CN114539213A - Fluoroquinolone compound and preparation method and application thereof - Google Patents

Fluoroquinolone compound and preparation method and application thereof Download PDF

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CN114539213A
CN114539213A CN202210177192.8A CN202210177192A CN114539213A CN 114539213 A CN114539213 A CN 114539213A CN 202210177192 A CN202210177192 A CN 202210177192A CN 114539213 A CN114539213 A CN 114539213A
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叶金星
孙茂林
梁超茗
李涛
程瑞华
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Guangdong University of Technology
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Abstract

The fluoroquinolone compound disclosed by the invention is wide in antibacterial spectrum and has very good inhibitory or bactericidal activity, so that the fluoroquinolone compound has a good application prospect.

Description

Fluoroquinolone compound and preparation method and application thereof
Technical Field
The invention relates to a fluoroquinolone compound and a preparation method and application thereof.
Background
Quinolones are compounds with aromatic ring structure skeletons such as pyridone acid biphenyl or pyridine. Quinolone antibiotics, which contain a 4-quinolone bicyclic core structure, are generally considered nalidixic acid, a by-product unexpectedly found in the synthesis of chloroquine, an antimalarial compound. In 1962, Lescher found that nalidixic acid had moderate activity against various gram-negative bacilli. In the last 70-80 years, the discovery of fluoroquinolones promoted the rapid development of quinolones and made them exhibit a broader spectrum of activity and better pharmacokinetics than the first generation of quinolones. Fluoroquinolones, such as ciprofloxacin and ofloxacin, not only have effects on gram-negative bacteria and gram-positive bacteria, but also can inhibit mycobacterium tuberculosis. After more than 50 years of development, fluoroquinolone antibiotics become the first-line anti-infective chemotherapeutic medicine with broad spectrum, high efficiency and low toxicity which is clinically most widely used at present after cephalosporin. However, with the widespread use and even abuse of such drugs, bacterial resistance has increased year by year and has become a troublesome problem worldwide. Even the problem of limited use (resistance limitation) of antibiotics arises. Therefore, the development of more characteristic excellent fluoroquinolone antibacterial agents is imperative.
Delafloxacin (Delafloxacin) is the latest generation of broad-spectrum fluoroquinolone antibacterial Drugs developed by Wakunaga pharmaceutical company in japan and Melinta bio usa, and was approved by the FDA for the treatment of acute bacterial skin and skin structure infections in 2017 (Expert Opinion on Investigational Drugs 2015,24, 433-488; Infection and Drug Resistance 2018,11, 479-488). The chemical name of delafloxacin is 1- (6-amino-3, 5-difluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxy-1-azetidinyl) -4-oxo-3-quinolinecarboxylic acid, and the chemical structure of delafloxacin is different from that of most other fluoroquinolone medicaments, and is mainly represented by the following 3 points: 1) the compound lacks strong basic groups at the C-7 position, so that the compound is weakly acidic, and the antibacterial activity in a weakly acidic environment can be enhanced; 2) c-8 chlorine (consistent with C-6 fluorine) can generate strong electron-withdrawing effect on aromatic rings, which is helpful for improving the stability of the molecules; 3) the presence of a 6-amino-3, 5-difluoro-2-pyridinyl substitution at the N-1 position allows the formation of a larger molecular surface than other fluoroquinolones (Annals of Clinical Microbiology and antibiotics, 2016,15, 34.). Clinical research shows that compared with other quinolone drugs, delafloxacin has a wider antibacterial spectrum and a better antibacterial effect, and particularly has an increased antibacterial property on gram-positive bacteria, so that delafloxacin has strong competitiveness in the future antibacterial drug market and can be used for treating various diseases.
Disclosure of Invention
The invention provides a series of unreported quinolone compounds with wide antibacterial spectrum, strong antibacterial activity and low toxic and side effects, a preparation method and application thereof by modifying the structure of the fluoroquinolone drug delafloxacin on the background, and the quinolone compounds show good results in antibacterial activity tests.
