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  • Alkaloids  (1)
  • Dermatology  (1)
  • 1
    Keywords: Neurofibromatoses genetics ; Neurofibromatoses physiopathology ; Dermatology ; Genetics ; Genomics ; Molecular Biology ; Neurology ; Neurosurgery ; Pediatrics
    Description / Table of Contents: The neurofibromatoses are autosomal-dominant genetic disorders of the nervous system that primarily affect the development and growth of neural cell tissue. These disorders cause tumors to grow on nerves and produce other abnormalities such as skin changes and bone deformities. In recent years, the genes and mutations causing neurofibromatoses have been identified. The main types of neurofibromatoses, type 1 (NF1) and type 2 (NF2), have been shown to be distinctive disorders both clinically and genetically. More recently, allelic and non-allelic subtypes of NF1 have been defined as well as the NF2-related condition schwannomatosis. Many of the complex molecular mechanisms leading to the neurofibromatoses have been elucidated, resulting in a growing body of publications which are difficult to keep up with.This volume provides an important overview of recent findings on the neurofibromatoses. It focuses on the genetics and molecular biology underlying these diseases, but also covers their clinical features, diagnosis and treatment, stressing the need for interdisciplinary medical care. With contributions by the foremost investigators in the field, this timely book will appeal to geneticists, genetic counselors, pediatricians, neurologists and oncologists
    Type of Medium: Online Resource
    Pages: X + 192 S
    Edition: Online-Ausg. Online-Ressource Karger eBooks Collection 1997-2009
    ISBN: 9783805585217
    Series Statement: Monographs in human genetics 16
    RVK:
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1998 (1998), S. 1997-2001 
    ISSN: 1434-193X
    Keywords: Alkaloids ; Acetylcholine receptor ; Palladium ; C-C coupling ; Heterocycles ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Epibatidine (1) is a recently discovered trace alkaloid found in the skin of a Latin-American poisonous frog. Its remarkably high analgetic activity is accompanied by high toxicity. Therefore, in order to tune its biological activity, a convergent and efficient synthetic pathway was sought to synthesize epibatidine derivatives with different (het)aryl substituents. The hydro(het)arylation of the key intermediate 7-azabicycloheptene (10) represents such an approach. The synthesis of 10 by a Diels-Alder reaction of an N-activated pyrrole (7) with ethynyl p-tolyl sulfone (6) and subsequent steps has been optimized. The crucial last step, the reductive cleavage of the vinyl sulfone 9, has been replaced by a high-yield fluoride-induced degradation of the β-silylated sulfone 12 to give 10. A number of structurally different racemic epibatidine analogs (16b-e) can be prepared by palladium-catalyzed hydro(het)arylation of 10 with iodo(het)arenes 15b-e in good yields.
    Type of Medium: Electronic Resource
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