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1

Digitale Medien

Structure of boromycin95th Comm. of the series Metabolic Products of Microorganisms. -94th comm.: [1]. (1971)

Dunitz, J. D. ; Hawley, D. M. ; Mikloš, D. ; [weitere]

New York, NY : Wiley-Blackwell

Helvetica Chimica Acta 54 (1971), S. 1709-1713

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ISSN: 0018-019X

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The structure II of boromycin C45H74BNO15 (cf. [2]) has been established by combination of chemical evidence with X-ray analysis. The antibiotic is a D-valine ester of a Böeseken-complex of boric acid with a macrodiolide of a new type.

Zusätzliches Material: 1 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/hlca.19710540624

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2

Digitale Medien

Uptake of mercury by caged crayfishThe views expressed are those of the authors and do not necessarily reflect the view of the Ontario Ministry of the Environment. (1988)

Parkst, J W ; Sutton, J A ; Hollinger, J D ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Applied Organometallic Chemistry 2 (1988), S. 181-184

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ISSN: 0268-2605

Schlagwort(e): Mercury bioaccumulation ; crayfish ; water ; food ; Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: An in situ caged crayfish experiment was conducted in the Wabigoon River System, Ontario, Canada to determine the relative importance of food and water pathways for mercury accumulation in crayfish. Two groups of 160 crayfish were suspended in the water column; one at an ucontaminated site, the other at a location with highly elevated total mercury and methylmercury levels in water. Crayfish at each site were divided into two groups. Crayfish were fed either sucker flesh obtained from an uncontaminated lake (low mercury diet) or walleye flesh from contaminated Clay Lake, Ontario, Canada (high mercury diet). After 10 weeks crayfish at both sites fed the high mercury diet had over 20 times mercury accumulation compared to crayfish on the low mercury diet. There was no statistical effects due to sharply elevated water concentrations of total and methylmercury on mercury bodyburdens. This indicated that food was the dominant pathway for mercury accumulation in crayfish.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aoc.590020213

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3

Unbekannt

Transportation noise pollution - Control and abatement (1970)

Dickerson, D. O. ; Hart, F. D. ; Jarvis, C. E. ; [weitere]

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: Control and abatement of transportation noise pollution

Schlagwort(e): GENERAL

Materialart: NASA-CR-115881

Format: application/pdf

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4

Digitale Medien

Structures and Electrical Properties of Some New Organic Conductors Derived from the Donor Molecule TMET (S,S,S,S,-Bis(dimethylethylenedithio) tetrathiafulvalene) (1987)

Karrer, Andreas ; Wallis, John D. ; Dunitz, Jack D. ; [weitere]

New York, NY : Wiley-Blackwell

Helvetica Chimica Acta 70 (1987), S. 942-953

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ISSN: 0018-019X

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Crystal structures and electrical properties of radical-cation salts of the chiral organic donor TMET (S,S,S,S,-bis-(dimethylethylenedithio)tetrathiafulvalene) are described. Two structural types, 2:1 with octahedral anions Pf-6, AsF-6, SbF-6, I-3 (incommensurate), and 3:2 with tetrahedral anions BF-4, CIO-4, ReO-4 are observed. Resistivity measurements between 2 and 298 K indicate that the 3:2 types are organic metals, while the other compounds are semiconductors. (TMET)3(CIO4)2 is metallic down to about 120 K at ambient pressure and remains metallic down to 2 K at 8 kbar.

Zusätzliches Material: 10 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/hlca.19870700405

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5

Digitale Medien

Synthesis, Structure Elucidation, and Pharmacological Evaluation of 5-Methyl-oxymorphone (= 4,5α-epoxy-3,14-dihydroxy-5,17-dimethylmorphinan-6-one) (1988)

Schmidhammer, Helmut ; Deeter, Jack B. ; Jones, Noel D. ; [weitere]

New York, NY : Wiley-Blackwell

Helvetica Chimica Acta 71 (1988), S. 1801-1804

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ISSN: 0018-019X

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Synthesis of 5-methyl-oxymorphone (3) was accomplished by oxidation of 5-methylthebaine (4) with performic acid, followed by catalytic hydrogenation and cleavage of the 3-MeO group. X-Ray analysis confirmed that the 14-OH group has, like the one in oxymorphone (1), β-orientation. Pharmacological studies in vivo and in vitro showed 3 to possess slightly less opioid agonistic properties than 1.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/hlca.19880710721

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6

Digitale Medien

Interactions between Functional Groups. Part III. The Structure of N,N-Dimethyl-8-nitro-1-naphthaleneamine in Seven Crystalline Environments (1986)

Egli, Martin ; Wallis, John D. ; Dunitz, Jack D.

