127199-27-3

Usage

Uses

Used in Pharmaceutical Industry:
3-Quinolinecarboxylic acid, 8-chloro-6,7-difluoro-1-[(1R,2S)-2-fluorocyclopropyl]-1,4-dihydro-4-oxois used as a pharmaceutical compound for its potential biological activities and drug development purposes. Its unique molecular structure and properties make it a promising candidate for the discovery and development of new therapeutic agents.
Used in Medicinal Chemistry:
In the field of medicinal chemistry, 3-Quinolinecarboxylic acid, 8-chloro-6,7-difluoro-1-[(1R,2S)-2-fluorocyclopropyl]-1,4-dihydro-4-oxois utilized for its potential to contribute to the design and synthesis of novel drugs. Its unique features can be leveraged to create new molecules with improved pharmacological properties, enhancing their efficacy and selectivity in treating various diseases and conditions.

Upstream product

• 127199-25-1 8-chloro-6,7-difluoro-1-[(1R,2S)-2-fluorocyclopropyl]-4-oxo-1,4-dihydroquinoline-3-carboxylic acid ethyl ester 
• 101987-86-4 ethyl β-(3-chloro-2,4,5-trifluorophenyl)-β-oxopropionate 

Downstream Products

• 127199-06-8 7-((R)-7-Amino-5-aza-spiro[2.4]hept-5-yl)-8-chloro-6-fluoro-1-((1R,2S)-2-fluoro-cyclopropyl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid 
• 127254-12-0 sitafloxacin 

Relevant academic research and scientific papers

Synthesis and characterization of sitafloxacin

The convenient protocol for the synthesis of sitafloxacin is described. Reaction of ethyl 3-(3-choloro-2,4,5-trifluorophenyl)-3-oxopropanoate with triethylorthoformate and (1R,2S)-(-)-cis-1,2 fluorine cyclopropane amino-p-toluene sulfonic acid salt by condensation under sodium hydrogen condition. The reaction mixture take place hydrolysis of ester in hydrochloric acid solution. Subsequence reacted with (S)-N[(oxoboryl) methylene] -5-azaspiro[2,4]heptan-7-amine by condensation. In the end taken off the protection group gives sitafloxacin and total conversion about 52-65%. The structure of sitafloxacin was characterized by 1H NMR, 13C NMR, IR, MS and elemental analysis.

(Fluorocyclopropyl)quinolones. 2. Synthesis and stereochemical structure- activity relationships of chiral 7-(7-amino-5-azaspiro[2.4]heptan-5-yl)-1- (2-fluorocyclopropyl)quinolone antibacterial agents

A series of novel chiral 7-(7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro- 1-(2-fluorocyclopropyl)-quinolones were synthesized as a continuation of a research project of 1-(2-fluorocyclopropyl)-quinolones by considering stereochemical and physicochemical properties of the molecule. Absolute configurations of the 1-(cis-2-fluorocyclopropyl) moiety and the 7-(7-amino- 5-azaspiro-[2.4]heptan-5-yl) moiety were determined by X-ray crystallographic analysis. Stereochemical structure-activity relationship studies indicated that 1-[(1R,2S)-2-fluorocyclopropyl] and 7-[(7S)-amino-5-azaspiro[2.4]heptan- 5-yl] derivatives are more potent against Gram-positive and Gram-negative bacteria than the other stereoisomers and 7-[(7S)-7-amino-5-azaspiro[2.4]- heptan-5-yl]-8-chloro-1-[(1R,2S)-2-fluorocyclopropyl]quinolone (33) is the most potent of all stereoisomers. Pharmacokinetic profiles and physicochemical properties of the selected compounds were also examined, and it was found that 33 (DU-6859a) possesses moderate lipophilicity and good pharmacokinetic profiles.