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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 130 (1999), S. 1167-1173 
    ISSN: 1434-4475
    Keywords: Keywords. Triazenopyrazoles; Nucleosides ; convergent synthesis of; Nucleosides ; 1-(5-triazeno)pyrazole; Nucleosides ; 2-(5-triazeno)pyrazole; Human immunodeficiency virus; Herpes simplex virus.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung.  Ethoxymethylenmalonitril und Bis(methlthio)methylenmalonitril wurden mit Hydrazinhydrat zu 5-Aminopyrazol-4-carbonitril (3a) und 5-Amino-3-methyltiopyrazol-4-carbonitril (3b) umgesetzt. Behandlung mit salpetriger Säure und Kupplung mit verschiedenen sekundären Aminen ergab die Triazenopyrazole 4a–j. 5-(3,3-Diethyl-1-triazeno)pyrazol-4-carbonitril (4c) wurde in seine beiden regioisomeren 2-Deoxyribonucleoside 5a,bübergeführt, welche anschließend mit H2O2/OH− zu den entsprechenden Carboxamiden 6a,b hydrolysiert wurden. Alle hergestellten Verbindungen wurden auf ihre biologische Aktivität gegenüber HIV-1 und Herpes simplex getestet. Nur 4c zeigte geringfügige Aktivität gegenüber HIV-1 (ED 50=32μM).
    Notes: Summary.  Ethoxymethylenemalononitrile and bis(methylthio)methylenemalononitrile were condensed with hydrazine hydrate to yield 5-aminopyrazole-4-carbonitrile (3a) and 5-amino-3-methylthiopyrazole-4-carbonitrile (3b), respectively. These compounds were treated with nitrous acid and coupled with different secondary amines to yield the triazenopyrazoles 4a–j. 5-(3,3-Diethyl-1-triazeno)pyrazole-4-carbonitrile (4c) was transferred into its two regioisomeric 2-deoxyribose nucleosides 5a,b which were subsequently hydrolyzed with H2O2/OH− to give the corresponding carboxamides 6a,b. All synthesized compounds were tested for biological activity against HIV-1 and herpes simplex virus, but only 4c showed moderate activity against HIV-1 with ED 50=32μM.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1994 (1994), S. 619-621 
    ISSN: 0170-2041
    Keywords: Uridine, methylene-2-thiohydantoin derivative ; Nucleosides ; 2-Thiohydantoin ; Herpes simplex virus ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 5-Formyl-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)uracil (4) was synthesized from 5-formyluracil (2) and 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose (3) and condensed with 2-thiohydantoin derivatives 5 by using piperidine as the catalyst to give 5-(uridin-5-ylmethylene)-2-thiohydantoin (8a) and 3-phenyl-5-(uridin-5-ylmethylene)-2-thiohydantoin (8b) after deprotection with sodium methoxide in methanol. Compound 8a was also obtained in an inversed reaction sequence from 5-formyluracil starting with condensation with 2-thiohydantoin and then with 3. The compounds 8a and 8b did not show any activity against HSV-1 or HIV-1.
    Type of Medium: Electronic Resource
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