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
  • 1980-1984  (2)
  • 1970-1974  (1)
  • 1960-1964
  • 1981  (2)
  • 1972  (1)
Material
Years
  • 1980-1984  (2)
  • 1970-1974  (1)
  • 1960-1964
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 333-341 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Cyano-Substituted Heterocycles by Means of Tetraethylammonium CyanideChloropyrimidines 2, 3 and Chlorquinazolines 9, 10, after conversion into trimethylammonio derivatives 4, 5, 11, 12, react with tetraethylammonium cyanide 1a under very mild conditions to give pyrimidine carbonitriles 6, 7 and quinazoline carbonitriles 13, 14. Direct synthesis of quinoxaline carbonitriles 19 is possible by reaction of chloroquinoxalines 15, 18 with 1a.
    Notes: Die Chlorpyrimidine 2, 3 und Chlorchinazoline 9, 10 können nach Überführung in die Trimethyl-ammonioderivate 4, 5, 11, 12 mit Tetraethylammoniumcyanid (1a) unter sehr milden Bedingungen zu den Pyrimidin- und Chinazolincarbonitrilen 6, 7 bzw. 13, 14 umgesetzt werden. Bei den 2-Chlorchinoxalinen 15, 18 gelingt die direkte Substitution mit 1a zu den Nitrilen 19.
    Additional Material: 5 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 1981 (1981), S. 1643-1657 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Trialkylsilyl Trifluoromethanesulfonates, I. - Synthesis of Trialkylsilyl Enol EthersThe reactions of the ketones 2, 2-bromoketones 6, α,β-unsaturated ketones 8, 1,2-diketones, and aliphatic aldehydes 20 with trialkylsilyl triflates 1 in the presence of triethylamine (4) at room temperature yield the silyl enol ethers 3, 7, 9, 11, and 21. The silylation of the unsymmetrical ketones 12 with 1a/4 runs regioselectively in the thermodynamical sense using 1a/12 in excess and yields the enol ethers 13t. The course of this reaction is discussed briefly.
    Notes: Die Ketone 2, 2-Bromketone 6, α,β-ungesättigte Ketone 8, 1,2-Diketone 10 und aliphatische Aldehyde 20 setzen sich mit Trialkyisilyl-triflaten 1 in Gegenwart von Triethylamin (4) bei Raum-temperatur zu den Silylenolethern 3, 7, 9, 11 und 21 um. Die Silylierung unsymmetrischer Ketone 12 mit 1a/4 verläuft mit überschüssigem 1a und 12 regioselektiv im thermodynamischen Sinn zu den Enolethern 13t. Der Reaktionsablauf wird kurz diskutiert.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 762 (1972), S. 62-72 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Orthoamides, XXIII1). - Reaction of Ortho Amide Derivatives with Compounds of the Type X-CH2-CH2-Y.Reaction of the bisdialkylaminoalkoxymethanes (aminal esters) 1a, b, d and trimorpholinomethane (amide aminal, 5) with compounds of the type X-CH2-CH2-Y (X and Y = electron attracting groups) gives the mono- and bis-dialkyiaminomethylene compounds 3 or 4 by abstraction of alcohol or dialkylaminomethane.
    Notes: Die Bis-dialkylamino-alkoxy-methane (Aminalester) 1a, b, d und Trimorpholino-methan (Amidaminal, 5) reagieren mit Verbindungen der Struktur X-CH2-CH2-Y, wobei X und Y elektronenanziehende Gruppen darstellen, unter Abspaltung von Alkohol und Dialkylamin zu den Mono- und Bis-dialkylaminomethylen-Verbindungen 3 bzw. 4.
    Additional Material: 1 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...