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
    Reaktionen von Arylidentetralonen mit Cyanessigsäurederivaten (1979)
    Springer
    Monatshefte für Chemie 110 (1979), S. 249-256 
    Details
    ISSN: 1434-4475
    Keywords: 2-Arylidene-1-tetralone ; Benzo[h]quinoline-2-one ; Michael reaction, heterocycles by
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Some reactions of 2-arylidene-tetralones1 with cyanoacetamide and alkyl cyanoacetates under basic conditions are described. From1 and cyanoacetamide the benzo[h]quinoline-2-ones3 are formed by cyclization with the carboxamide group, the intermediate addition product2 is not isolable. The addition products5 from1 and cyanoacetates however are crystalline compounds, which are converted by cyclization via the ester group to lactones6, and then oxidized to7. The expected products from a cyclization with the cyanide group are not found. The possibility of this cyclization path is shown by reaction of5 to the tetracyclus10 whose structure is found to be analogue to that of the reaction product from11-obtained by reaction from1 and malononitrile-to12.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00911912
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Zur Darstellung von 6-Oxo-2H-pyrano[2,3—c]pyrazolen (1980)
    Springer
    Monatshefte für Chemie 111 (1980), S. 53-61 
    Details
    ISSN: 1434-4475
    Keywords: Elimination ; Mechanism ; Michael addition ; Pyrano-[2,3-c]pyrazoles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract By the reaction of 4-dimethylaminomethylene-3-methyl-1-phenylpyrazol-5-one (3) with methylene compounds like malonodinitrile, cyanoacetamide and alkyl cyanoacetate a number of different substituted title compounds may be prepared. The mechanism of this reaction is illucidated by isolation of the intermediate ethenyl compounds7, 8, 11, 14 and16. The reaction therefore is best described as a sequence of addition, elimination and cyclisation with partial hydrolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00938717
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Zur Synthese von 4-Aryl-5,6-dihydro-benzo[h]chinolinen (1979)
    Springer
    Monatshefte für Chemie 110 (1979), S. 115-119 
    Details
    ISSN: 1434-4475
    Keywords: Benzo[h]quinolines ; Mechanism ; Michael addition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new route to the benzo[h]quinoline system3 byMichael-addition of malononitrile to 2-arylidene-1-tetralones1 is presented. The mechanism of this reaction is elucidated by isolation of the intermediate 4H-naphtho[1,2—b]-pyrane2 and its reaction to3. The reaction is proposed to be a sequence of addition, cyclisation,Dimroth-rearrangement and disproportionation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903753
    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...