In order to realize the purpose, the technical scheme is as follows: a fluoroquinolone compound represented by formula (I), or a salt or hydrate thereof:
Figure BDA0003519400870000021
wherein R is1、R2、R3、R4Respectively is one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, C5-C6 cycloalkyl, C1-C6 alkyloxy, C1-C6 hydroxyalkylene, C1-C6 alkylmercapto, C1-C6 mercaptoalkylene, C1-C6 alkylamino, halogen, hydroxy, mercapto, cyano, nitro, trifluoromethyl, trifluoromethoxy, difluoromethyl, difluoromethoxy, fluoromethyl and fluoromethoxy; r5Is C1-C4 alkoxy, halogenated C1-C4 alkoxy, NRbRcOr a multiple heterocyclic group.
Preferably, said R is1、R2、R3、R4Respectively is one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen, hydroxyl, sulfydryl, cyano-group, nitryl, trifluoromethyl, trifluoromethoxy, difluoromethyl and difluoromethoxy; the R is5Is NRbRcOr a multiple heterocyclic group.
Preferably, said R is1、R2、R3、R4Respectively is one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen, hydroxyl, sulfydryl, cyano-group, nitryl, trifluoromethyl, trifluoromethoxy, difluoromethyl and difluoromethoxy; the R is5Is NH (CH)3)、NH(CH2CH2CH3)、NH(CH2CH2CH2CH3)、N(CH2CH2CH3)2、N(CH3)(CH2CH3)、N(CH3)(CH2CH2CH3)、N(CH3)(CH2CH2CH2CH3)、N(CH2CH3)(CH2CH2CH3)、N(CH2CH3)(CH2CH2CH2CH3)、
Figure BDA0003519400870000031
Or a multiple heterocyclic group.
Preferably, said R is1、R2、R3、R4Respectively one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen, hydroxyl, sulfydryl, cyano-group, nitro-group, trifluoromethyl, trifluoromethoxy, difluoromethyl and difluoromethoxy; the R is5Is composed of
Figure BDA0003519400870000032
Figure BDA0003519400870000033
Preferably, the fluoroquinolone compound is selected from:
compound 1
Figure BDA0003519400870000034
1- (2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopropyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 2
Figure BDA0003519400870000035
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclobutyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 3
Figure BDA0003519400870000041
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-pyrrolidinyl-4-oxo-3-quinolinecarboxylic acid,
compound 4
Figure BDA0003519400870000042
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 5
Figure BDA0003519400870000043
1- (6-methyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-cyclobutylamino-4-oxo-3-quinolinecarboxylic acid,
compound 6
Figure BDA0003519400870000044
1- (6-methyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 7
Figure BDA0003519400870000051
1- (5-ethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopentyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 8
Figure BDA0003519400870000052
1- (5-ethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-cyclopentylamino-4-oxo-3-quinolinecarboxylic acid,
compound 9
Figure BDA0003519400870000053
1- (4-methoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclohexyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 10
Figure BDA0003519400870000054
1- (4-methoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 11
Figure BDA0003519400870000061
1- (3, 5-dimethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 12
Figure BDA0003519400870000062
1- (3-bromo-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (4-methylpiperazinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 13
Figure BDA0003519400870000063
1- (3-bromo-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 14
Figure BDA0003519400870000064
1- (4-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 15
Figure BDA0003519400870000071
1- (4-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-methylpiperazin-1-yl) -4-oxo-3-quinolinecarboxylic acid,
compound 16
Figure BDA0003519400870000072
1- (5-chloro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3, 5-dimethylpiperazin-1-yl) -4-oxo-3-quinolinecarboxylic acid,
compound 17
Figure BDA0003519400870000073
1- (5-chloro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-morpholine-4-oxo-3-quinolinecarboxylic acid,
compound 18
Figure BDA0003519400870000074
1- (6-hydroxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 19
Figure BDA0003519400870000081
1- (6-hydroxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-thiomorpholine-4-oxo-3-quinolinecarboxylic acid,
compound 20
Figure BDA0003519400870000082
1- (6-mercapto-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 21
Figure BDA0003519400870000083