New York, NY : Wiley-Blackwell

Helvetica Chimica Acta 69 (1986), S. 255-266

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ISSN: 0018-019X

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The N,N-dimethyl-8-nitro-1-naphthaleneamine molecule has been observed in seven environments in three crystal modifications. A range of conformations, related by conrotatory motions about the two exocyclic C—N bonds, is observed. In all seven conformations, the lone pair of the amino N-atom is directed approximately towards the nitro N-atom, which is slightly pyramidalized towards the amino group. The NO2 group appears to be a poorer through-space electron acceptor than the carboxylic ester group, in contrast to their through-bond electron-accepting properties.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/hlca.19860690202

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7

Digitale Medien

Chiral metals? A chiral substrate for organic conductors and superconductors (1986)

Wallis, John D. ; Karrer, Andreas ; Dunitz, Jack D.

New York, NY : Wiley-Blackwell

Helvetica Chimica Acta 69 (1986), S. 69-70

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ISSN: 0018-019X

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Chiral metals are so far practically unknown. The synthesis of a chiral substrate for possible organic conductors and superconductors is described.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/hlca.19860690110

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8

Digitale Medien

3-Substituierte 4H-Pyrazolo[5,1-c][1,4]benzoxazine durch intramolekulare Nitriliminaddition (1987)

Janietz, D. ; Khoudary, K. ; Rudorf, W.-D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 343-348

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ISSN: 0021-8383

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: 3-Substituted 4H-Pyrazolo[5,1-c][1,4]benzoxazines by Intramolecular Nitrile Imine Addition

Zusätzliches Material: 3 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/prac.19873290227

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9

Digitale Medien

Bestimmung der Extinktionskoeffizienten der Photoisomeren von 3β-Hydroxy-cholest-5,7-dien (Provitamin D3) (1987)

Gliesing, S. ; Reichenbächer, M. ; Ilge, H.-D. ; [weitere]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 311-320

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ISSN: 0021-8383

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Determination of the Molar Absorptivity (ε) of the Photoisomers of 3β-Hydroxy-cholest-5.7-diene (Provitamin D3)A method is described which allows the determination of the molecular absorptivity (ε) of all components in a four-component system and is applied to the ε-determination of the photoisomers of provitamin D3 (1): prävitamin D3 (2), lumisterol3 (3), and tachysterol3 (4). By means of irradiation with appropriate wavelengths the four-component system is reduced to a two- and a three-component system, respectively, and the unknown molar absorptivities are evaluated numerically or graphically.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/prac.19873290222

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10

Digitale Medien

Intramolekulare 1,3-dipolare Cycloadditionen von Arylaziden mit AlkinylsubstituentenHerrn Prof. Dr. Dr. H. G. O. Becker zum 65. Geburtstag gewidmet (1987)

Rudorf, W.-D. ; Janietz, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 55-61

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ISSN: 0021-8383

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Intramolecular 1,3-Dipolar Cycloadditions of Aryl Azides with Alkynyl SubstituentsReaction of substituted 4-chlorobut-2-ynes 1 with 2-acetaminophenol and 2-aminothiophenol, respectively, leads to the corresponding ethers and thioethers 3 that can be converted into the alkynyl substituted aryl azides 4 by diazotation and reaction with sodium azide. Intramolecular 1,3-dipolar cycloaddition yields 4H-[1,2,3]triazolo [5,1-c] [1,4] benzoxazines and benzothiazines 5. In the same way 1,4-bis(2-acetaminophenoxy)but-2-yne 6 reacts to a 3-(2-azidophenoxy-methyl)-triazolobenzoxazine 9. Its thermal decomposition gives the azomethine 11.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/prac.19873290108

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