type neutral coordinationmacrocycles with a diagonal of about 1.6 nm. Two moieties of the achiral dipyrrin-Zn(II) complex yield the chiral coordinationmacrocycles as minor species, as well as major meso stereoisomers by the covalent linkages. Tetrahedral Zn(II) coordination by using acyclic ligands enables the dipyrrin-metal
An Amphiphilic Fluorescent Probe Designed for Extracellular Visualization of Nitric Oxide Released from Living Cells
作者:Hui-Wen Yao、Xiao-Yan Zhu、Xiao-Feng Guo、Hong Wang
DOI:10.1021/acs.analchem.6b01532
日期:2016.9.20
the membrane anchor. Based on this design, NO released out of the cells has been visualized on the outer surface of the plasma membrane. Using RAW 264.7 cells and ECV-304 cells as models, the diffusion of NO across the plasma membrane has been directly observed. The amphiphilic design strategy of fluorescentprobes holds great promise for developing fluorescent imaging probes to study the release behaviors