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  • 1
    Electronic Resource
    Electronic Resource
    Siebengliedrige Ringe durch 1,5-Cycloadditionen, V Perhydro-1,4-diazepine (1979)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 400-407 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Seven-Membered Rings by 1,5-Cycloadditions, V.  -  Perhydro-1,4-diazepines1,3-Dialkyl-1,3-imidazolidines 2 react with cyclic enol ethers 1 in presence of trifluoroacetic acid to give bicyclic perhydro-1,4-diazepines 3 which are transformed by lithium tetrahydridoaluminate to perhydro-1,4-diazepinylalkanols 8. In contrast, acyclic enol ethers 9 do not undergo polar 1,5-cycloaddition with imidazolidines 2 but give (dialkoxyalkyl)ethylenediamines 10 in low yields.
    Notes: 1,3-Dialkyl-1,3-imidiazolidine 2 reagieren mit den cyclischen Enolethern 1 in Gegenwart von Trifluoressigsäure zu den bicyclischen Perhydro-1,4-diazepinen 3, die mit Lithium-tetrahydridoaluminat die Perhydro-1,4-diazepinylalkanole 8 geben. Die acyclischen Enolether 9 gehen dagegen keine polare 1,5-Cycloaddition ein und führen mit den Imidazolidinen 2 in niedriger Ausbeute zu den (Dialkoxyalkyl)ethylendiaminen 10.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197919790312
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  • 2
    Electronic Resource
    Electronic Resource
    Siebengliedrige Ringe durch 1,5-Cycloadditionen, VI. 7-Aminoperhydro-1,4-oxazepine und -diazepine (1980)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 1573-1582 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Seven-Membered Rings by 1,5-Cycloadditions, VI1). - 7-Aminoperhydro-1,4-oxazepines and -diazepines3-Alkyl-1,3-oxazolidines 2 react with enamines 1 in the presence of trifluoroacetic acid to give 7-dialkylaminoperhydro-1,4-oxazepines 3. 1,3-Dimethyl-1,3-imidazolidine (2d) reacts with 4-(2-methyl-1-propenyl)morpholine (1a) to give 1,4,6,6-tetramethyl-7-morpholino-2,3,4,5,6,7-hexa-hydro-1 H-1,4-diazepine (3m)
    Notes: 3-Alkyl-1,3-oxazolidine 2 geben mit den Enaminen 1 in Gegenwart von Trifluoressigsäure die 7-Dialkylaminoperhydro-1,4-oxazepine 3. 1,3-Dimethyl-1,3-imidazolidin (2d) reagiert mit 4-(2-Methyl-1-propenyl)morpholin (1a) zum 1,4,6,6-Tetramethyl-7-morpholino-2,3,4,5,6,7-hexahydro-1 H-1,4-diazepin (3m).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198019801013
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