ChemicalBook CAS DataBase List Moxifloxacin

Moxifloxacin synthesis

9synthesis methods

Product Name:Moxifloxacin
CAS Number:151096-09-2
Molecular formula:C21H24FN3O4
Molecular Weight:401.43

1-Cyclopropyl-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid

112811-72-0
319 suppliers
$9.00/5g

151213-40-0 Synthesis

151213-40-0
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$23.00/250mg

151096-09-2
306 suppliers
$13.00/100mg

Yield:151096-09-2 96%

Reaction Conditions:

with [BCl₂(4-picoline)][AlCl₄];triethylamine in methanol at 85; for 6 h;Catalytic behavior;Reagent/catalyst;Solvent;Temperature;

Steps:

1-5 Example 5

Add 1-cyclopropyl-6,7-difluoro-8-methoxy-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid (60g, 0.2mol) into a 500mL three-necked flask,Add 300mL methanol, and then add (S,S)-2,8-diazabicyclo[4.3.0]nonane (50.4g, 0.4mol),14mL of triethylamine and 1.2g of [BCl2(4pic)][AlCl4], stir mechanically until it is clear.After the addition is complete, the reaction solution is heated to 85°C for reaction.After TLC monitoring until the consumption of 1-cyclopropyl-6,7-difluoro-8-methoxy-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid is complete, the reaction time is 6 hour,The reaction solution was cooled to room temperature, most of the solvent was evaporated under reduced pressure, the temperature of the system was slowly cooled to about 10°C, and the moxifloxacin monomer was precipitated.Filter, wash twice with methanol at the dosage of 10ml each time, wash twice with deionized water at the dosage of 15ml each time, and dry in vacuum.Moxifloxacin powdery solid 77g was obtained, the yield was 96%, and the purity was 99.8% as measured by HPLC area normalization method.1-cyclopropyl-6-{(S,S)-2,8-diazo-bicyclo[4.3.0]non-8-yl}-7-fluoro-8-methoxy-1,4-Dihydro-4-oxo-3-quinolinecarboxylic acid (C6-F substituted by-product) was not detected

References:

CN112759590,2021,A Location in patent:Paragraph 0029-0038