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  • Cyclic anhydrides, unsymmetrically spiro-substituted  (1)
  • Keywords. Plant activators; Systemic acquired resistance; Diazotation.  (1)
  • Narcotic analgesics  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Regioselektive Reduktionen von cyclischen Thienospiroanhydriden (1986)
    Springer
    Monatshefte für Chemie 117 (1986), S. 69-88 
    Details
    ISSN: 1434-4475
    Keywords: Cyclic anhydrides, unsymmetrically spiro-substituted ; Reduction ; regioselective
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Regioselective reduction of unsymmetrically substituted spiroanhydrides (A 1 and3) with reducing agents such as sodium boranate, lithium boranate, dimethylamine borane and lithium- or potassium-tri-(sec-butyl)boranate yielded the spirocyclic lactones1 and2 or4 and5, respectively. The influence of the temperature and the sequence of addition of reducing agents on the ratio of the spirocyclic lactones formed was studied in order to obtain a high degree of regioselectivity. Sterical and mechanistic aspects are discussed in order to explain the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809174
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thiamorphinane II (1985)
    Springer
    Monatshefte für Chemie 116 (1985), S. 263-272 
    Details
    ISSN: 1434-4475
    Keywords: Heterocyclic synthesis ; Condensed thiophenes ; Morphinan ; Narcotic analgesics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The present paper is dealing with two isomeric series of 5,5a,6,7,8,9-hexahydro-5,9a-iminoethano-4H-naphthothiophenes (“thiamorphinans”) which were synthesized as a new type of potential narcotic analgesics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00798462
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  • 3
    Electronic Resource
    Electronic Resource
    A Synthetic Approach to Methyl Thieno[2,3-d][1,2,3]thiadiazole Carboxylates via Diazotation (1999)
    Springer
    Monatshefte für Chemie 130 (1999), S. 573-580 
    Details
    ISSN: 1434-4475
    Keywords: Keywords. Plant activators; Systemic acquired resistance; Diazotation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung.  Eine Herstellungsmethode von Thieno[2,3-d][1,2,3]thiadiazolcarbonsäuremethylestern 3 als hochwirksame Induktoren für chemisch induzierte Resistenz (SAR) wird beschrieben. Der Aufbau von entsprechend substituierten Thiophenvorstufen wird beschrieben. Der Ringschluß zum Thiadiazolringsystem erfolgte über Diazotierungstechniken.
    Notes: Summary.  A route to methyl thieno[2,3-d][1,2,3]thiadiazole carboxylates 3 as highly potent inducers of systemic acquired resistance (SAR) is reported. The construction of the appropriately substituted thiophene precursors is elaborated. Cyclization towards the thiadiazole ring system was carried out using diazotation techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00010236
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