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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 9272-9274 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e215-e215 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C16H26O2, (I), prepared by oxidation of (1R*,11R*)-12-hydroxybicyclo[9.4.1]hexadecan-16-one using pyridinium dichromate, has a trans configuration of the two fused rings and represents an interesting precursor for the synthesis of macrocyclic structures.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e352-e352 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The synthesis, spectroscopic data and X-ray structural analysis of the title compound, C26H35NO2S, (I), are described. The crystal contains discrete molecules separated by normal van der Waals distances. The benzenesulfonamide derivative of the corresponding amine allows the assigment of its relative configuration. The secondary amine has been synthesized via a sequential multi-step hydroformylation procedure according to Eilbracht et al. [Chem. Rev. (1999), 99, 3329–3365].).
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e356-e356 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C12H16O4, (I), was prepared by oxidation of (5S*,6R*)-1,7-dioxadispiro[4.0.4.4]tetradecane-2,8-diol using silver(I) carbonate and posesses a cis configuration of the two five-membered-ring lactones fused spiro to the six-membered carbocycle, which has a chair conformation. It represents an exceptional structure for bis-tetrahydrofuran units, which are interesting building blocks in natural products. The synthesis, spectroscopic data and X-ray structural analysis are described. The crystal contains discrete molecules separated by normal van der Waals distances.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1434-193X
    Keywords: Hydroaminomethylation ; Rhodium ; Catalysis ; Carbonylation ; Heterofunctionalised allylic compounds ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -Heterofunctionalised allylic ethers 1, silanes 5, and amines 9 are hydroformylated in the presence of primary or secondary amines 2 to form the corresponding γ-amino- and δ-amino-functionalised compounds. The rhodium(I)-catalysed reaction sequence proceeds by aldehyde formation and subsequent reductive amination to generate the corresponding functionalised secondary or tertiary amines. This selective one-pot hydroaminomethylation procedure establishes access to γ-amino- and δ-amino-functionalised ethers, amines or silanes with potential biological activity.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1434-193X
    Keywords: Hydroformylation ; Amination ; Rhodium ; Homogeneous catalysis ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Starting from diallyl ethers, -silanes, or -amines various di- or triamines with potential biological activity are obtainable in one step by RhI-catalysed hydroaminomethylation of the alkene moieties in the presence of synthesis gas.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1434-193X
    Keywords: Carbonylation ; Wittig reactions ; Rhodium ; Homogeneous catalysis ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -The rhodium(I)-catalysed sequential silylformylation/Wittig olefination of terminal alkynes with hydrosilanes and carbon monoxide in the presence of stabilised P-ylides leads to substituted 2,4-dienoic esters in a one-pot procedure. The α,β,γ,δ-unsaturated esters are generated with high (2E,4Z) stereoselectivity in good to excellent yields. Conversions of the products in [2+1] cycloaddition reactions are presented.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 542-554 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cleavage of Unstrained CC Single Bonds in Tricarbonyliron Complexes of 5,5-Dialkyl-substituted CyclopentadienesCleavage of CC single bonds in η4-spirononadieneiron complex 9 is initiated by Fe2(CO)9 in boiling benzene, leading to the bridged (σ-alkyl-π-cyclopentadienyl)iron complex 10. By Fe2(CO)9 the latter is transformed to the dinuclear “propylfulvene complex” 16. The observed CC bond cleavage reactions of spirocyclopentadienes 6 can also be applied to monocyclic 5,5-dialkylcyclopentadienes 1. Crossover experiments and stereochemical results suggest an intramolecular reaction path and migration of the endo-alkyl group.
    Notes: Die Spaltung einer CC-Einfachbindung im η4-Spirononadieneisen-Komplex 9 wird durch Fe2(CO)9 in siedendem Benzol initiiert und führt zum überbrückten (σ-Alkyl-π-cyclopentadienyl)eisen-Komplex 10. Dieser reagiert - wiederum unter der Einwirkung von Fe2(CO)9 - weiter zum zweikernigen „Propylfulven-Komplex“ 16. Die an Spirocyclopentadienen 6 beobachteten Umwandlungen unter CC-Bindungsspaltung lassen sich auf offenkettige 5,5-Dialkylcyclopentadiene 1 übertragen. Aus Kreuzungsversuchen und stereochemischen Befunden kann ein intramolekularer Reaktionsverlauf unter Wanderung der endo-Alkylgruppe abgeleitet werden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 1420-1430 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ring Opening and Carbonylation of the Spiro[2.4]hepta-4,6-diene System with TetracarbonylnickelNi(CO)4-induced opening of the three-membered ring in spiro[2.4]hepta-4,6-diene (1) is directed by methyl and vinyl substituents. While a methyl group in 1-position hinders the opening of the adjacent three-membered ring CC bond, a vinyl group enhances the opening of this bond. Besides bridged σ-alkyl- and σ-acyl-π-cyclopentadienyl complexes 2,5,6,9, and 10, dinuclear systems 3 and 7 are also formed, containing a μ-[1,5-di(1-5-η-cyclopentadienyl)-3-pentanone] ligand. Formation of this ligand by carbonylation and coupling of two spiroheptadiene units occurs by coordination of a spiroheptadiene molecule to the acyl complex 2 via the nickelocenophanon 14.
    Notes: Die durch Ni(CO)4 induzierte Öffnung des Dreirings in Spiro[2.4]hepta-4,6-dien (1) wird durch Methyl- und Vinylsubstituenten dirigiert. Während eine Methylgruppe in 1-Position die Öffnung der benachbarten Dreiring-CC-Bindung hemmt, wird diese bei Anwesenheit einer Vinylgruppe bevorzugt geöffnet. Neben überbrückten σ-Alkyl- oder σ-Acyl-π-cyclopentadienyl-Komplexen 2, 5, 6, 9 und 10 werden auch zweikernige Systeme 3 und 7 mit einem μ-[1,5-Di(1-5-η-cyclopenta-dienyl)-3-pentanon]-Liganden gebildet. Der Aufbau dieses Liganden durch carbonylierende Kupplung zweier ringgeöffneter Spiroheptadien-Einheiten verläuft über die Anlagerung eines Spiroheptadiens an den Acylkomplex 2 und über das Nickelocenophanon 14.
    Type of Medium: Electronic Resource
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