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  • 1970-1974  (43)
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  • 1
    Electronic Resource
    Electronic Resource
    Umsetzungen von O-, N- und S-Carbenpentacarbonylchrom(0)-Komplexen mit N-Acyliminen des Hexafluoracetons zu Oxazolin-Derivaten und Thioäthern (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1581-1588 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Carbene Complexes, LVI. Reactions of O-, N- and S-Carbenepentacarbonylchromium(0) Complexes with N-Acylimines of Hexafluoroacetone to Oxazoline Derivatives and ThioethersReactions of [alkoxy(aryl)carbene]-, [alkoxy(alkyl)carbene]- and [dimethylamino(phenyl)-carbene]pentacarbonylchromium(0) complexes with N-acylimines of hexafluoroacetone yield by ring-formation at elevated temperatures oxazoline derivatives, whereas reaction of [methyl(methylthio)carbene]pentacarbonylchromium(0) gives thioether derivatives with cleavage of the carbene ligand. 1H-n.m.r., i.r. and mass spectra of the new compounds are discussed.
    Notes: Umsetzungen von [Alkoxy(aryl)carben]-, [Alkoxy(alkyl)carben]- und [Dimethylamino(phenyl)carben]-pentacarbonylchrom(0)-Komplexen mit N-Acyliminen des Hexafluoracetons führen bei erhöhten Temperaturen unter Ringschluß zu Oxazolin-Derivaten, während die Umsetzung von [Methyl(methylthio)carben]pentacarbonylchrom(0) unter Spaltung des Carbenliganden Thioäther-Derivate ergibt. 1H-NMR-, IR- und Massenspektren der neuen Verbindungen werden diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060523
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  • 2
    Electronic Resource
    Electronic Resource
    Über eine [3 + 1]-Cycloaddition, II. Reaktionen von 4,5-Dihydro-1,3,5-oxazaphosph(V)olen, VI (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1-7 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On a [3 + 1] Cycloaddition, II. Reactions of 4,5-Dihydro-1,3,5-oxazaphosph(V)olen, VI4,5-Dihydro-1,3,5-oxazaphosph(V)oles 1 react with isonitriles to yield disubstituted 3-imino-4,4-bis(trifluoromethyl)-1-azetines 2 with elimination of phosphoric acid esters. The reaction should proceed via nitrile ylides.
    Notes: 4,5-Dihydro-1,3,5-oxazaphosph(V)ole 1 reagieren mit Isonitrilen zu disubstituierten 3-Imino-4,4-bis(trifluormethyl)-1-azetinen 2 unter Ehmmierung von Phosphorsäureester Eine Nitrilylid-Zwischenstufe wird angenommen.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060102
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Reaktion von Azido-Metallverbindungen mit Isonitrilen: Tetrazolato-Komplexe mit Metall-Kohlenstoff-Bindung (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 1816-1825 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Azidometal Compounds with Isocyanides: Tetrazolato Complexes with Metal-Carbon BondsThe azido complexes As(C6H5)4[Au(N3)4], As(C6H5)4[Au(N3)2], (C6H5)3PAuN3 and [(C6H5)3P]2M(N3)2 (M=Pd, Pt, Hg) react with isocyanides under very mild conditions to give the tetrazolato complexes As(C6H5)4[Au(CN4R)4] (R=CH3, i-C3H7, c-C6H11, CH2C6H5, C6H5, p-CH3O—C6H4), As(C6H5)4[Au(CN4CH3)2], CH3NCAuCN4CH3, (CH3NC)2Pt-(CN4CH3)2, [(C6H5)3P](RNC)M(CN4R)2 (M=Pd, Pt; R=c-C6H11, C6H5) and Hg(CN4CH3)2, respectively. 1H n.m.r. and i.r. spectra as well as acid hydrolysis yielding free 1-substituted tetrazole indicate that in these thermally and chemically stable compounds the tetrazolyl ligands are bonded via C-5 to the metal.
