Structures 8-hydroxyquinoline

Copper(II), di-/Lt-bromobis[bromo(pyridine)-structure, 2, 108 Copper 8-hydroxyquinolinate biocidal activity mechanism, 1, 401 fungicide, 1, 399 Copper nitrotetrazole as propellants, 5, 837 Copper phthalocyanine, 1, 333-334 colour and constitution, 1, 345 Coproporphyrin, 4, 382 Coproporphyrin, dehydro-, 4, 382... 

Nitroxoline is the generic name by which 5-nitro-8-hydroxyquinoline is sold as an antibacterial drug. Write its structural formula. 

T. Mori, H. Fujikawa, S. Tokito, and Y. Taga, Electronic structure of 8-hydroxyquinoline Aluminium/LiF/Al interface for organic electroluminescent device studied by ultraviolet photoelectron spectroscopy, Appl. Phys. Lett., 73 2763-2765 (1998). 

J. Lee, Y. Park, S.K. Lee, E.J. Cho, D.Y. Kim, H.Y. Chu, H. Lee, L.M. Do, and T. Zyung, Tris-(8-hydroxyquinoline)aluminum-based organic light-emitting devices with Al/CaF2 cathode performance enhancement and interface electronic structures, Appl. Phys. Lett., 80 3123-3125 (2002). 

Y. Matsumoto, T. Ebata, and N. Mikami, Structure and photoinduced excited state keto enol tauto merization of 7 hydroxyquinoline (CH30H)n clusters. J. Phys. Chem. A106,5591 5599 (2002). 

A predominant toxin (51) from water beetles of the genus llybius (Table V) shows a UV absorption corresponding to hydroxyquinoline or hydroxyiso-quinoline. The H-NMR spectrum exhibits, beside signals of methyl ester and phenol, signals of five aromatic protons as both ABC and AB systems, the latter indicating two protons at C-3 and C-4 in quinoline. Since electron pyrolysis of 51 gives radioactive 8-hydroxyquinoline, its structure is identified as methyl 8-hydroxyquinoline-2-carboxylate (51) and confirmed by synthesis from xanthurenic acid (52) (Scheme 48) (101). The precursor of this alkaloid was shown to be tryptophan (444). 

The main starting point for thin-fihn low molecular weight materials was the work reported by Ching W. Tang and Steven van Slyke of Kodak in 1987, when they described the green electrolnminescence obtained from a thin film of vapour deposited aluminium tris(8-hydroxyquinoline) (Alq). ° Since that time the development of multilayer device structures and several new important classes of organic EL materials has led to snbstantial improvements and to the commercial development of display technologies based on this system. ... 

Structures of some first generation COMT inhibitors pyrogallol, U-0521 (3, 4-dihydroxy-2-methylpropiophenone), tropolone, and 8-hydroxyquinoline. 

Only three constituents have been reported from Broussonetia zeylanica, all by a group at the University of Peradeniya in Sri Lanka [89-91]. A major alkaloid, 8-hydroxyquinoline-4-carbaldehyde (55), was identified as an antimicrobial agent active against Staphyllococus aureus and Candida albicans (the levels of activity were not specified) [89] and then two minor compounds, 3,4 -dihydroxy-2,3 -bipyridine (56) and 3,4-bis(8-hydroxyquinolin-4-yl)-y-butyrolactone (broussonetine, 57), were reported, Fig. (10) [90,91]. However, the structure of 3,4 -dihydroxy-2,3 -bipyridine (56) was revised to 8-hydroxyquinoline-4-carbaldehyde oxime (58) by synthesis [92,93]. Also, it was noted that an artefactual origin of this oxime (58) could not be ruled out due to the presence of the corresponding aldehyde (55) [93]. 

Diazoxine, a red product which accompanies the formation of 8-methoxy-quinoline from 8-hydroxyquinoline and diazomethane, was first encountered by Caronna and Sansone in 1939. Later, it was suggested that the properties of this product were consistent with structure 189 (R = Me, R = R = H). ° Subsequently, this product has been prepared by treatment of the iodide 190 with potassium carbonate, and the betaine structure has been confirmed by spectroscopic and chemical studies. Compound 189 (R = Me, R = R = H) is isolated as hydrated violet-red needles. The UV and visible spectra are strongly dependent on the nature of the solvent the colors of solutions vary from yellow to blue. Bromination gives the 5,7-dibromo derivative (189 R = Me, R = R = Br), which is also obtained from... 

X-Ray analysis has shown Ph3BiCl2 to have a trigonal bipyramidal structure with axial chlorines,183 8-Hydroxyquinoline can displace one chlorine to give Ph3Bi(8-HQ)Cl, which also has a trigonal bipyramidal structure (70). The nucleophilic N interaction with bismuth, d(Bi—N) 2.807 A, causes the twisting of the two nearest phenyl rings.182... 

Attempts to prepare adducts directly from [VO(oxme)2] (138) were unsuccessful and a trigonal bipyramidal structure was suggested for this compound as for [VO(2-Me-oxine)2] (139).825 The [VO(oxine)2X] compounds were prepared by addition of V0S04 to an aqueous solution containing 8-hydroxyquinoline and the base X. For the adducts [VO(oxine)2X], a correlation was found between v(V=0) and the pK of the X ligand, except with bases with substituents where steric hindrance may be operating, and no evidence was obtained for the existence of both cis and trans isomers, unlike the case of [VO(acac)2] adducts (Section 33.5.5.4.ii). For the tris complexes [VO(oxine)3] , an octahedral structure in which one oxine ligand is unidentate and bonded to V was proposed.825... 

Crystallogr., 1984, C40, 476 for the structure of a chiral silicon complex with 8-hydroxyquinoline ligands. 

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