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  • 1
    ISSN: 1434-4475
    Keywords: 7-Iodo-neopinondimethylacetal ; 5H-10,13-Iminoethanophenanthro[4,5-bcd]furan ; Hofmann-degradation of ammonium-bases ; Azepinocodeines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary In addition to recently reported results [1, 2] we present a new codeine-analogue7 with a different structural pattern in the nitrogen-region of the alkaloid. Synthesis by two different routes and some elucidating reactions are described.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 128 (1997), S. 53-59 
    ISSN: 1434-4475
    Keywords: Propafenone ; Enantiomeres ; Synthesis of ; Chiral pool ; Acetalization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine kurze und effiziente Synthese der Enantiomere des Antiarrhythmikums Propafenon (1) unter Verwendung von sowohl (R)-Isopropylidenglycerintosylat als auch von (S)-Glycidyltosylat als chirale Bausteine wird beschrieben. Der Schlüsselschritt der in sehr guter Ausbeute verlaufenden Synthese ist die Acetalisierung der Carbonylgruppe in 1-(2-Hydroxyphenyl)-3-phenyl-1-propanon (2), welche die Anwendung milder Reaktionsbedingungen bei der anschließenden Alkylierung der phenolischen Hydroxylgruppe ermöglicht.
    Notes: Summary A short and efficient synthesis of the enantiomers of the antiarrhythmic drug propafenone (1) is described using both (R)-isopropylideneglycerol tosylate and (S)-glycidyl tosylate as chiral building blocks. The key step of the high yield synthesis is the acetalization of the carbonyl group in 1-(2-hydroxyphenyl)-3-phenyl-1-propanone (2) which allows application of mild reaction conditions in the subsequent alkylation of the phenolic hydroxy group.
    Type of Medium: Electronic Resource
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