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
  • Wiley-Blackwell  (124)
  • Institut für Meereskunde  (5)
  • 1980-1984  (110)
  • 1950-1954  (19)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of 2-Norzizaene and 9,10-Dehydro-2-norzizaene (7,7-Dimethyl-6-methylidenetricyclo[6.2.1.01,5]undec-9-ene) via Intramolecular Allyl Cation Induced CycloadditionPreliminary account: [1]. (1983)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 66 (1983), S. 828-841 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 7,7-Dimethyl-6-methylidenetricyclo[6.2.1.01,5]undec-9-ene (10) has been prepared from allylic alcohol 8 in one step in 16% yield. Selective hydrogenation of 10 with diazene gives the 2-norzizaenes 1a and 11.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19830660316
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A Class of Trinuclear Clusters with Carbonyl Bridging (1980)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 63 (1980), S. 29-49 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The impetus for this work was the structure of a trinuclear complex with two carbonyl groups showing incipient triple bridging - Cp2Rh3(CO)4-. Its structure, barrier to rotation of one Rh(CO)2- piece vs. the rest of the molecule, and the nature of the bridging carbonyl interaction are analyzed. Isolobal analogies form an interesting connection between this complex and a bridged isomer of the recently synthesized carbene complexes, Cp2Rh2(CO)2CR2, one isomer of Cp2Rh3(CO)3, and hypothetical carbyne complexes Cp2Rh2(CO)2CH+,-. A general bonding model for Cp2Rh2(μ-CO)2X complexes is constructed. The model, rich in geometrical detail, allows minima for the bridging carbonyl groups bending toward and away from the bonded ligand X.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19800630105
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Alkyl Shifts between Transition Metals and Coordinated Main Group Atoms (1984)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 67 (1984), S. 1-17 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This work considers the theoretical aspects of the shift of an alkyl(or aryl) group from a coordinated phosphine to the 16-electron d8 transition metal to which it is coordinated. This rearrangement at first seems to resemble an anionic [1,2]-sigmatropic shift. But a detailed analysis of the relatively low barrier calculated for the reaction shows how all traces of the forbiddeness of the reaction have vanished. Phenyl migration should eb still more facile. We also analyze in some detail the possible pathways of alkyl halide addition to a phenyl-Pt complex. An alkyl migration, now from metal to coordinated C-atom, could possibly intervene in this process.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19840670102
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    1,4-Diazobicyclo[2.2.2]octane-catalyzed coupling of aldehydes and activated double bondsPart 2: see [1].. Part 3. A short ans practical synthesis of mikanecic acid (4-vinyl-1-cyclohexene-1,4-dicarboxylic acid) (1984)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 67 (1984), S. 413-415 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title dicarboxylic acid 1d has been prepared in 24% overall yield via, 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalyzed coupling of ethanal and tert-butyl propenoate (3) to 4, SN2′-reaction to tert-butyl (Z)-2-romomethyl-2-butenoate (5a), dehydrobrominatin to tert-butyl 2-methylidene-3-butenoate (2c), dimerizatoin to di-tert-butyl 4-vinyl-1-cyclohexene-1,4-dicarboxylate (1c) and acidic ester cleavage. Acidic cleavage of easily obtainable 5a affords (Z)-2-bromomethyl-2-butenoic acid (5a) in 68% yield with respect to ethanal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19840670209
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Thion- und Dithioester, XXII. α,β-Ungesättigte Thion- und Dithioester (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 919-933 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thiono and Dithio Esters, XXII. α,β-Unsaturated Thiono and Dithio Estersα,β-Unsaturated thiono and dithio esters such as O-ethyl thiocinnamate (3), methyl dithiocinnamate (7), O-ethyl thiocrotonate (17), and O,O-diethyl dithiofumarate (28) have been prepared by thiolysis between 20 and -75°C from the corresponding O- or S-alkylated tertiary amides or thioamides. They tend to dimerize in part by [4 + 2] cycloadditions. Methyl dithiocrotonate (24) could only be isolated as the endo-dimer 25.
    Notes: α,β-Ungesättigte Thion- und Dithioester wie Thiozimtsäure-O-ethylester (3), Dithiozimtsäure-methylester (7), Thiocrotonsäure-O-ethylester (17) und Dithiofumarsäure-O,O-diethylester (28) sind durch Thiolyse aus den entsprechenden O- oder S-alkylierten tertiären Amiden oder Thio-amiden bei Temperaturen von 20 bis -75°C zugänglich. Sie dimerisieren zum Teil in [4 + 2]-Cycloadditionen. Dithiocrotonsäure-methylester (24) ist nur als endo-Dimeres 25 erhältlich.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130312
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Substitutionsreaktionen an Galliumhalogeniden mit Silylsulfiden (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3858-3866 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substitution Reactions on Gallium Halides with Silyl SulfidesThe reactions between the gallium halides (1, 2, and 3) and the silyl sulfides (CH3)3SiSCH3, (CH3)3SiSC2H5, and (CH3)3SiSC6H5 (4, 5, and 6) in benzene result in the formation of the extremely moisture-sensitive mono-, bis-, and tris(alkyl- and phenylthio)gallanes (7-22). Spectra as well as some physical and chemical properties of the new compounds are given. The possible mechanism of formation and an interesting structural phenomenon of the diiodo(alkylthio)gallanes 12, 13 are discussed.