1- (6-mercapto-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperidinyl-4-oxo-3-quinolinecarboxylic acid,
compound 22
Figure BDA0003519400870000084
1- (3-cyano-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 23
Figure BDA0003519400870000091
1- (3-cyano-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-pyrrolidinyl-4-oxo-3-quinolinecarboxylic acid,
compound 24
Figure BDA0003519400870000092
1- (4-nitro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 25
Figure BDA0003519400870000093
1- (4-nitro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxypyrrolidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 26
Figure BDA0003519400870000094
1- (4-trifluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 27
Figure BDA0003519400870000101
1- (4-trifluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-aminopyrrolidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 28
Figure BDA0003519400870000102
1- (5-trifluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxyazetidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 29
Figure BDA0003519400870000103
1- (5-trifluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-aminoazetidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 30
Figure BDA0003519400870000104
1- (6-difluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 31
Figure BDA0003519400870000111
1- (4-difluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 32
Figure BDA0003519400870000112
1- (3-iodo-5-bromo-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 33
Figure BDA0003519400870000113
1- (3-nitro-6-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 34
Figure BDA0003519400870000114
1- (2-quinolinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid.
Preferably, the salt is formed by the fluoroquinolone compound and acid, and the acid is hydrochloric acid, sulfuric acid, hydrobromic acid, phosphoric acid, acetic acid, citric acid, oxalic acid, tartaric acid, benzoic acid or malic acid.
Preferably, the number of crystal water of the hydrate is any real number from 0 to 16.
The invention provides a preparation method of the fluoroquinolone compound, which comprises the following steps:
performing addition coupling reaction on 3-chloro-2, 4, 5-trifluorobenzoyl chloride and N, N-dimethylamino ethyl acrylate, performing substitution reaction on the obtained product with substituted 2-aminopyridine, performing cyclization through intramolecular nucleophilic substitution, hydrolyzing to obtain a compound V, and performing aromatic nucleophilic substitution reaction on the compound V and secondary amine to obtain the fluoroquinolone compound; the reaction formula of the preparation method is as follows:
Figure BDA0003519400870000121
the invention provides a pharmaceutical composition, which comprises the fluoroquinolone compound or the salt or hydrate thereof and a pharmaceutically acceptable carrier.
The invention provides an application of the fluoroquinolone compound or the salt or hydrate thereof or the pharmaceutical composition in preparing antibacterial drugs.
Has the advantages that:
the fluoroquinolone compound disclosed by the invention is wide in antibacterial spectrum and has very good inhibitory or bactericidal activity, so that the fluoroquinolone compound has a good application prospect.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1: preparation of 1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopropyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid (compound 1):
a) ethyl N, N-dimethylaminoacrylate (3.1g,24.0mmol), triethylamine (2.6g,26.2mmol) and toluene (40mL) were mixed, a mixed solution of 3-chloro-2, 4, 5-trifluorobenzoyl chloride (5g,21.8mmol) and toluene (20mL) was added dropwise, heated to 50 ℃ and concentrated after TLC monitoring for about 1 hour to complete the reaction, yielding 7.3g of compound II in 99% yield. LC/MS [ M + H ]]+=336.05、[M+Na]+=358.08、[M+K]+=374.04。
b) Mixing the compound II (7g,20.8mmol), ethanol (70mL) and glacial acetic acid (3mL), dropwise adding an ethanol solution of 2-aminopyridine (2.1g,22.8mmol) at room temperature, heating to 40 ℃ after dropwise adding, cooling after TLC monitoring reaction, slowly adding a proper amount of water into the reaction liquid, stirring and filtering, and drying to obtain 7.6g of the compound III with the yield of 95%. LC/MS [ M + H ]]+=385.05、[M+Na]+=407.06、[M+K]+=423.05。