    Notes: Die Tetrazolato-Komplexe As(C6H5)4[Au(CN4R)4] (R=CH3, i-C3H7, c-C6H11, CH2C6H5, C6H5, p-CH3O—C6H4), As(C6H5)4[Au(CN4CH3)2], CH3NCAuCN4CH3, (CH3NC)2Pt- (CN4CH3)2, [(C6H5)3P](RNC)M(CN4R)2 (M=Pd, Pt; R=c-C6H11, C6H5) und Hg(CN4CH3)2 entstehen durch Umsetzung der Azidoverbindungen As(C6H5)4[Au(N3)4], As(C6H5)4[Au(N3)2], (C6H5)3PAuN3 und [(C6H5)3P]2M(N3)2 (M=Pd, Pt, Hg) mit Isonitrilen unter sehr milden Bedingungen (20°). 1H-NMR-und IR-Spektren sowie die Spaltung mit HCl, die zum freien 1-substituierten Tetrazol führt, beweisen das Vorliegen von Metall-Kohlenstoff-σ-gebundenen Tetrazolyl-Liganden in diesen thermisch und chemisch überraschend stabilen Komplexen.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040617
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  • 4
    Electronic Resource
    Electronic Resource
    Über die Reaktion von Hexafluoraceton-azin mit Phosphiten und Tris(dimethylamino)phosphan (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1526-1535 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of Hexafluoroacetone Azine with Phosphites and Tris(dimethylamino)phosphanePhosphites as well as tris(dimethylamino)phosphane react with hexafluoroacetone azine (1) under rearrangement to yield [5,5,5-trifluoro-2,2,4-tris(trifluoromethyl)-1,3-diaza-3-pentenylidene]phosphoranes 4. 1H n.m.r., 31P n.m.r., i.r., and mass spectra of the new compounds are described.
    Notes: Die Umsetzung von Phosphiten wie auch von Tris(dimethylamino)phosphan mit Hexafluoraceton-azin (1) führt unter Umlagerung zu [5,5,5-Trifluor-2,2,4- tris(trifluormethyl)-1,3-daiza-3-pentenyliden]phosphoranen 4. 1H-NMR, 31P-NMR-, IR- und Massenspektren der neuen Verbindungen werden beschrieben.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070513
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  • 5
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese für N-Acylimine des Hexafluor- und symm. Dichlortetrafluoracetons (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1488-1498 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Simple Synthesis of Acylimines of Hexafluoro- and symm. DichlorotetrafluoroacetoneCarbonamides and urethanes react with hexafluoroacetone as well as dichlorotetrafluoro-acetone to yield 2-acylamino-2-hydroxy-1,1,1,3,3,3-hexafluoropropanes and 2-acylamino-2-hydroxy-1,3-dichloro-1,1,3,3-tetrafluoropropanes 3, respectively, which can be transformed by reaction with bis(trifluoroacetic)anhydride in presence of pyridine or quinoline to 2-acylimino-1,1,1,3,3,3-hexafluoropropanes and 2-acylimino-1,3-dichloro-1,1,3,3-tetrafluoropropanes 5, respectively.
    Notes: Carbonsäureamide und Urethane reagieren mit Hexafluoraceton wie auch mit symm. Dichlortetrafluoraceton zu 2-Acylamino-2-hydroxy-1,1,1,3,3,3-hexafluorpropanen bzw. 2-Acylamino-2-hydroxy-1,3-dichlor-1,1,3,3-tetrafluorpropanen 3, die durch Trifluoressigsäure-anhydrid in Gegenwart von Pyridin oder Chinolin in 2-Acylimino-1,1,1,3,3,3-hexafluor-propane bzw. 2-Acylimino-1,3-dichlor-1,1,3,3-tetrafluorpropane 5 übergeführt werden können.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070509
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  • 6
    Electronic Resource
    Electronic Resource
    Reaktionsverhalten von Nitril-yliden verschiedener Provenienz (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1823-1834 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactivity of Nitrile Ylides of Different OriginThermolysis and photolysis of 2,3-dihydro- 1,4,2λ5-oxazaphospholes 2, photolysis of 1- azetines 3 as well as 1,3-elimination of hydrogen chloride from imidoyl chlorides 4 proceeds via the nitrile ylide intermediate 1. This is deduced from the same product ratio of the isomeric cycloadducts 5:6 on trapping with acrylic acid esters.
