Library

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Electronic Resource  (4)
  • 1975-1979  (4)
  • 1975  (4)
Material
  • Electronic Resource  (4)
Years
  • 1975-1979  (4)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 1733-1743 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cross-correlations for the Influence of Substituents in the Claisen RearrangementThe kinetics of the Claisen rearrangement of trans-cinnamyl aryl ethers 1 with substituents OR both benzene rings has been investigated. The rates follow the simple Hammett equation only for compounds substituted in the cinnamyl group.
    Notes: Die Kinetik der Claisen-Umlagerung von trans-Cinnamylaryläthern 1, die an beiden Benzolkernen substituiert sind, wurde untersucht. Einfache Hammett-Beziehungen ergeben sich nur für die Umlagerungsgeschwindigkeiten bei Variation des Substituenten am Cinnamylrest.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 1009-1017 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aliphatic α-Substituted Nitroso Compounds, II. - Chemistry and Stereochemistry of Some α-Chloro Nitroso TerpenesDiastereomeric α-chloro nitroso compounds derived from carvomenthone, 3-methylcyclo- hexanone, fenchone and camphor have been synthesized. Their stereochemistry is discussed in terms of 1H-NMR and CD data.
    Notes: Diastereomere α-Chlornitrosoverbindungen, die sich von Carvomenthon, 3-Methylcyclo- hexanon, Fenchon und Campher ableiten, werden dargestellt und einige ihrer Umsetzungen untersucht. Die Stereochemie der Verbindungen, erschlossen aus ihren 1H-NMR- und CD- Spektren, wird diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Sulfur Diimides, VI.- Ene Reactions and [2 + 2]-Cycloadditions of N,N′-Ditosyl Sulfur Diimide and N-Sulfinyl-p-toluenesulfonamidePropene derivatives react with N,N′-ditosyl sulfur diimide (1) with formation of allylsulfin- amidines, which rearrange easily to N-allyl-N,N′-thiobis(sulfonamides). In the reaction of 1 with vinyl ethers, [2 + 2]-cycloaddition occurs. If there is an allylic CH-group in the vinyl ether, the initially formed adduct is transformed into N-allyl-N,N′-thiobis(sulfonamide) derivatives.
    Notes: Propenderivate reagieren mit N,N′-Ditosylschwefeldiimid (1) unter Bildung von Allylsulfinsäureamidinen, die sich leicht zu N-Allyl-N,N′-thiobis∼sulfonamiden) umlagern. Bei der Umsetzung von 1 mit Enoläthern erfolgt primär [2 + 21-Cycloaddition; falls im Enoläther allylische CH-Gruppierungen vorhanden sind, stabilisiert sich das Addukt ebenfalls zu N-Allyl- N,N′-thiobis(sulfonamid)derivaten.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On teh Stereochemistry of Allenes, II1). - Teh Molecular Structure of Allenes and Ketenes I. - Synthesis of Allenecarboxylic Acids by the Phosphonate Method and their Optical ResolutionThe synthesis of allenecarboxylic acids 1 from their corresponding ethyl esters 2 and their optical resolution are reported. The use of phosphonates instead of phosphoranes is shown to be useful especially for the preparation of thermally unstable esters 2. The method of resolution described seems to be quite general for allenecarboxylic acids.
    Notes: Die Darstellung von Allencarbonsäuren 1 über ihre Äthylester 2 und ihre Enantiomerenspaltung werden beschrieben. Dabei erweist es sich besonders für die Synthese thermisch instabiler Ester 2 als vorteilhaft, Phosphonate [α-(Diäthoxyphosphoryl)alkansäureester] anstelle von Phosphoranen zu verwenden. Das beschriebene Verfahren der Enantiomerentrennung scheint Allgemeingültigkeit für Allencarbonsäuren zu besitzen.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...