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  • 2000-2004
  • 1970-1974  (6)
  • 1972  (6)
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  • 2000-2004
  • 1970-1974  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Zum Mechanismus der Dakin-West-Reaktion, III. Ringöffnung von 4-Acyl-oxazolinonen-(5) durch Carbonsäuren (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 1718-1725 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Mechanism of the Dakin-West Reaction, III Ring Opening of 4-Acyloxazolin-5-ones by Carboxylic AcidsBy means of 18O-labelled compounds it was shown that in the Dakin-West reaction of N-benzoylalanine the ring opening of the intermediary 4-acyloxazolin-5-one 1a proceeds via attack of the carboxylic acid on the lactone carbonyl group. In addition, the sec. amino acid derivative N-methyl-N-(benzoyl)phenylglycine shows a considerable amount of ring opening via addition of carboxylate at C-2 of the corresponding oxo-oxazolinium intermediate 13.
    Notes: Mit Hilfe 18O-markierter Verbindungen wird gezeigt, daß bei der Dakin-West-Reaktion von N-Benzoyl-alanin die Ringöffnung des intermediär entstehenden 4-Acyl-oxazolinons 1a durch Angriff der Carbonsäure auf die Lacton-Carbonylgruppe erfolgt. Beim sek. Aminosäure-Derivat N-Methyl-N-benzoyl-phenylglycin tritt daneben in beträchtlichem Umfang Ringöffnung durch Anlagerung von Carboxylat an C-2 der entsprechenden Oxo-oxazolinium-Zwischenstufe 13 ein.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050529
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reaktion von Phthalsäureanhydrid mit Inaminen (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 1368-1376 
    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 Phthalic Anhydride with YnaminesPhthalic anhydride reacts with the ynamine 3a to yield the indandione 5a or the benzoxepinone 11, depending on reaction conditions. In the presence of 4-(dimethylamino)pyridine a phthalide 7a is obtained. On heating 11 isomerizes to the indanone 14a/b, and on acid hydrolysis 11 yields the indenone 13. Stereochemistry and mechanisms of formation of the various products are discussed.
    Notes: Phthalsäureanhydrid und Diäthyl-[propin-(1)-yl]-amin (3a) liefern je nach den Reaktions-bedingungen ein Indan-dion 5a oder Benzoxepinon 11 und in Gegenwart von 4-Dimethylamino-pyridin ein Phthalid 7a. 11 wird beim Erhitzen zum Indanon 14a/b isomerisiert und liefert bei saurer Hydrolyse das Indenon 13. Stereochemie und Bildungsmechanismen der verschiedenen Verbindungen werden diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050428
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Pilzpigmente, IX. Anthrachinon-Pigmente aus Dermocybe cinnabarina (Fr.) Wünsche (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2922-2927 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mushroom Pigments, IX. Anthraquinone Pigments from Dermocybe cinnabarinaAfter acid hydrolysis of the glycoside pigments from Dermocybe cinnabarina, physcion (1), erythroglaucin (2), fallacinol (3), ω-O-acetylfallacinol (4) endocrocin (5) and the new anthraquinone carboxylic acids cinnalutein (6) and cinnarubin (7) were isolated.
    Notes: Aus Dermocybe cinnabarina wurden nach saurer Hydrolyse der Pigmentglykoside neben Physcion (1), Erythroglaucin (2), Fallacinol (3), ω-O-Acetyl-fallacinol (4) und Endocrocin (5) die neuen Anthrachinon-carbonsäuren Cinnalutein (6) und Cinnarubin (7) isoliert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050915
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  • 4
    Electronic Resource
    Electronic Resource
    Pilzpigmente, X. Anthrachinon-glucoside aus Dermocybe sanguinea (Wulf. ex Fr.) Wünsche (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2928-2932 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mushroom Pigments, X. Anthraquinone Glucosides from Dermocybe sanguineaThe isolation and structural elucidation of emodin-1-β-D-glucopyranoside (1) and dermocybin-1-β-D-glucopyranoside (4) are described. 1 and 4 represent the first natural anthraquinone glucosides with a glucose residue at the 1-position.
    Notes: Die Isolierung und Konstitutionsermittlung von Emodin-1-β-D-glucopyranosid (1) und Dermocybin-1-β-D-glucopyranosid (4) werden beschrieben. 1 und 4 sind die ersten natürlichen Anthrachinon-glucoside mit 1-ständigem Glucoserest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050916
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  • 5
    Electronic Resource
    Electronic Resource
    4-Dialkylamino-chinoline und 3,3-disubstituierte 4(3H)-Chinolone aus 4H-3,1-Benzoxazinonen und Inaminen (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 84 (1972), S. 716-718 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19720841510
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  • 6
    Electronic Resource
    Electronic Resource
    4-(Dialkylamino)quinolines and 3,3-Disubstituted 4(3 H)-Quinolones from 4 H-3,1-Benzoxazinones and Ynamines (1972)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 11 (1972), S. 720-722 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.197207201
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