Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese von α-Styrylenolethern und Arylacetaldehyden aus Benzylalkoholen (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 2216-2222 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Uncomplicated Synthesis of α-Styrylenol Ethers and Arylacetaldehydes from Benzyl AlcoholsThe reaction of benzyl alcohol with potassium hydroxide in dimethyl sulfoxide yielding (E)-β-(benzyloxy)styrene is described. The mechanism proposed for this reaction was studied by isotope labelling and by introduction of probable intermediates. The reaction is generalized as a preparative method for the synthesis of either arylacetaldehydes or their enol ethers from aromatic aldehydes.
    Notes: Die Umsetzung von Benzylalkohol in Dimethylsulfoxid mit Kaliumhydroxid unter Bildung von (E)-β-(Benzyloxy)styrol (1a) wird beschrieben. Für diese Reaktion wird ein Mechanismus vorgeschlagen, der durch Isotopenmarkierung und Einsatz von Zwischenstufen belegt wird. Die Reaktion wird zu einer präparativen Methode für die Homologisierung aromatischer Aldehyde zu Aryl-acetaldehyden bzw. ihren Enolethern ausgebaut.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219821211
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Eine einfache neue Synthese der Fusarinsäure und anderer 5-Alkyl-2-pyridincarbonsäuren (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 930-949 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Simple Synthesis of Fusaric Acid and Other 5-Alkyl-2-pyridinecarboxylic AcidsCarboxamido groups are introduced into the 6-position of 3-acylpyridines with high regioselectivity via Minisci reaction with formamides, Fe(II) sulfate and tert-butul hydroperoxide. The isolation procedure is considerably improved by the addition of citric acid for complexation of the Fe ions. Fusaric acid and other 5-alkyl-2-pyridine carboxylic acids are obtained by a following Wolff-Kishner reaction in 20-75% overall yield.
    Notes: In 3-Acylpyridine läßt sich durch Minisci-Reaktion mit Formamiden, Fe(II)-sulfat und tert-Butylhydroperoxid gezielt in die 6-Position eine Carboxamidgruppe einführen. Die Aufarbeitung wird durch Zugabe von Citronensäure als Komplexbildner für Eisenionen wesentlich verbessert. Durch anschließende Wolff-Kishner-Reduktion erhält man direkt Fusarinsäure und andere 5-Alkyl-2-pyridincarbonsäuren in 20-75% Ausbeute über beide Schritte.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219820513
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese von TetramethyloxamidKarl Dimroth zum 70. Geburtstag gewidmet. (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 1015-1017 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Simple Synthesis of TetramethyloxamideTetramethyloxamide has been prepared by a new and simple procedure from dimethylformamide, iron(II) sulfate heptahydrate, and tert-butyl hydroperoxide (yield 43%) or 30% aqueous hydroperoxide (yield 77%).
    Notes: Es wird eine neue, einfache Synthese von Tetramethyloxamid aus Dimethylformamid, Eisen(II)-sulfat-heptahydrat und tert-Butylhydroperoxid (Ausb. 43%) oder 30proz. Wasserstoffperoxid (Ausb. 77%) beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810606
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Notizen Eine Synthese von Nornikotin- und Nikotin-2-carboxamid (1983)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 330-333 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A Synthesis for Nornicotine- and Nicotine-2-carboxamide5-(2-Pyrrolidinyl)pyridine-2-carboxamide (6) (R = H) was prepared starting from readily available 4-oxo-4-(3-pyridyl)butyronitrile (4) in three steps in an overall yield of 33% and was methylated in a Leuckart-Wallach reaction to yield 6 (R = CH3) in 68% yield. The key step of the synthesis is the regioselective introduction of the carbamoyl group via Minisci reaction
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198319830217
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...