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  • 1
    Electronic Resource
    Electronic Resource
    Anodische Oxidation O-benzoylierter α-Hydroxyessigsäuren - Ein Beitrag zur Reaktivität anodisch umgepolter Carboxylat-Ionen (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2777-2788 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Anodic Oxidation of O-Benzoylated α-Hydroxyacetic Acids - A Contribution to the Reactivity of Anodic Oxidated Carboxylate Ions - “Umpolung”Anodic oxidation of O-benzoylated α-hydroxyacetic acid 1 at graphite electrodes in methanol leads to the corresponding mixed acylals 2 and methyl benzoates 3. The rate 2:3 depends on the substitution of the aromatic ring and can be correlated to Hammett's σ-values.
    Notes: Bei der anodischen Oxidation O-benzoylierter α-Hydroxyessigsäuren 1 an Graphitelektro-den in Methanol entstehen die zugehörigen gemischten Acylale 2 und die entsprechenden Benzoesäure-methylester 3. Das Produktverhältnis 2:3 ist abhängig von der Substitution des Aromaten und läßt sich mit den Hammettschen σ-Werten korrelieren.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180719
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  • 2
    Electronic Resource
    Electronic Resource
    Zum Reaktionsablauf der anodischen Oxidation N-acylierter α-Aminocarbonsäuren (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1575-1578 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Concerning the Reaction Mechanism of the Anodic Oxidation of N-Acylated α-Aminocarboxylic AcidsAnodic oxidation of N-acylated α-aminocarboxylic acids 1 leads by non-Kolbe electrolysis only to substitution products 2; in contrast to O-acylated hydroxycarboxylic acids no fragmentation product 3 can be observed. Derivation of the acids 1 proves that the carboxylate function and not the amide group is involved in anodic oxidation.
    Notes: Die anodische Oxidation N-acylierter α-Aminosäuren 1 führt nach dem Mechanismus der Non-Kolbe-Elektrolyse nur zu den Substitutionsprodukten 2 und - anders als bei O-acylierten α-Hydroxycarbonsäuren - nicht zu den Fragmentierungsprodukten 3. Durch Variation der Säuren 1 wird bewiesen, daß die Oxidation von 1 an der Carboxylatfunktion einsetzt und nicht über die Amidgruppe verläuft.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210907
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  • 3
    Electronic Resource
    Electronic Resource
    1,3-Dioxetanylium-Ionen als Zwischenstufe bei der anodischen Oxidation O-benzoylierter α-Hydroxyessigsäuren? (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 2173-2177 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Anodic Oxidation of O-Benzoylated α-Hydroxyacetic Acids Concerning the Structure of the Cationic IntermediateAnodic oxidation of ([carbonyl-18O]benzoyloxy)acetic acid (1b) at graphite electrodes in methanol leads to the substitution product methoxymethyl benzoate (3) as well as the fragmentation product methyl benzoate (4) recovering all labeled oxygen in the carbonyl groups. This result proves that the 1,3-dioxetanylium ion 2′ is not involved in the non-Kolbe electrolysis of O-benzoylated α-hydroxyacetic acids. The cationic intermediate 2 is of open-chain structure.
    Notes: Die anodische Oxidation von ([Carbonyl-18O]Benzoyloxy)essigsäure (1b) an Graphitelektroden in Methanol liefert unter Erhaltung des markierten Sauerstoffs in der Carbonylposition das Substitutionsprodukt Benzoesäure-methoxymethylester (3) und das Fragmentierungsprodukt Benzoesäure-methylester (4). Damit wird die Beteiligung eines 1,3-Dioxetanylium-Ions 2′ an der Elektrolyse von O-benzoylierten α-Hydroxyessigsäuren ausgeschlossen. Die kationische Zwischenstufe 2 ist offenkettig.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190712
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  • 4
    Electronic Resource
    Electronic Resource
    Palladium-Catalyzed Reactions in Industry, 4[Part 3: Ref.[1].]. Synthesis of New Palladium Catalysts: First Isolation and Characterization of all Intermediates in a Cyclopalladation Reaction (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1259-1264 
    Details
    ISSN: 0009-2940
    Keywords: Palladium ; Phosphanes ; Catalysis ; Cyclopalladation reaction ; Metallacycles ; CH activation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In order to synthesize chiral palladacycles for stereoselective C-C coupling reactions we studied the cyclopalladation of P-chiral phosphanes 2 and 3. New palladium complexes of the type L2PdX2 (6, 8) and LXPd-μ-X2-PdXL (5, 9, X = Cl; L = 2, 3) were isolated. A detailed study of the reactivity of all intermediates towards cyclopalladation proved the mechanism of cyclometalation reactions of o-tolylphosphanes for the first time. Different deuteration experiments clearly demonstrated the higher reactivity of dimeric palladium complexes towards metalation compared to monomeric species. In agreement with this observation only 5 and 9 gave the cyclopalladated products 4 and 10 as revealed by FAB mass spectrometric investigations. Under the described reaction conditions the synthesis of the corresponding palladacycles 4, 10 is not possible because cyclometalation is a reversible process with LXPd-μ-X2-PdXL as thermodynamic more stable products. The results demonstrate the importance of free coordination sites on the metal atom for cyclometalation reactions or more general CH activation processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961291018
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  • 5
    Electronic Resource
    Electronic Resource
    Sitzung vom 11. März 1929 (1929)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 62 (1929), S. A57 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19290620457
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  • 6
    Electronic Resource
    Electronic Resource
    Ueber die Darstellung und Eigenschaften des Trijodresorcins (1876)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 9 (1876), S. 1752-1753 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.187600902216
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  • 7
    Electronic Resource
    Electronic Resource
    Ueber die Diamidosulfobenzid-Dicarbonsäure (1877)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 10 (1877), S. 580-583 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.187701001161
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  • 8
    Electronic Resource
    Electronic Resource
    Sitzung vom 8. April 1929 (1929)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 62 (1929), S. A63 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19290620546
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  • 9
    Electronic Resource
    Electronic Resource
    Sitzung vom 10. Dezember 1928 (1929)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 62 (1929), S. A1 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19290620140
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