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  • 1
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclization of Non-tautomerizing anti-α-Aminohydrazones into N-AminoimidazolidinesThe α-aminoisobutyrophenone phenylhydrazones 3a  -  h have been prepared and their anti-configuration determined UV spectroscopically. Cyclization of 3 with phosgene yields the hexa-hydrotetrazine derivatives 5 which react with water to give the 3-anilino-4-hydroxyimidazolidin-2-ones 6 and with ethanol to give the 4-ethoxy products 8. Cycloaddition of 5 or 8 with alkenes furnishes the perhydroimidazo[3,4-b]pyrazol-3-ones 9.
    Notes: Es wurden die α-Aminoisobutyrophenon-phenylhydrazone 3a  -  h hergestellt und ihre anti-Konfiguration UV-spektroskopisch ermittelt. Die Cyclisierung von 3 mit Phosgen führt zu den Hexahydrotetrazin-Derivaten 5, die mit Wasser in die 3-Anilino-4-hydroxyimidazolidin-2-one 6 und mit Ethanol in die 4-Ethoxyprodukte 8 übergehen. Cycloaddition von 5 oder 8 mit Alkenen liefert die Perhydroimidazo[3,4-b]pyrazol-3-one 9.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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