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  • 1
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis and biological testing of analogues of Met-enkephalin, a recently discovered opioid peptide from mammalian brain, are described. Testing involved determination of affinity constants for an opiate receptor site and of analgesic potency in the tail-flick test in mouse. The effects on opioid activity of modifying various parts of the enkephalin molecule are discussed. Tyr-D-Ala-Gly-MePheMet (O)-olThe ending -ol added to the symbol of an amino acid designates the aminoalcohol obtained by reduction of the α-carboxyl group of the amino acid. (FK 33-824), which was highly active in these tests, was subsequently selected for clinical testing.The use of two complementary models - in vitro binding studies and in vivo test for analgesia - for the assessment of biological activity in the evaluation of analogues is explained.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 70 (1987), S. 2232-2244 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Position 5 at the Oxotremorine Skeleton as the Stearing Position for Activity at the Muscarinic ReceptorsSubstitution of the Ch2 group at position 5 of oxotremorine (2) by electronegative atoms like O- or N-atom, or by sterically bulkier groups like methyl, N-formyl, or N-acetyl Changes the pharmacological profile of oxotremorine drastically. The O- and N-analogues were potent but unselective (M1/M2) muscarinic agonists. The methyl analogue ((R)-BOK-1) is a muscarine antagonist which is 10 times more potent on the ganglion cervical superius (pA2 = 9.3) than pirenzepine and is able to distinguish between the ileal and ganglion receptor by a factor of 100. The N-formyl derivative differentiates between the two receptors by a factor of 500 with a potency comparable to pirenzepine. The two M1-selective antagonists have higher affinity to the rat-ganglion receptors compared to the affinity to rat-cortex homogenate. The synthesis and the pharmacological activity of several new oxotremorine analogues are discussed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 57 (1974), S. 533-545 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The constitution of Chlamydocin - a metabolite of Diheterospora chlamydosporia with pronounced cytostatic activity - is proposed on the basis of chemical reactions and physical data. The synthesis of a derivative of a new amino acid is described. The biological activities of this compound and of derivatives of Chlamydocin are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 56 (1973), S. 619-625 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The structure and absolute configuration of Cryptosporin (11), a metabolite of the fungus Cryptosporium pinicola LINDER has been elucidated.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 56 (1973), S. 2694-2698 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The constitution of Chrysodin (2), a metabolite of Sepedonium chrysospermum, is proposed on the basis of chemical transformations and physical measurements.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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