Derivative of 7-(piperazine substituted pyrazole aldehyde isoniazid hydrazone) fluoronaphthyridinone carboxylic acid as well as preparation method and application of derivative
The technology of fluoronaphthyridone carboxylic acid and isoniazid is applied in the field of preparation of 7-fluoronaphthyridone carboxylic acid derivatives, which can solve the problems of low therapeutic index, phototoxicity, easy generation of drug resistance, etc. Reduce the chance of drug resistance, reduce toxic side effects, and increase the effect of anti-tuberculosis activity
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Embodiment 1
[0049] The 7-(piperazine-substituted pyrazole aldehyde isoniazid hydrazone) flunalidinone carboxylic acid derivative of this embodiment is 1-cyclopropyl-6-fluoro-7-[3-methyl-4-( Pyridine-4-carbohydrazino)ylidenemethyl-5-piperazin-1-yl-pyrazol-1-yl]-[1,8]naphthyridine-4(1H)-one-3-carboxylic acid, Its chemical structural formula is:
[0050]
[0051] That is, R in formula (I) 1 is a hydrogen atom, R 2 for a hydrogen atom.
[0052] The preparation method of the 7-(piperazine-substituted pyrazole aldehyde isoniazid hydrazone) flunalidinone carboxylic acid derivative of the present embodiment is as follows: take 1.0 g (2.0 mmol) of 1-cyclopropyl-6-fluoro -7-[3-Methyl-4-(pyridine-4-carbohydrazino)ylidenemethyl-pyrazol-1-yl]-[1,8]naphthyridin-4(1H)-one-3- Carboxylic acid (VI) and 0.34g (4.0mmol) of anhydrous piperazine were added to 20ml of anhydrous acetonitrile for reflux reaction for 12h and left overnight; the resulting solid was collected by filtration and recrystallized ...
Embodiment 2
[0054] The 7-(piperazine-substituted pyrazole aldehyde isoniazid hydrazone) flunalidinone carboxylic acid derivative of this embodiment is 1-cyclopropyl-6-fluoro-7-[3-methyl-4-( Pyridine-4-carbohydrazino)ylidenemethyl-5-(4-methylpiperazin-1-yl)-pyrazol-1-yl]-[1,8]naphthyridin-4(1H)-one -3-carboxylic acid, its chemical structural formula is:
[0055]
[0056] That is, R in formula (I) 1 is methyl, R 2 for a hydrogen atom.
[0057] The preparation method of the 7-(piperazine-substituted pyrazole aldehyde isoniazid hydrazone) flunalidinone carboxylic acid derivative of the present embodiment is as follows: take 1.0 g (2.0 mmol) of 1-cyclopropyl-6-fluoro -7-[3-Methyl-5-chloro-4-(pyridine-4-carboxhydrazide)ylidenemethyl-pyrazol-1-yl]-[1,8]naphthyridine-4(1H)- Ketone-3-carboxylic acid (VI) and 0.4g (4.0mmol) of anhydrous methylpiperazine were added to 20ml of anhydrous acetonitrile for reflux reaction for 15h, and left overnight; the resulting solid was collected by filtratio...
Embodiment 3
[0059] The 7-(piperazine-substituted pyrazole aldehyde isoniazid hydrazone) flunalidinone carboxylic acid derivative of this embodiment is 1-cyclopropyl-6-fluoro-7-[3-methyl-4-( Pyridine-4-carbohydrazino)ylidenemethyl-5-(4-ethylpiperazin-1-yl)-pyrazol-1-yl]-[1,8]naphthyridin-4(1H)-one -3-carboxylic acid, its chemical structural formula is:
[0060]
[0061] That is, R in formula (I) 1 is ethyl, R 2 for a hydrogen atom.
[0062] The preparation method of the 7-(piperazine-substituted pyrazole aldehyde isoniazid hydrazone) flunalidinone carboxylic acid derivative of the present embodiment is as follows: take 1.0 g (2.0 mmol) of 1-cyclopropyl-6-fluoro -7-[3-Methyl-5-chloro-4-(pyridine-4-carboxhydrazide)ylidenemethyl-pyrazol-1-yl]-[1,8]naphthyridine-4(1H)- Ketone-3-carboxylic acid (VI) and 0.46g (4.0mmol) of anhydrous ethylpiperazine were added to 20ml of anhydrous acetonitrile for reflux reaction for 24h, and left overnight; the resulting solid was collected by filtration ...
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