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
    Addition von Aldehyden an aktivierte Doppelbindungen, XIX. Darstellung von ungesättigten 1,4-Diketonen (1979)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 84-94 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition of Aldehydes to Activated to Double Bonds, XIX. Preparation of Unsaturated 1,4-diketonesThiazolium salt-catalysed addition of unsaturated aliphatic aldehydes to vinyl ketones yields unsaturated 1,4-diketones (1-36).
    Notes: Die durch Thiazoliumsalze katalysierte Addition von ungesättigten aliphatischen Aldehyden an Vinylketone führt zu ungesättigten 1,4-Diketonen (1 - 36).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19791120108
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Addition von aliphatischen, heterocyclischen und aromatischen Aldehyden an α, β-ungesättigte Ketone, Nitrile und Ester (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 2890-2896 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition of Aldehydes to Activated Double Bonds, X: Addition of Aliphatic, Heterocyclic, and Aromatic Aldehydes to α, β-Unsaturated Ketone, Nitriles, and Esters.Both aromatic and heterocyclic aldehydes as well as aliphatic aldehydes add to α,β-unsaturated nitriles, esters, and ketones under the catalytic influence of thiazolium salts (3a, b) in the presence of bases, γ-Ketonitriles, γ-keto acid esters, and γ-diketones(4-14) are obtained.
    Notes: Sowohl aromatische und heterocyclische Aldehyde als auch aliphatische Aldehyde addieren an α,β-ungesättigte Nitrile, Ester und Ketone unter dem katalytischen Einfluß von Thiazoliumsalzen (3a, b) in Gegenwart von Basen. Man erhält γ-Ketosäurenitrile, γ-Ketocarbonsäureester und γ-Diketone (4-14).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090821
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Addition von Aldehyden an aktivierte Doppelbindungen, XI. Addition aliphatischer, heterocyclischer und aromatischer Aldehyde an Butenon (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 3426-3431 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition of Aldehydes to Activated Double Bonds, XIAddition of Aliphatic, Heterocyclic and Aromatic Aldehydes to ButenoneA variety of 1,4-diketones is obtained by thiazolium salt catalyzed addition of aliphatic, heterocyclic, and aromatic aldehydes to butenone. The addition of formaldehyde leads to the formation of 2,5,8-nonanetrione.
    Notes: Die durch Thiazoliumsalze katalysierte Addition von aliphatischen, heterocyclischen und aromatischen Aldehyden an Butenon ergibt eine Vielzahl von 1,4-Diketonen. Die Addition von Form-aldehyd führt zu 2,5,8-Nonantrion.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761091020
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Addition von Aldehyden an aktivierte Doppelbindungen, XIII. Synthesen von Tri- und Polyketonen (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1007-1019 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition of Aldehydes to Activated Double Bonds, XIII. Syntheses of Tri- and PolyketonesThiazolium salt catalysed addition of aldehydes to divinyl ketone, dibenzylidenacetone, and difurfurylidenacetone or of laevulinic aldehyde to alkyl vinyl ketones leads to 1,4,7-triketones (2-30). Dialdehydes and α,β-unsaturated ketones yield tetraketones (38-44). Syntheses of 2,5,8,11,14-pentadecanepentaone (36) and of 2,5,8,11,14,17,20-heneicosaneheptaone (37) are described.
    Notes: Thiazoliumsalz-katalysierte Additionen von Aldehyden an Divinylketon, Dibenzylidenaceton und Difurfurylidenaceton oder von Lävulinaldehyd an Alkylvinylketone führen zu 1,4,7-Triketonen (2-30). Dialdehyde ergeben mit α,β-ungesättigten Ketonen Tetraketone (38-44). Synthesen von 2,5,8,11,14-Pentadecanpentaon (36) und von 2,5,8,11,14,17,20-Heneicosanheptaon (37) werden beschrieben.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100321
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Reaktionen von Cyanidionen mit α, β-ungesättigten Estern, II. Reaktionen von Acryl- und Methacrylsäure-ethylester (1979)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 944-949 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Cyanide Ions with α,β-Unsaturated Esters, II1). - Reactions of Ethyl Acrylate and MethacrylateAction of sodium cyanide on ethyl acrylate (1a) and ethyl methacrylate (1b) yields ethyl 2-cyano-3-oxocyclopentanecarboxylates 6a and 6b, respectively. From these were obtained the 3-oxocyclopentanecarboxylic acids 7a and 7b, respectively, and from 7b the isomeric methyl esters 81 and 82 which were separated by distillation.