c) Compound III (7.6g,19.7mmol), anhydrous potassium carbonate (4.1g,29.6mmol), and N, N-dimethylformamide (50mL) were mixed, heated to 90 ℃ and stirred for 2 hours, after completion of the TLC monitoring reaction, cooled, and the reaction mixture was slowly added with an appropriate amount of water, stirred, filtered, and dried to give compound IV 6.9g, with a yield of 96%. LC/MS [ M + H ]]+=365.04、[M+Na]+=387.06、[M+K]+=403.04。
d) Compound IV (6.9g,18.9mmol), acetic acid (20mL), 6M HCl (4mL) were mixed, heated to 90-95 ℃ for reflux reaction for 4 hours, TLC monitored the completion of the reaction, cooled, added a suitable amount of water slowly to the reaction solution, stirred and filtered, the filter cake was washed with water to neutrality, and dried to give compound V6.0 g, yield 94%. LC/MS [ M + H ]]+=337.01、[M+Na]+=359.03、[M+K]+=375.04。
e) Compound V (1.7g, 5.0mmol) is added to a suspension of N-methylcyclopropylamine (0.5g, 7.5mmol), triethylamine (1.0g, 10.0mmol) and acetonitrile (20mL), and the mixture is then refluxed until the absence of starting material is detected by TLC (typically 5-8 hours). The solution was cooled to room temperature and filtered, and the filter cake was washed with water and ether to give the crude product. Followed by recrystallizationAfter purification (DMF/EtOH), the desired product, 1.1g, 56% yield, 1- (2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopropyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid, was obtained. LC/MS [ M + H ]]+=388.08、[M+Na]+=410.05、[M+K]+=426.01。
Example 2: preparation of 1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclobutyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid (compound 2):
compound V (1.7g, 5.0mmol) is added to a suspension of N-methylcyclopropylamine (0.6g, 7.5mmol), triethylamine (1.0g, 10.0mmol) and acetonitrile (20mL), and the mixture is then refluxed until the absence of starting material is detected by TLC (typically 5-8 hours). The solution was cooled to room temperature and filtered, and the filter cake was washed with water and ether to give the crude product. Subsequent purification by recrystallization (DMF/EtOH) gave the desired product 1- (2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclobutyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid in 1.2g, 60% yield. LC/MS [ M + H ]]+=402.08、[M+Na]+=424.09、[M+K]+=440.06。
Example 3: preparation of 1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-pyrrolidinyl-4-oxo-3-quinolinecarboxylic acid (compound 3):
compound V (1.7g, 5.0mmol) was added to a suspension of tetrahydropyrrole (0.5g, 7.5mmol), triethylamine (1.0g, 10.0mmol) and acetonitrile (20mL), and the mixture was refluxed until no starting material was present as detected by TLC (typically 5-8 hours). The solution was cooled to room temperature and filtered, and the filter cake was washed with water and ether to give the crude product. Subsequent purification by recrystallization (DMF/EtOH) gave the desired product 1- (2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclobutyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid in 1.0g, 53% yield. LC/MS [ M + H ]]+=388.08、[M+Na]+=410.05、[M+K]+=426.08。
Example 4: preparation of 1- (2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (Compound 4):
compound V (1.7g, 5.0mmol) was added to a suspension of anhydrous piperazine (0.6g, 7.5mmol), triethylamine (1.0g, 10.0mmol) and acetonitrile (20mL)The mixture is then refluxed until the absence of starting material is detected by TLC (typically 5-8 hours). The solution was cooled to room temperature and filtered, and the filter cake was washed with water and ether to give the crude product. Subsequent purification by recrystallization (DMF/EtOH) gave the desired product 1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclobutyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid in 1.3g, 65% yield. LC/MS [ M + H ]]+=403.09、[M+Na]+=425.08、[M+K]+=441.09。
Example 5: preparation of 1- (6-methyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-cyclobutylamino-4-oxo-3-quinolinecarboxylic acid (Compound 5):
compound 5 was prepared in 62% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=403.09、[M+Na]+=425.08、[M+K]+=441.09。
Example 6: preparation of 1- (6-methyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (Compound 6):
compound 6 was prepared in 58% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=417.11、[M+Na]+=439.10、[M+K]+=455.11。
