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  • 1
    Digitale Medien
    Digitale Medien
    Enthalogenierung und regioselektive Phosphiniden-Fragmentierung unsymmetrisch substituierter Methylenbisphosphane RXP-CH2-PXR′ mit Fe2(CO)9 (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1999-2006 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Methylenebisphosphanes ; Clusters ; Phosphinidene fragmentation ; Regioselectivity ; Phosphaalkene ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Dehalogenation and Regioselective Phosphinidene Fragmentation of Unsymmetrically Substituted Methylenebisphosphanes RXP-CH2-PXR′ with Fe2(CO)9Reductive dehalogenation of the unsymmetrically substituted methylenebisphosphanes RXP-CH2-PR′X [X = Cl, Br; R = tBu, NEt2; R′ = 2,4,6-R”3C6H2 (R” = Me, tBu), NEt2, 2,6-iPr2C6-H3O, 2,6,4-tBu2MeC6H2O] with Fe2(CO)9 affords, depending on the reaction conditions employed, phosphido complexes [μ2-(RP-CH2-PR′)]Fe2(CO)6 (2) or phosphaalkene clusters (μ3-PR′)(η2,μ3-PRCH2)Fe3(CO)9(6) or [(μ-PR)(η2,μ3PR′CH2)]Fe3-(CO)9 (7), respectively, by regioselective phosphinidene fragmentation of the RP-CH2-PR′ skeletons. The unstable cluster compounds [μ3-PR′-CH2-PR)]Fe3(CO)9 (4) are formed as intermediate products. X-ray structural analysis of 6c (R = tBu; R′ = NEt2) reveals a flat butterfly (μ3-PR)Fe3 structure bridged by the phosphaalkene ligand tBuP = CH2 with a short P = C distance [177.2(4) pm].
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19921250905
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Novel Syntheses of Mono- and Bisphosphonated Aromatic Phosphanes by Consecutive Pd-Catalyzed P-C Coupling Reactions and Nucleophilic Phosphanylation - X-ray Structure of Ph2P-C6H4-m-PO3Na2 · 5.5 H2O · iPrOH (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1029-1034 
    Details
    ISSN: 1434-1948
    Schlagwort(e): Pd-catalyzed P-C coupling ; Nucleophilic phosphanylation ; Mono- and bisphosphonated phosphanes ; Monoesters ; Water solubility ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The triphenylphosphane derivatives 2a and 5, bearing one and two phosphonic ester groups, are accessible in high yields by consecutive Pd-catalyzed P-C coupling reactions of p-bromoiodobenzene with Ph2PH and PhPH2, respectively, and then with diethyl phosphite. Ester hydrolysis yields the highly water-soluble sodium salts of mono- and bis-phosphonated triphenylphosphane, 3a and 6, respectively. On reaction of the p- and m-fluorophenylphosphonic diethyl esters 7a, 7b with Ph2PK and subsequent ester hydrolysis the isomeric disodium (diphenylphosphano)phenylphosphonates 3a, 3b were obtained. The X-ray structure of Ph2P(C6H4-m-PO3Na2) · 5.5 H2O · iPrOH (space group Cmc21) has been determined. In the solid state, it forms a layer structure with hydrophilic (PO32-, H2O, iPrOH) and hydrophobic (Ph2P) compartments, in which the PO32- anionic groups are not engaged in coordination of the sodium cations.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Nucleophilic Phosphanylation of Fluoroaromatic Compounds with Carboxyl, Carboxymethyl, and Aminomethyl Functionalities - an Efficient Synthetic Route to Amphiphilic Arylphosphanes (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 73-82 
    Details
    ISSN: 1434-1948
    Schlagwort(e): Nucleophilic phosphanylation ; Phosphanylphthalic acid ; Phosphanylphenylacetic acid ; Benzylaminophosphanes ; Water solubility ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Chiral- and multiply-carboxylated phosphanes and phosphanyl derivatives of benzoic and phthalic acids (1-9) are accessible in high yields by nucleophilic phosphanylation of potassium or lithium salts of commercially available fluorobenzoic and 3-fluorophthalic acids with Ph2PH, Ph2PK, PhPLi2 Ph(K)P-(CH2)3-P(K)Ph in superbasic media (DMSO/KOH) or in THF and DME. The hitherto unknown phosphanylphenylacetic acids (10-13) and phosphanylbenzylamines RR′P-C6H4-CH2- NH2 (14-19, R, R′ = H, Me, Ph) with unsubstituted amino groups were also synthesized by this method. The diphenylphosphanyl derivatives 14-16 (R, R′ = Ph) are accessible by an alternative method involving LiAlH4 reduction of the phosphanylbenzonitriles (20-22), which were obtained in high yields by nucleophilic phosphanylation of the corresponding fluoro- or chlorobenzonitriles. The novel bidentate phosphanylbenzonitrile 23 has also been obtained using this synthetic route. All compounds were completely characterized by elemental analysis, NMR spectroscopy, and mass spectrometry.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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