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  • 1
    Electronic Resource
    Electronic Resource
    Phosphorescence and Transient Absorption of Azoalkane Triplet States (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 12578-12592 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00155a022
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Asymmetric Addition Reactions with Optimized Selenium Electrophiles (1997)
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 3 (1997), S. 1894-1902 
    Details
    ISSN: 0947-6539
    Keywords: asymmetric synthesis ; chirality ; diselenides ; selenium ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of various nonracemic diselenides by different methods is described. These diselenides are precursors for optically active selenium electrophiles. Their facial selectivity upon addition to styrene was investigated with respect to the chiral moiety neighboring the selenium. Diselenides 1 i, 1 n, and 1 v yielded addition products 7 with diastereomeric excesses up to 95%. Some diselenides, intermediates, and products of the addition reaction were investigated by 77Se NMR spectroscopy.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chem.19970031123
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  • 3
    Electronic Resource
    Electronic Resource
    Chiral Diselenides from Benzylamines: Catalysts in the Diethylzinc Addition to Aldehydes (1996)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 79 (1996), S. 1957-1966 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of new chiral diselenides with a N-atom in the side chain was prepared by a short synthetic sequence (Scheme 1). Only 1 mol-% of these diselenides catalyzed very effectively the diethylzinc addition to various aromatic and α,β-unsaturated aldehydes yielding the secondary alcohols in up to 98% ee (Scheme 2 and Tables 1 and 2). An asymmetric amplification was observed with these catalysts. Detailed NMR studies were performed to characterize the catalytically active species.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19960790718
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Chiral Diselenides in Asymmetric Cyclization Reactions (1998)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1998 (1998), S. 1361-1369 
    Details
    ISSN: 1434-193X
    Keywords: Asymmetric synthesis ; Cyclizations ; Diselenides ; Electrophilic additions ; Selenium ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The use of chiral selenium electrophile 6 generated in situ from the chiral diselenide 5 in asymmetric ring closure reactions of unsaturated alcohols, carboxylic acids and carbamates is presented herein. Tetrasubstituted carbon atoms can be generated selectively with diastereo-selectivities up to 85% when geminal disubstituted alkenes are used. The cyclization of vinylic silanes leads to versatile building blocks for further synthetic transformations.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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