Example 7: preparation of 1- (5-ethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopentyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid (compound 7):
compound 7 was prepared in 49% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=444.14、[M+Na]+=466.13、[M+K]+=482.11。
Example 8: preparation of 1- (5-ethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-cyclopentylamino-4-oxo-3-quinolinecarboxylic acid (compound 8):
compound 8 was prepared in 53% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=430.13、[M+Na]+=452.15、[M+K]+=468.13。
Example 9: preparation of 1- (4-methoxy-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclohexyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid (Compound 9):
compound 9 was prepared in the same manner as in example 1 with the exception of using the corresponding starting material in 56% yield. LC/MS [ M + H ]]+=460.14、[M+Na]+=482.14、[M+K]+=498.14。
Example 10: preparation of 1- (4-methoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (Compound 10):
compound 10 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 63%. LC/MS [ M + H ]]+=433.09、[M+Na]+=435.10、[M+K]+=471.10。
Example 11: preparation of 1- (3, 5-dimethyl-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (Compound 11):
compound 11 was prepared in 60% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=431.11、[M+Na]+=453.12、[M+K]+=469.12。
Example 12: preparation of 1- (3-bromo-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (4-methylpiperazinyl) -4-oxo-3-quinolinecarboxylic acid (compound 12):
compound 12 was prepared in 58% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=495.02、[M+Na]+=517.02、[M+K]+=533.02。
Example 13: preparation of 1- (3-bromo-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 13):
compound 13 was prepared in 55% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=481.00、[M+Na]+=503.00、[M+K]+=519.01。
Example 14: preparation of 1- (4-fluoro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 14):
compound 14 was prepared in the same manner as in example 1 with the exception of using the corresponding starting material in a yield of 63%. LC/MS [ M + H ]]+=421.08、[M+Na]+=443.08、[M+K]+=459.09。
Example 15: preparation of 1- (4-fluoro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-methylpiperazin-1-yl) -4-oxo-3-quinolinecarboxylic acid (compound 15):
compound 15 was prepared in 55% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=435.10、[M+Na]+=457.09、[M+K]+=473.10。
Example 16: preparation of 1- (5-chloro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3, 5-dimethylpiperazin-1-yl) -4-oxo-3-quinolinecarboxylic acid (compound 16):
compound 16 was prepared in 48% yield in the same manner as in example 1, except that the corresponding starting materials were used. LC/MS [ M + H ]]+=465.09、[M+Na]+=487.08、[M+K]+=503.08。
Example 17: preparation of 1- (5-chloro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-morpholine-4-oxo-3-quinolinecarboxylic acid (compound 17):
compound 17 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 57%. LC/MS [ M + H ]]+=438.03、[M+Na]+=460.03、[M+K]+=476.03。
Example 18: preparation of 1- (6-hydroxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 18):
compound 18 was prepared in 44% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=419.08、[M+Na]+=441.09、[M+K]+=457.08。
Example 19: preparation of 1- (6-hydroxy-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-thiomorpholine-4-oxo-3-quinolinecarboxylic acid (Compound 19):
compound 19 was prepared in 46% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=436.05、[M+Na]+=458.05、[M+K]+=474.04。
Example 20: preparation of 1- (6-mercapto-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 20):
compound 21 was prepared in 43% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=435.06、[M+Na]+=457.06、[M+K]+=473.06。
Example 21: preparation of 1- (6-mercapto-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperidinyl-4-oxo-3-quinolinecarboxylic acid (compound 21):
compound 21 was prepared in the same manner as in example 1, with a yield of 48%, except that the corresponding starting material was used. LC/MS [ M + H ]]+=434.07、[M+Na]+=456.08、[M+K]+=472.07。
Example 22: preparation of 1- (3-cyano-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 22):
compound 22 was prepared in the same manner as in example 1 with a yield of 56% except that the corresponding starting material was used. LC/MS [ M + H ]]+=429.08、[M+Na]+=450.08、[M+K]+=466.08。
