2',5,6',7-Tetraacetoxyflavanone - CAS 80604-17-7
Catalog number: 80604-17-7
Not Intended for Therapeutic Use. For research use only.
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2',5,6',7-Tetraacetoxyflavanone isolated from the roots of Scutellaria baicalensis Georgi.
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2',5,6',7-Tetraacetoxyflavanone;2-(5,7-Diacetoxy-4-oxochroMan-2-yl)-1,3-phenylene diacetate
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1.Noninnocent Proton-Responsive Ligand Facilitates Reductive Deprotonation and Hinders CO2 Reduction Catalysis in [Ru(tpy)(6DHBP)(NCCH3)]2+ (6DHBP = 6,6'-(OH)2bpy).
Duan L1, Manbeck GF1, Kowalczyk M1, Szalda DJ1,2, Muckerman JT1, Himeda Y3, Fujita E1. Inorg Chem. 2016 Apr 14. [Epub ahead of print]
Ruthenium complexes with proton-responsive ligands [Ru(tpy)(nDHBP)(NCCH3)](CF3SO3)2 (tpy = 2,2':6',2″-terpyridine; nDHBP = n,n'-dihydroxy-2,2'-bipyridine, n = 4 or 6) were examined for reductive chemistry and as catalysts for CO2 reduction. Electrochemical reduction of [Ru(tpy)(nDHBP)(NCCH3)]2+ generates deprotonated species through interligand electron transfer in which the initially formed tpy radical anion reacts with a proton source to produce singly and doubly deprotonated complexes that are identical to those obtained by base titration. A third reduction (i.e., reduction of [Ru(tpy)(nDHBP-2H+)]0) triggers catalysis of CO2 reduction; however, the catalytic efficiency is strikingly lower than that of unsubstituted [Ru(tpy)(bpy)(NCCH3)]2+ (bpy = 2,2'-bipyridine). Cyclic voltammetry, bulk electrolysis, and spectroelectrochemical infrared experiments suggest the reactivity of CO2 at both the Ru center and the deprotonated quinone-type ligand.
2.A Highly Selective Chemosensor for Cyanide Derived from a Formyl-Functionalized Phosphorescent Iridium(III) Complex.
Bejoymohandas KS1,2, Kumar A1, Sreenadh S1, Varathan E3, Varughese S1, Subramanian V3, Reddy ML1,2. Inorg Chem. 2016 Apr 4;55(7):3448-61. doi: 10.1021/acs.inorgchem.5b02885. Epub 2016 Mar 23.
A new phosphorescent iridium(III) complex, bis[2',6'-difluorophenyl-4-formylpyridinato-N,C4']iridium(III) (picolinate) (IrC), was synthesized, fully characterized by various spectroscopic techniques, and utilized for the detection of CN(-) on the basis of the widely known hypothesis of the formation of cyanohydrins. The solid-state structure of the developed IrC was authenticated by single-crystal X-ray diffraction. Notably, the iridium(III) complex exhibits intense red phosphorescence in the solid state at 298 K (ΦPL = 0.16) and faint emission in acetonitrile solution (ΦPL = 0.02). The cyanide anion binding properties with IrC in pure and aqueous acetonitrile solutions were systematically investigated using two different channels: i.e., by means of UV-vis absorption and photoluminescence. The addition of 2.0 equiv of cyanide to a solution of the iridium(III) complex in acetonitrile (c = 20 μM) visibly changes the color from orange to yellow.
3.A Semi-Conductive Copper-Organic Framework with Two Types of Photocatalytic Activity.
Wu ZL1,2, Wang CH3, Zhao B4, Dong J1, Lu F3, Wang WH3, Wang WC5, Wu GJ1, Cui JZ2, Cheng P1. Angew Chem Int Ed Engl. 2016 Apr 11;55(16):4938-42. doi: 10.1002/anie.201508325. Epub 2016 Jan 6.
Based on the newly designed ligand 4'-(3,5-dicarboxyphenyl)-4,2':6',4''-terpyridine (DCTP), a unique semi-conductive 3D framework {[Cu(Ι) Cu(ΙΙ) 2 (DCTP)2 ]NO3 ⋅1.5 DMF}n (1) with a narrow band gap of 2.1 eV, was obtained and structurally characterized. DFT calculations with van de Waals correction employed to explore the electronic structure of 1, clearly revealed its semi-conductive behavior. Furthermore, we found that 1 exhibits a superior band alignment with water to produce hydrogen and degrade organic pollutants. Without adding any photosensitizers, 1 displays an efficiently photocatalytic hydrogen production in water based on the photo-generated electrons under UV/Vis light. 1 also exhibits excellent photo-degradation of methyl blue under visible-light owing to the strong oxidization of excited holes. It is the first example of MOFs with doubly photocatalytic activities related to photo-generated electrons and holes, respectively.
4.The protective effects of insulin-like growth factor-1 on neurochemical phenotypes of dorsal root ganglion neurons with BDE-209-induced neurotoxicity in vitro.
Bai X1, Chen T1, Gao Y2, Li H3, Li Z1, Liu Z4. Toxicol Ind Health. 2016 Apr 18. pii: 0748233716638004. [Epub ahead of print]
Polybrominated diphenyl ethers (PBDEs) exist extensively in the environment as contaminants, in which 2,2',3,3',4,4',5,5',6,6'-decabrominated diphenyl ether (BDE-209) is the most abundant PBDE found in human samples. BDE-209 has been shown to cause neurotoxicity of primary sensory neurons with few effective therapeutic options available. Here, cultured dorsal root ganglion (DRG) neurons were used to determine the therapeutic effects of insulin-like growth factor-1 (IGF-1) on BDE-209-induced neurotoxicity. The results showed that IGF-1 promoted neurite outgrowth and cell viability of DRG neurons with BDE-209-induced neurotoxicity. IGF-1 inhibited oxidative stress and apoptotic cell death caused by BDE-209 exposure. IGF-1 could reverse the decrease in growth-associated protein-43 (GAP-43) and calcitonin gene-related peptide (CGRP), but not neurofilament-200 (NF-200), expression resulting from BDE-209 exposure. The effects of IGF-1 could be blocked by the extracellular signal-regulated protein kinase (ERK1/2) inhibitor PD98059 and the phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002, either alone or in combination.
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CAS 80604-17-7 2',5,6',7-Tetraacetoxyflavanone

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