Abstract
A series of fluoroquinolone antibacterials having the 7-position (10-position of pyridobenzoxazines) substituted with 2,7-diazaspiro[4.4]nonane (4b), 1,7-diazaspiro[4.4]nonane (5a), or 2,8-diazaspiro[5.5]undecane (6b) was prepared, and their biological activities were compared with piperazine and pyrrolidine substituted analogues. Most exhibited potent Gram-positive and Gram-negative activity, especially when side chain 4b was N-alkylated.
MeSH terms
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Bacteria / drug effects*
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Chemical Phenomena
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Chemistry
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Gram-Negative Bacteria / drug effects
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Gram-Positive Bacteria / drug effects
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Molecular Structure
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Piperazines / pharmacology
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Pyrrolidines / pharmacology
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Quinolines / chemical synthesis*
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Quinolines / pharmacology
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Spiro Compounds / chemical synthesis*
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Spiro Compounds / pharmacology
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Structure-Activity Relationship
Substances
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Piperazines
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Pyrrolidines
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Quinolines
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Spiro Compounds