Example 23: preparation of 1- (3-cyano-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-pyrrolidinyl-4-oxo-3-quinolinecarboxylic acid (compound 23):
compound 23 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 59%. LC/MS [ M + H ]]+=413.07、[M+Na]+=435.08、[M+K]+=451.07。
Example 24: preparation of 1- (4-nitro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 24):
compound 24 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 64%. LC/MS [ M + H ]]+=448.09、[M+Na]+=470.07、[M+K]+=486.07。
Example 25: preparation of 1- (4-nitro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxypyrrolidinyl) -4-oxo-3-quinolinecarboxylic acid (compound 25):
compound 25 was prepared in 53% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=449.06、[M+Na]+=471.06、[M+K]+=487.05。
Example 26: preparation of 1- (4-trifluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 26):
compound 26 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 60%. LC/MS [ M + H ]]+=471.09、[M+Na]+=493.08、[M+K]+=509.08。
Example 27: preparation of 1- (4-trifluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-aminopyrrolidinyl) -4-oxo-3-quinolinecarboxylic acid (compound 27):
compound 27 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in 44% yield. LC/MS [ M + H ]]+=471.08、[M+Na]+=493.09、[M+K]+=509.08。
Example 28: preparation of 1- (5-trifluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxyazetidinyl) -4-oxo-3-quinolinecarboxylic acid (compound 28):
compound 28 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 41%. LC/MS [ M + H ]]+=474.05、[M+Na]+=496.04、[M+K]+=512.05。
Example 29: preparation of 1- (5-trifluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-aminoazetidinyl) -4-oxo-3-quinolinecarboxylic acid (compound 29):
compound 29 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 40%. LC/MS [ M + H ]]+=473.06、[M+Na]+=495.06、[M+K]+=511.06。
Example 30: preparation of 1- (6-difluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 30):
compound 30 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in a yield of 63%. LC/MS [ M + H ]]+=453.09、[M+Na]+=475.06、[M+K]+=491.09。
Example 31: preparation of 1- (4-difluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 31):
compound 31 was prepared in 54% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=469.09、[M+Na]+=491.08、[M+K]+=507.10。
Example 32: preparation of 1- (3-iodo-5-bromo-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 32):
compound 32 was prepared in 58% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=606.89、[M+Na]+=628.90、[M+K]+=644.90。
Example 33: preparation of 1- (3-nitro-6-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (compound 33):
compound 33 was prepared in 66% yield in the same manner as in example 1, except that the corresponding starting material was used. LC/MS [ M + H ]]+=466.07、[M+Na]+=488.07、[M+K]+=504.05。
Example 34: preparation of 1- (2-quinolyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid (Compound 34):
compound 34 was prepared in the same manner as in example 1, except that the corresponding starting material was used, in 51% yield. LC/MS [ M + H ]]+=453.09、[M+Na]+=475.11、[M+K]+=491.12。
Example 35: antibacterial Activity test of Compounds of the present invention
To clarify the utility of the synthesized compounds, the minimum inhibitory concentrations (MIcs) of some target compounds were determined by the agar dilution method according to the CLSI standard. The experimental medium is Mueller. Hinton agar, and the culture plate is cultured for 18-24 h at 35 ℃. Specific results of the specific antimicrobial activity test are shown in table 1:
TABLE 1 in vitro antibacterial Activity of Compounds of the invention
Figure BDA0003519400870000191
Figure BDA0003519400870000201
Experimental results show that the compounds contained in the chemical structural general formula I generally have strong antibacterial activity.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A fluoroquinolone compound represented by formula (I), or a salt or hydrate thereof:
Figure FDA0003519400860000011
wherein R is1、R2、R3、R4Respectively is one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, C5-C6 cycloalkyl, C1-C6 alkyloxy, C1-C6 hydroxyalkylene, C1-C6 alkylmercapto, C1-C6 mercaptoalkylene, C1-C6 alkylamino, halogen, hydroxy, mercapto, cyano, nitro, trifluoromethyl, trifluoromethoxy, difluoromethyl, difluoromethoxy, fluoromethyl and fluoromethoxy; r5Is C1-C4 alkoxy, halogenated C1-C4 alkoxy, NRbRcOr a multiple heterocyclic group.