    Notes: Einwirkung von Natriumcyanid auf Acrylsäure-ethylester (1a) und Methacrylsäure-ethylester (1b) führt zu den 2-Cyan-3-oxocyclopentancarbonsäure-ethylestern 6a bzw. 6b. Daraus erhielt man die 3-Oxocyclopentancarbonsäuren 7a bzw. 7b und aus 7b die isomeren Methylester 81 und 82, die destillativ getrennt wurden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197919790704
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Reaktionen von Cyanidionen mit cc,b-ungesättigten Estern, III. Eine neue Synthese des Ricyclol3.2.l]octansystems (1979)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 1122-1124 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Cyanide Ions with α,β-Unsaturated Esters, III. - A New Synthesis of the Bicyclo[3.2.1]octane SystemReaction of sodium cyanide on diethyl 2,6-dimethyleneheptanedioate (1) yields ethyl 7-cyano-6-oxobicyclo[3.2.1]octane-1-carboxylate (2) by double ring closure. 6-Oxobicyclo[3.2.1]octane-carboxylic acid (4) and its methyl ester 5 were synthesized from 2. Reaction of 2 with chlorotri-methylsilane yields the enol ether 3.
    Notes: Einwirkung von Natriumcyanid auf 2,6-Dimethylenheptandisäure-diethylester (1) ergibt durch doppelten Ringschluß 7-Cyan-6-oxobicycio[3.2.1]octan-1-carbonsäure-ethylester (2). Aus 2 ent-steht 6-Oxobicyclo[3.2.1]octan-1-carbonsäure (4) und deren Methylester 5. Reaktion von 2 mit Chlortrimethylsilan liefert den Enolether 3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197919790807
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Addition aliphatischer Aldehyde an aktivierte Doppelbindungen (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 86 (1974), S. 589-589 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19740861606
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Reaktionen von Cyanidionen mit α, β-ungesättigten Estern, I Reaktionen von Zimtsäureethylestern (1979)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 303-317 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Cyanide Ions with α,β-Unsaturated Esters, I.  -  Reactions of Ethyl CinnamatesHerrn Prof. Dr. H. Hellmann in alter Verbundenheit zum 65. Geburtstag gewidmet.The action of sodium cyanide on ethyl cinnamate (1 with R = C6H5), under polar, aprotic conditions, leads to ethyl 3-cyano-5-oxo-2,3-diphenyl-1-cyclopentanecarboxylate (2 with R = C6H5). A plausible mechanism is proposed. The carboxylic ester 2 (R = C6H5) has been saponified and decarboxylated to give 4-oxo-1,2-diphenyl-1-cyclopentanecarbonitrile (3 with R = C6H5). The structure of this basic compound was ascertained by X-ray analysis after separation of isomers. Substituted ethyl cinnamates 1 (R = Aryl) react analogously to give 2 and 3 (R = Aryl), respectively. The derivates 4-9 of the isomer 3-1 (R = C6H5) are prepared.
    Notes: Einwirkung von Natriumcyanid auf Zimtsäure-ethylester (1 mit R = C6H5) unter polar-aprotonischen Bedingungen führt zu 3-Cyan-5-oxo-2,3-diphenyl-1-cyclopentancarbonsäure-ethylester (2 mit R = C6H5). Ein plausibler Mechanismus wird vorgeschlagen. Verseifung und Decarboxylierung des Carbonsäureesters 2 (R = C6H5) liefert das 4-Oxo-1,2-diphenyl-1-cyclo-pentancarbonsäurenitril (3 mit R = C6H5). Zur Sicherung der Struktur dieser Grundverbindung wurde nach Isomerentrennung eine Röntgenstrukturanalyse gemacht. Substituierte Zimtsäure-ethylester 1 (R = Aryl) reagieren analog zu 2 bzw. 3 (R = Aryl). Es wurden die Derivate 4-9 des Isomeren 3-1 (R = C6H5) darstellt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197919790303
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Addition of Aliphatic Aldehydes to Activated Double BondsAddition of Aldehydes to Activated Double Bonds, Part 5. - Part 4: H. Stetter and M. Schreckenberg, Chem. Ber. 107 (1974), in press. (1974)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 13 (1974), S. 539-539 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.197405391
    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...