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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 16 (1963), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 9 (1956), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 19 (1966), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Benzeneboric acid causes a marked increase in the endogenous fermentation of pressed baker's yeast. It is shown that an increased leakage of trehalose occurs and it is suggested that benzeneboronic acid affects the permeability of the cytoplasmic membranes.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 763 (1972), S. 135-147 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkylation of Quinones with Radicals: Generation of Radicals in Redox ReactionsCarbon radicals are generated from organic solvents by H-abstraction with OH• (Fenton's reagent). They are scavenged by quinones whereby alkylated quinones are formed. They alkylation proceeds with good yields when the radicals are produced by oxidative decarboxylation of carboxylic acids (with silver ions and persulfate).
    Notes: C-Radikale werden durch H-Abstraktion aus dem organischen Lösungsmittel mit OH-Radikalen (Fentons Reagenz) erzeugt. In Anwesenheit von Chinonen werden die Radikale abgefangen, wobei alkylierte Chinone gebildet werden. Die Alkylierung verläuft in guten Ausbeuten, wenn die Radikale durch oxydative Decarboxylierung von Carbonsäuren (mit Silberionen und Persulfat) erzeugt werden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0170-2041
    Keywords: Carboxy-hydroxylation ; γ-Amino acids ; γ-Lactones ; Muscimol, dihydro- ; Isoxazolines ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Carboxy- und Cyanohydroxylierung von Alkenen. - Synthese von 3-Hydroxy-4-aminosäuren und Butyrolactonen nach der Isoxazolin-MethodeDichlor- und Dibromformaldoxime sind nützliche Komponenten bei 1,3-dipolaren Cycloadditionen. Sie lassen sich leicht und mit hohen Ausbeuten in situ durch Dihalogenierung von Glyoxalsäure-aldoxim mit N-Brom- und N-Chlorsuccinimid oder tert-Butylhypochlorit herstellen. Dehydrohalohalogenierung mit Kaliumhydrogencarbonat in Gegenwart von Alkenen liefert 3-Haloisoxazoline in einer Eintopf-Reaktion. Reduktion mit Eisenpentacarbonyl ergibt β-Hydroxynitrile. Methoxylierung und katalytische Reduktion führt zu β-Hydroxyestern. Allylalkohole und Allylamine werden mit Halogen-nitriloxiden in Butyrolactone(DL-Angelicalacton)bzw. DL-3-Hydroxy-4-aminosäuren (Carnitin, 4-Amino-3-hydroxybuttersäure) übergeführt. Die Lactonisierung erfolgt optimal durch Erhitzen der γ-Silyloxyester in Eisessig mit Kaliumhydrogensulfat als Katalysator. Ferner wird die Synthese von N-Boc-Dihydromuscimol beschrieben.
    Notes: Dichloro- and dibromoformaldoximes are useful 1,3-dipolar cycloaddition reagents. They are conveniently preparated in situ, in high yields by dihalogenation of glyoxalic acid aldoxime with N-bromo- and N-chlorosuccinimide or tert-butyl hypochlorite. Dehydrohalogenation with potassium hydrogen carbonate in the presence of alkenes gives 3-halo-isoxazolines in a one-pot reaction. Reduction with iron pentacarbonyl gives β-hydroxynitriles. Methoxylation and catalytic reduction give β-hydroxy esters. Allyl alcohols and allylamines are transformed with halonitrile oxides into butyrolactones (DL-angelica lactone) and DL-3-hydroxy-4-amino acids (carnitine, 4-amino-3-hydroxybutyric acid), respectively. The lactonization is best effected by heating the γ-silyloxy ester in acetic acid with potassium hydrogen sulfate as catalyst. A synthesis of N-Boc-dihydromuscimol is described.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1973 (1973), S. 231-240 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Spin Delocalization of Elements of Group IV B in Organic CompoundsThere is no need to consider (p-d)π overlap as a mechanism for spin transfer at elements of Group IV B in assumptions of rehybrization. The coupling constants obtained from the NMR and ESR measurements are in good agreement. 117Sn, 119Sn, and 207Pb satellites have been recorded. The (CH3)3PbCH·2 coupling constant is calculated to be -0.40 gauß.
    Notes: Bei der Annahme einer Rehybridisierung ist es nicht nötig, (p-d)π-Delokalisierung zu berücksichtigen, um die Spinübertragung bei Elementen in der Gruppe IV B zu erklären. Die Kopplungskonstanten, die aus den NMR- und ESR-Messungen erhalten werden, stimmen gut überein. Satellitenspektren von 117Sn, 119Sn und 207Pb sind gemessen worden. Die (CH3)3-PbCH·2-Kopplungskonstante ist zu -0.40 Gauß berechnet worden.
    Additional Material: 4 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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