• Title/Summary/Keyword: Quinolone dimer

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Synthesis of Asymmetric Dimer of Quinolone Derivatives Using p-TSA (p-TSA를 이용한 퀴놀론 유도체의 비대칭 이합체 합성)

  • 박명숙
    • YAKHAK HOEJI
    • /
    • v.48 no.3
    • /
    • pp.202-206
    • /
    • 2004
  • New asymmetric dimers, N,N'-dialkyl-4'-hydroxy-4-oxo-2,2',3,3'-tetrahydro-2,2'-diphenyl-4,4'-quinolones 3a-f were synthesized through the dehydration and dea1coholation of N-alkylanilines and ethyl benzoylacetate. Dimers 3a-f were identified by NMR, IR and GC-MS. A series of dimer 3a-f has been synthesized using acid-catalyzed one-pot reaction that involved the condensation, cyc1ization and dimerization. Similarly, the 6,6'-methoxy (or 7,7'-methoxy) substituted dimers were prepared from N-alkyl-meta-(or para)-anisidines. Formation of dimers was undertaken with p-toluenesulfonic acid (p-TSA) at 90∼11$0^{\circ}C$ in toluene for 2∼6 hours over the Dean-Stark apparatus.