Chemistry is traditionally divided into organic and inorganic chemistry. Recommanded Product: Ethyl 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 96568-07-9
The palladium-catalyzed coupling of 3- and 4-(trialkylstannyl)pyridines with 7-bromo or 7-chloro 1-substituted 1,4-dihydro-4-oxo-3-quinolinecarboxylates has provided access to the corresponding 1-substituted 1,4-dihydro-4-oxo-7-pyridinyl-3-quinolinecarboxylic acids.The antibacterial activity of these derivatives was studied with the finding that the optimal 1- and 7-position substituents for Gram positive activity are cyclopropyl and 4-(2,6-dimethylpyridinyl), respectively.We find that for the fluorine-substituted derivatives studied, the position of the fluorine on the quinolone nucleus or the number of fluorine atoms does not seem to be important for good Gram positive activity.For 1-cyclopropyl 7-(2,6-dimethyl-4-pyridinyl) derivatives, the 6-fluoro 4a, 8-fluoro 10d, 6,8-difluoro 10b, and 5,6,8-trifluoro 8, all provided equal antibacterial activity against Staphylococcus aureus ATCC 29213.There is also a correlation between the substitution on the 7-(4-pyridynyl) group and the Gram positive activity, particularly for S. aureus, clearly indicating that the 2,6-dimethylpyridil group is optimal.The MIC50 value for the most potent agents in this study against S. aureus ATCC 29213 is 0.008 mug/mL.By comparison, ciprofloxacin and aminopyrrolidine 28 gave values of 0.25 and 0.015 mug/mL, respectively, against this organism.
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Reference£º
1,765-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N759 – PubChem