Die Verbindungen (I) (n: 1) wurden durch Mannich‐Reaktionen der entsprechenden N‐Aryl‐piperazine mit Formaldehyd und den entsprechenden Benzoxazolinonen die Verbindungen (I) (n: 2, 3) durch Kondensation der entsprechenden 1‐(2‐Chlorethyl)‐ bzw. 1‐(3‐Chlorpropyl)‐4‐arylpiperazine und Benzoxazolinone dargestellt (Ausb. 35‐96%).
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