2. The fluoroquinolone compound or the salt or hydrate thereof according to claim 1, wherein R is1、R2、R3、R4Respectively is one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen, hydroxyl, sulfydryl, cyano-group, nitryl, trifluoromethyl, trifluoromethoxy, difluoromethyl and difluoromethoxy; the R is5Is NRbRcOr a multiple heterocyclic group.
3. The fluoroquinolone compound or the salt or hydrate thereof according to claim 1 or 2, wherein R is1、R2、R3、R4Respectively is one of hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen, hydroxyl, sulfydryl, cyano-group, nitryl, trifluoromethyl, trifluoromethoxy, difluoromethyl and difluoromethoxy; the R is5Is NH (CH)3)、NH(CH2CH2CH3)、NH(CH2CH2CH2CH3)、N(CH2CH2CH3)2、N(CH3)(CH2CH3)、N(CH3)(CH2CH2CH3)、N(CH3)(CH2CH2CH2CH3)、N(CH2CH3)(CH2CH2CH3)、N(CH2CH3)(CH2CH2CH2CH3)、
Figure FDA0003519400860000012
Or a multiple heterocyclic group.
4. A fluoroquinolone compound or a salt or hydrate thereof according to any one of claims 1 to 3, wherein R is1、R2、R3、R4Respectively are hydrogen, C1-C6 alkyl, C1-C6 alkoxy, halogen, hydroxyl, sulfydryl, cyano,One of nitro, trifluoromethyl, trifluoromethoxy, difluoromethyl and difluoromethoxy; the R is5Is composed of
Figure FDA0003519400860000021
Figure FDA0003519400860000022
5. A fluoroquinolone compound, or a salt or hydrate thereof, according to any one of claims 1 to 3, wherein said fluoroquinolone compound is selected from the group consisting of:
compound 1
Figure FDA0003519400860000023
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopropyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 2
Figure FDA0003519400860000024
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclobutyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 3
Figure FDA0003519400860000025
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-pyrrolidinyl-4-oxo-3-quinolinecarboxylic acid,
compound 4
Figure FDA0003519400860000031
1- (2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 5
Figure FDA0003519400860000032
1- (6-methyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-cyclobutylamino-4-oxo-3-quinolinecarboxylic acid,
compound 6
Figure FDA0003519400860000033
1- (6-methyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 7
Figure FDA0003519400860000034
1- (5-ethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclopentyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 8
Figure FDA0003519400860000041
1- (5-ethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-cyclopentylamino-4-oxo-3-quinolinecarboxylic acid,
compound 9
Figure FDA0003519400860000042
1- (4-methoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (cyclohexyl (methyl) amino) -4-oxo-3-quinolinecarboxylic acid,
compound 10
Figure FDA0003519400860000043
1- (4-methoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 11
Figure FDA0003519400860000044
1- (3, 5-dimethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 12
Figure FDA0003519400860000051
1- (3-bromo-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (4-methylpiperazinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 13
Figure FDA0003519400860000052
1- (3-bromo-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 14
Figure FDA0003519400860000053
1- (4-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 15
Figure FDA0003519400860000054
1- (4-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-methylpiperazin-1-yl) -4-oxo-3-quinolinecarboxylic acid,
compound 16
Figure FDA0003519400860000061
1- (5-chloro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3, 5-dimethylpiperazin-1-yl) -4-oxo-3-quinolinecarboxylic acid,
compound 17
Figure FDA0003519400860000062
1- (5-chloro-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-morpholine-4-oxo-3-quinolinecarboxylic acid,
compound 18
Figure FDA0003519400860000063
1- (6-hydroxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 19
Figure FDA0003519400860000064
1- (6-hydroxy-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-thiomorpholin-4-oxo-3-quinolinecarboxylic acid,
compound 20
Figure FDA0003519400860000071
1- (6-mercapto-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 21
Figure FDA0003519400860000072
