- Process for preparing a quinolone-carboxylic acid
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The present invention provides a process for preparing quinolonecarboxylic acid derivatives having the formula (I): wherein R1 is H, halogen, or amino; R2 is halogen; R3 is H, halogen, C1-4 alkoxyl, or CN; R4 is selected from the group consisting of C3-6cycloalkyl, C1-4alkyl, C1-4alkoxyC1-4alkyl, and C1-4alkylaminoC1-4alkyl. The invention also provides new acetophenones having the formula (II) that are intermediates for preparing the compound of the formula (I).
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- Quinolonecarboxylic acid derivatives
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Quinolonecarboxylic acid derivatives of the following formula, STR1 wherein R1, R2, R3 and R4 are each independently hydrogen atom or lower alkyl group; the hydrates or the pharmaceutically acceptable acid addit
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