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  • 1
    ISSN: 1434-4475
    Keywords: Arylsulfonylacetophenones ; Thiophenes ; β-Enaminonitriles ; Thienopyrazolopyrimidines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Phenylsulfonylacetophenone1 reagieren mit einem Gemisch aus elementarem Schwefel und Malonsäurenitril zu den entsprechenden 2-Amino-4-aryl-5-phenylsulfonylthiophen-3-carbonitrilen2. Durch Umsetzung mit Stickstoffnucleophilen wie Cyanamid und Hydroxylaminhydrochlorid konnten aus Verbindung2a die entsprechenden Thieno[2,3-d]pyrimidin- und Thieno[2,3-c]pyrazolderivate erhalten werden. Das synthetische Potential und die Anwendbarkeit von5 zur Synthese polyfunktionell substituierter Thieno[2′,3′:3,4]pyrazolo[1,5-a]pyrimidine (8,14,17,20,21) werden beschrieben. Die Strukturen der neuen Verbindungen wurden durch chemische und spektroskopische Methoden abgesichert.
    Notes: Summary Phenylsulfonylacetophenones1 react with a mixture of elemental sulfur and malononitrile to yield the corresponding 2-amino-4-aryl-5-phenylsulfonylthiophene-3-carbonitriles2. Compound2a could be annelated to the corresponding thieno[2,3-d]pyrimidine and thieno[2,3-c]-pyrazole derivatives3 and5 upon reaction with nitrogen nucleophiles (cyanamide and hydroxylamine hydrochloride), respectively. The applicability and synthetic potency of5 to develop a facile convenient route to the polyfunctionally substituted thieno[2′,3′:3,4]pyrazolo[1,5-a]pyrimidines8, 14, 17, 20, and21 is reported. Chemical and spectroscopic evidences for the structures of the new compounds are presented.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 148 (1989), S. 513-517 
    ISSN: 1432-1076
    Keywords: Atypical spondyloarthritis ; Juvenile rheumatoid arthritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Clinical and laboratory findings in 26 children with atypical spondyloarthritis were compared with those of 76 children with juvenile rheumatoid arthritis. The sensitivity, specificity, predictive value, and efficiency for diagnosis were calculated. The following findings (major criteria) were much more common in atypical spondyloarthritis than in juvenile rheumatoid arthritis: (1) spondyloarthritis within the family; (2) enthesopathy; (3) arthritis of digital joints; (4) sacro-iliitis; (5) presence of HLA-B27; (6) frequent recurrence of arthritis and arthalgia. Six additional findings (minor criteria) were significantly more common in atypical spondyloarthritis (SA): (1) disease onset after the age of 10 years; (2) male sex; (3) involvement of the lower extremities; (4) acute iridocyclitis or conjunctivitis; (5) arthritis of the hip joints; (6) manifestation following a history of enteritis. In the presence of 4 major criteria or 3 major and 3 minor criteria, the diagnosis of an atypical SA was established with a sensitivity of 84.6%, a specificity of 100%, and an efficiency of 96.1%.
    Type of Medium: Electronic Resource
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