| 摘要 |
Benzo[5.6]pyrano[2.3.4-ij]quinolizine and benzo[5.6]thiopyrano[2.3.4-ij]quinolizine compounds having formula (I), wherein A is sulfur or oxygen; R<1> is selected from the group consisting of hydroxy, protected-hydroxy, C1-C6-alkoxy, halo, amino, C1-C6-alkylamino, hydroxy-C1-C6-alkylamino, bicyclic nitrogen-containing heterocycle, nitrogen-containing aromatic heterocycle, and nitrogen-containing heterocycle; R<2> is selected from the group consisting of hydrogen, halo, C1-C6-alkyl, or halo-C1-C6-alkyl; R<3> is selected from the group consisting of hydrogen, C1-C6-alkyl or C5-C7-cycloalkyl; and R<4> and R<5> are independently selected from the group consisting of hydrogen, C1-C6-alkyl or C1-C6-alkoxyl, having utility as intermediates or having antibacterial or antineoplastic activity.
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