    Notes: Die Thermolyse und Photolyse von 2,3-Dihydro-1,4,2λ5-oxazaphospholen 2, die Photolyse von 1-azetine 3 wie auch die 1,3-Eliminierung von Chlorwasserstoff aus Imidoylchloriden 4 verläuft über die Nitril-ylid-Zwischenstufe 1. Dies wird aus dem jeweils gleichen Produkt-verhältnis der isomeren Cycloaddukte 5:6 bei der Abfangreaktion mit Acrylsäureestern abgeleitet.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070608
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  • 7
    Electronic Resource
    Electronic Resource
    Reaktionen mit 4,5-Dihydro- 1,3,5-oxazaphosph(V)olen, VIII. Abfangreaktionen von Nitril-yliden mit Hetero-Mehrfachbindungssystemen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3421-3431 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with 4,5-Dihydro-1,3,5-oxazaphosph(V)oles, VIII. Trapping Reactions of Nitrile Ylides with Hetero-multiple Bond SystemsTrapping reactions of nitrile ylides, generated by thermolysis of 4,5-dihydro-1,3,5-oxaza-phosph(V)oles with hetero-multiple bond systems are described, and orientation phenomena observed are discussed.
    Notes: Abfangreaktionen von Nitril-yliden, die durch Thermolyse aus 4,5-Dihydro-1,3,5-oxazaphosph(V)olen erhalten werden, mit Hetero-Mehrfachbindungssystemen werden beschrieben und dabei auftretende Orientierungsphänomene diskutiert.
    Additional Material: 11 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061026
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  • 8
    Electronic Resource
    Electronic Resource
    Phosphorhaltige Fünfring-Heterocyclen, 1. Synthese von 4.5-Dihydro-1.3.5Pv-oxazaphospholen (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 1826-1829 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Five-membered Heterocycles Containing Phosphorus, 1. Synthesis of 4.5-Dihydro-1.3.5Pv-oxazaphospholes1.1.1.3.3.3-Hexafluoro-2-(acylimino)propanes (1) react with phosphites (2) in a 4+1-cyclo-addition reaction to yield 4.5-dihydro-1.3.5Pv-oxazaphospholes (3). I.r., n.m.r., u.v. and mass spectra data of the new heterocyclic system are given.
    Notes: 1.1.1.3.3.3-Hexafluor-2-acylimino-propane (1) reagieren mit Phosphiten (2) unter 4+1-Cycloaddition zu 4.5-Dihydro-1.3.5Pv-oxazaphospholen (3). IR-, NMR-, UV- und Massenspektren des neuen heterocyclischen Systems werden beschrieben.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040618
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  • 9
    Electronic Resource
    Electronic Resource
    Nitril-ylide durch thermische und photochemische Cycloeliminierung von 4.5-Dihydro-1.3.5-oxazaphosph(V)olen (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 3814-3823 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrile Ylides by Thermal and Photochemical Cycloelimination of 4.5-Dihydro-1.3.5-oxazaphosph(V)oles4.5-Dihydro-1.3.5-oxazaphosph(V)oles 1 undergo thermal as well as photochemical cycloelimination of phosphoric acid ester to yield nitrile ylides which can be trapped by dipolarophiles. Using unsymmetrically substituted alkynes and alkenes both orientation directions of the dipolarophile with respect to the 1·3-dipole were observed.
    Notes: 4.5-Dihydro-1.3.5-oxazaphosph(V)ole 1 zerfallen beim Erhitzen sowie bei der Photolyse unter Cycloeliminierung von Phosphorsäureester zu Nitril-yliden, die mit Dipolarophilen abgefangen werden können. Bei der Verwendung von unsymmetrisch substituierten Alkinen und Alkenen konnten in allen bisher untersuchten Fällen beide möglichen Orientierungen des Dipolarophils bezüglich des 1·3-Dipols nachgewiesen werden.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721051209
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  • 10
    Electronic Resource
    Electronic Resource
    Basen-induzierte Fragmentierung von 2.2-Bis-trifluormethyl-oxazolidonen-(5) (1970)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 741 (1970), S. 39-44 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Base Induced Fragmentation of 2,2-Bis-trifluoromethyl-5-oxazolidonesThe reaction of 2,2-bis-trifluoromethyl-5-oxazolidones 1 with bases in presence or absence of solvents yields N-alkylidence - or N-arylidene-[2,2,2-trifluoro-1-trifluoromethylethylamines] 2. A reaction mechanism is discussed.
    Notes: Durch Umsetzung von 2.2-Bis-trifluyormethyl-oxazolidonen-(5) 1 mit Basen in An- oder Abwesenheit von Lösungsmitteln werden N-Alkyliden- bzw. N-Aryliden-[2.2.2-trifluor-1-trifluormethyl-äthylamine] 2 erhalten. Der Mechanisms der Reaktion wird diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19707410105
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