ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
Filter
Collection
Keywords
Publisher
Years
  • 1
    facet.materialart.
    Unknown
    Photosensibilisierte [2+2]-cycloadditionen mit 4-oxazolin-2-onen (1978)
    Elsevier
    Details
    Publication Date: 1978-01-01
    Print ISSN: 0040-4039
    Electronic ISSN: 1873-3581
    Topics: Chemistry and Pharmacology
    Published by Elsevier
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Die diastereomeren 2-Aminocyclobutanole (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 1884-1889 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Diastereomeric 2-AminocyclobutanolsSyntheses of the previously unknown 2-aminocyclobutanols are described. The cis-isomer (5) is obtained in two steps by photosensitized cycloaddition of 4-oxazolin-2-one (1) or its acetyl derivative 2 to ethylene and subsequent alkaline hydrolysis of the adducts. Synthesis of the trans-isomer (6) is achieved by catalytic hydrogenation of trans-2-azidocyclobutanol (19), which is available in two steps from the cyclic orthobenzoate 12 and -acetate 13, resp., of cis-1,2-cyclobutanediol (11).
    Notes: Synthesen der diastereomeren 2-Aminocyclobutanole werden erstmals beschrieben. Das cis-Isomere (5) erhält man in zwei Stufen durch photosensibilisierte Cycloaddition von 4-Oxazolin-2-on (1) bzw. dessen Acetyl-Derivat 2 an Ethylen und folgende alkalische Hydrolyse der Addukte. Das trans-Isomere (6) ist durch katalytische Hydrierung des trans-2-Azidocyclobutanols (19) zugänglich, das man in zwei Stufen aus dem cyclischen Orthobenzoat 12 bzw. -acetat 13 des cis-1,2-Cyclobutandiols (11) gewinnt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130523
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese von 4-Oxazolin-2-on (1976)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1976 (1976), S. 1319-1322 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Facile Synthesis of 4-Oxazolin-2-oneA convenient synthesis of the previously unknown 4-oxazolin-2-one (4) starting'from 3-acetyl-oxazolidin-2-one (1) is described. 1H- and 13C-NMR data of 4 are reported.
    Notes: Für das vorher unbekannte 4-Oxazolin-2-on (4) wird eine einfache Synthese ausgehend von 3-Acetyloxazolidin-2-011 (1) beschrieben. 1H- und 13C-NMR-Daten von 4 werden diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197619760719
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    cis-1,2-Cyclobutandiamine durch photosensibilisierte Cyclo-addition von 1,3-Diacetyl-4-imidazolin-2-onen an Olefine (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 248-255 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: cis-1,2-Cyclobutanediamines by Photosensitized Cycloaddition of 1,3-Diacetyl-4-imidazolin-2-ones to Olefins1,3-Diacetyl-4-imidazolin-2-one (8) reacts photosensitized with ethylene in a [2 + 2]-cycloaddition reaction yielding 9. Hydrolysis of 9 leads to cis-1,2-cyclobutanediamine (1) via the cyclic urea 2. By analogy, derivatives of 1 can be obtained using other olefins or alkyl substituted 1,3-diacetyl-imidazolinones (23 and 24).
    Notes: 1,3-Diacetyl-4-imidazolin-2-on (8) reagiert photosensibilisiert mit Ethylen in einer [2 + 2]-Cyclo-addition unter Bildung von 9. Dessen Hydrolyse führt über den Harnstoff 2 zum cis-1,2-Cyclobutandiamin (1). Analog lassen sich mit anderen Olefinen oder alkylsubstituierten 1,3-Diacetyl-imidazolinonen (23 und 24) Derivate von 1 herstellen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810209
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Diels-Alder-Reaktionen mit 3-Acetyl-4-oxazolin-2-on (1977)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 2027-2035 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Diels-Alder Reactions with 3-Acetyl-4-oxazolin-2-one3-Acetyl-4-oxazolin-2-one (4) is a new component for thermal [2 + 4]-cycloadditions. 4 reacts selctively with cyclic 1,3-dienes with formation of the endo-isomers. The cycloadducts can be deacetylated to the corresponding oxazolidin-2-one derivatives or further hydrolyzed to the cis-2-aminoalcohols. In the additions to 1,3-cyclohexadiene, 4 and the structurally related compounds vinylene carbonate and 1,3-diacetyl-4-imidazolin-2-one exhibit comparable dienophilic reactivity.
    Notes: 3-Acetyl-4-oxazolin-2-on (4) ist ein neuer Partner für thermische [2 + 4]-Cycloadditionen. Mit cyclischen 1,3-Dienen reagiert 4 selektiv unter Bildung der endo-Isomeren. Die Cycloaddukte lassen sich zu den entsprechenden oxazolidin-2-on-Derivaten entacetylieren oder weiter zu den cis-2-Aminoalkoholen hydrolysieren. Bei der Addition an 1,3-Cyclohexadien sind 4 und die strukturell verwandten Verbindungen Vinylencarbonat sowie 1,3-Diacetyl-4-imidazolin-2-on vergleichbar reaktive Dienophile.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197719771123
    Location Call Number Expected 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...