1- (6-mercapto-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperidinyl-4-oxo-3-quinolinecarboxylic acid,
compound 22
Figure FDA0003519400860000073
1- (3-cyano-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 23
Figure FDA0003519400860000074
1- (3-cyano-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-pyrrolidinyl-4-oxo-3-quinolinecarboxylic acid,
compound 24
Figure FDA0003519400860000081
1- (4-nitro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 25
Figure FDA0003519400860000082
1- (4-nitro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxypyrrolidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 26
Figure FDA0003519400860000083
1- (4-trifluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 27
Figure FDA0003519400860000084
1- (4-trifluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-aminopyrrolidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 28
Figure FDA0003519400860000091
1- (5-trifluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-hydroxyazetidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 29
Figure FDA0003519400860000092
1- (5-trifluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7- (3-aminoazetidinyl) -4-oxo-3-quinolinecarboxylic acid,
compound 30
Figure FDA0003519400860000093
1- (6-difluoromethyl-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 31
Figure FDA0003519400860000094
1- (4-difluoromethoxy-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 32
Figure FDA0003519400860000101
1- (3-iodo-5-bromo-2-pyridinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 33
Figure FDA0003519400860000102
1- (3-nitro-6-fluoro-2-pyridyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid,
compound 34
Figure FDA0003519400860000103
1- (2-quinolinyl) -8-chloro-6-fluoro-1, 4-dihydro-7-piperazinyl-4-oxo-3-quinolinecarboxylic acid.
6. A fluoroquinolone compound or a salt or hydrate thereof according to any one of claims 1 to 5, wherein the salt is a salt of the fluoroquinolone compound with an acid selected from the group consisting of hydrochloric acid, sulfuric acid, hydrobromic acid, phosphoric acid, acetic acid, citric acid, oxalic acid, tartaric acid, benzoic acid and malic acid.
7. The fluoroquinolone compound or the salt or hydrate thereof according to any one of claims 1 to 5, wherein the hydrate has a real number of water of crystallization from 0 to 16.
8. A process for the preparation of a fluoroquinolone compound according to any one of claims 1 to 7, comprising the steps of:
performing addition coupling reaction on 3-chloro-2, 4, 5-trifluorobenzoyl chloride and N, N-dimethylamino ethyl acrylate, performing substitution reaction on the obtained product with substituted 2-aminopyridine, performing cyclization through intramolecular nucleophilic substitution, hydrolyzing to obtain a compound V, and performing aromatic nucleophilic substitution reaction on the compound V and secondary amine to obtain the fluoroquinolone compound; the reaction equation of the preparation method is as follows:
Figure FDA0003519400860000111
9. a pharmaceutical composition comprising a fluoroquinolone compound or salt or hydrate thereof according to any one of claims 1 to 7 and a pharmaceutically acceptable carrier.
10. Use of a fluoroquinolone compound or a salt or hydrate thereof according to any one of claims 1 to 7 or a pharmaceutical composition according to claim 9 for the preparation of an antibacterial medicament.
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US6136823A (en) * 1996-11-28 2000-10-24 Wakunaga Pharmaceutical Co., Ltd. Pyridonecarboxylic acid derivatives or salts thereof and drugs containing the same as the active ingredient
CN101061109A (en) * 2004-11-17 2007-10-24 湧永制药株式会社 Novel pyridonecarboxylic acid derivatives or salts thereof
CN101792443A (en) * 2010-03-09 2010-08-04 北京欧凯纳斯科技有限公司 Fluoro-carbostyril derivative as well as preparation method and application thereof
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US6136823A (en) * 1996-11-28 2000-10-24 Wakunaga Pharmaceutical Co., Ltd. Pyridonecarboxylic acid derivatives or salts thereof and drugs containing the same as the active ingredient
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