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  • 1
    Electronic Resource
    Electronic Resource
    Herstellung von 6,14-Ethenomorphinan-Derivaten (1993)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1993 (1993), S. 915-919 
    Details
    ISSN: 0170-2041
    Keywords: Buprenorphine ; Diprenorphine ; Rotamers, N-CHO ; Morphinane derivatives ; Alkaloids ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Preparation of 6,14-Ethenomorphinane DerivativesBuprenorphine (5j) and diprenorphine (5k) were synthesized from N-formyl-northebaine (1c) and N-benzyl-northebaine (1d) via new intermediates. N-cyclopropylmethyl-dihydronorthevinone 3d is a suitable compound for the synthesis of both 5j and 5k. We carried out detailed 1H- and 13C-NMR analysis of the new compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1993199301144
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  • 2
    Electronic Resource
    Electronic Resource
    Interpretation of the 13C NMR spectra of 3-benzylideneflavanones, 3-benzylflavone and 3-benzyl-1-thioflavone derivatives (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. 418-421 
    Details
    ISSN: 0749-1581
    Keywords: 13C NMR ; 3-Benzylfavones ; 3-Benzylideneflavanones ; 3-Benzyl-4-thioflavones ; 3-Benzyl-1-thioflavones ; 3-Benzyl-1,4-dithioflavones ; 3-Benzyl-1-thioflavone-1,1-dioxides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 13C NMR spectra of 3-benzylflavones, 3-benzylideneflavanones, 3-benzyl-4-thioflavones, 3-benzyl-1-thioflavones, 3-benzyl-1,4-dithioflavones and 3-benzyl-1-thioflavone-1,1-dioxides were analysed and correlated to evaluate the consequences of the replacement of oxygen with sulphur.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260310422
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  • 3
    Electronic Resource
    Electronic Resource
    1H and 13C NMR study of novel fused 1,2,4-triazole heterocycles (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 1111-1116 
    Details
    ISSN: 0749-1581
    Keywords: 1,2,4-Triazolothiazinoquinolines ; NOE ; 13C shifts ; Chemical shift selective filtering ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1H and 13C NMR spectra of some novel 1,2,4-triazolo [1,3] thiazinoquinoline isomeric pairs are interpreted in terms of structural assignments. The structure of most compounds has been confirmed by NOE difference spectroscopy. Characteristic differences have been observed in both 1H and 13C NMR spectra of these isomeric Pairs: some of the 1H and 13C chemical shifts, and also the one bond 13C—1H couplings of triazole protons, differ consistently in the NMR spectra of the isomers. The coupling constants have been determined using a combination of INEPT and chemical shift selective filtering.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260301115
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