    Notes: Die Galliumhalogenide GaCl3, GaBr3 und GaI3 (1, 2 und 3) reagieren mit den Silylsulfiden (CH3)3SiSCH3, (CH3)3SiSC2H5 (4, 5 und 6) in Benzol unter Bildung der extrem feuchtigkeitsempfindlichen Mono-, Bis- und Tris(alkyl- bzw. phenylthio)gallane 7-22. Spektroskopische Daten sowie einige physikalische und chemische Eigenschaften der neuen Verbindungen werden mitgeteilt. Der mögliche Bildungsmechanismus und ein interessantes strukturelles Phänomen der Diiod(alkylthio)gallane 12, 13 werden diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831161209
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Stereoselektive Synthese von Alkoholen, XI. Doppelte Stereodifferenzierung bei der Addition von Crotylboronsäureestern an Aldehyde: Prelog-Djerassi-Lacton (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 2357-2370 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Stereoselective Synthesis of Alcohols, XI. Double Stereodifferentiation in the Addition of Crotylboronates to Aldehydes: Prelog-Djerassi LactoneAddition of the (Z)-crotylboronate 11 to (S)-(+)-α-methylbutyraldehyde (4) resulted in the Cram and Anti-Cram diastereomers 6 and 7. Their ratio depended on the chirality of the boronate component. Hence the formation of the alcohol 7 could be favoured by double stereodifferentiation. Similarly, on addition of the (E)-crotylboronate 12 predominant formation of the isomer 13 could be achieved. These observations formed the basis for a stereoselective synthesis of the Prelog-Djerassi lactone 3.
    Notes: Bei der Addition des (Z)-Crotylboronsäureesters 11 an (S)-(+)-α-Methylbutyraldehyd (4) erhielt man ein Gemisch der Cram- und Anti-Cram-Addukte 6 und 7. Das Diastereomerenverhältnis hing von der Chiralität der Boronsäureester-Komponente ab. So ließ sich die Bildung des Homoallylakohols 7 durch doppelte Stereodifferenzierung begünstigen. Bei der Addition des (E)-Crotylboronsäureesters 12 konnte man die bevorzugte Bildung des Isomeren 13 erreichen. Diese Beobachtungen wurden zu einer stereoselektiven Synthese des Prelog-Djerassi-Lactons 3 ausgenutzt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150628
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Synthesis of α,β-Unsaturated and Other Reactive Acyl Cyanides (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 3880-3885 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesen von α,β-ungesättigten und anderen reaktiven AcylcyanidenReaktive aliphatische Acylcyanide (1-10, siehe Tab. 1) werden aus Acylchloriden, Natriumiodid und Kupfer(I)-cyanid unter verschiedenen Bedingungen dargestellt. Die Reaktion verläuft über die Acyliodide.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821151219
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Stereoselektive Synthesen von Alkoholen, IV. Konformationseinflüsse auf die Stereochemie der Allylsulfoxid-Sulfensäure-allylester-Umlagerung (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 856-863 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Stereoselective Synthesis of Alcohols, IV. Conformational Factors Determining the Stereochemistry of the Allyl Sulfoxide/Allyl Sulfenate-RearrangementThe stereochemistry of the [2,3]sigmatropic rearrangement of the conformationally rigid allyl sulfoxides 5 revealed a 6.2 fold preference for axial formation of the new C — O-bond. This preference dominates the 3.1 fold preference for an exo-versus endo-transition state. These data form the basis for a discussion of the stereochemistry of rearrangement of the conformationally flexible allyl sulfoxides 1 and 13.
    Notes: Aus der Stereochemie der [2,3]sigmatropen Umlagerung der konformativ fixierten Allylsulfoxide 5 kann man eine 6.2-fache Präferenz für eine axiale Neuknüpfung der C — O-Bindung ableiten, die über eine 3.1-fache Präferenz für einen exo-Übergangszustand dominiert. Diese Vorstellungen wurden auf die Umlagerung der konformativ flexiblen Allylsulfoxide 1 und 13 übertragen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130307
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    2,2,4,4-Tetramethyl-3-methylenebicyclo[3.2.1]oct-6-ene (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 3325-3329 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2,2,4,4-Tetramethyl-3-methylenbicyclo[3.2.1]oct-6-enDie sterisch anspruchsvolle Titelverbindung 1 wurde in einer Eintopfreaktion aus Cyclopentadien und 2,4-Dimethyl-3-[(trimethylsilyl)methyl]-3-penten-2-ol (5) in Gegenwart von Titantetrachlorid/N-Methylanilin hergestellt. 2,2,4,4-Tetramethylbicyclo[3.2.1]oct-6-en-3-on (4) wurde vereinfacht im 15-g-Maßstab dargestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841171117
    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...