Synthesis in the Diazasteroid Group. XVII. Syntheses of the 4, 11-Diazasteroid System

…, E ISHIGAMI, H TAKAHATA, T YAMAZAKI

Index: Matoba; Ishigami; Takahata; Yamazaki Chemical and Pharmaceutical Bulletin, 1981 , vol. 29, # 3 p. 651 - 656

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Citation Number: 3

Abstract

5-(2-Oxocyclopentanecarboxamido) quinoline (IVb) was prepared from 5-aminoquinoline (IVa) and 2-carbethoxycyclopentanone (III) and isolated as a crystalline compound. IVb was treated with polyphosphoric acid-xylene to give 4, 11-diazagona-1, 3, 5 (10), 6, 8, 13-hexaen- 12-one (I). Two isomers, 4, 11-diazagona-5, 7, 9, 13-tetraen-12-one (II) and 1, 2, 3, 4, 7, 8, 9, 10, 11-nonahydro-4, 11-diazacyclopenta [b] phenanthren-7-one (VI), were synthesized by ...