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• 6418-38-8 2,3-difluorophenol 
• 186590-23-8 6-bromo-2,3-difluoro-phenol 
• 1185454-25-4 C₁₄H₁₈BrF₂NO₃ 
• 439948-91-1 (S)-4-Methyl-2,2-dioxo-[1,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester 

Relevant academic research and scientific papers

Discovery and Optimization of DNA Gyrase and Topoisomerase IV Inhibitors with Potent Activity against Fluoroquinolone-Resistant Gram-Positive Bacteria

Herein, we describe the discovery and optimization of a novel series that inhibits bacterial DNA gyrase and topoisomerase IV via binding to, and stabilization of, DNA cleavage complexes. Optimization of this series led to the identification of compound 25

TRICYCLIC 2-QUINOLINONES AS ANTIBACTERIALS

This invention is in the field of medicinal chemistry and relates to compounds, and pharmaceutical compositions thereof that are useful as antibacterial agents. The compounds are useful as inhibitors of bacterial gyrase activity and of bacterial infections, and have the structure of Formula (I): as further described herein. The invention further provides pharmaceutical compositions comprising a compound of Formula (I) and methods of using the compounds and compositions to treat bacterial infections.

Stereoselective Access to 1-[2-Bromo(het)aryloxy]propan-2-amines Using Transaminases and Lipases; Development of a Chemoenzymatic Strategy Toward a Levofloxacin Precursor

Two independent enzymatic strategies have been developed toward the synthesis of enantioenriched 1-[2-bromo(het)aryloxy]propan-2-amines. With that purpose a series of racemic amines and prochiral ketones have been synthesized from commercially available 2-bromophenols or brominated pyridine derivatives bearing different pattern substitutions in the aromatic ring. Biotransamination experiments have been studied using ketones as starting materials, yielding both the (R)- and (S)-amine enantiomers with high selectivity (91-99% ee) depending on the transaminase source. In a complementary approach, the classical kinetic resolutions of the racemic amines have been investigated using Candida antarctica lipase type B as biocatalyst. Ethyl methoxyacetate was found as a suitable acyl donor leading to the corresponding (S)-amines (90-99% ee) and (R)-amides (88-99% ee) with high selectivity in most of the cases. A preparative biotransamination process has been developed for the synthesis of (2S)-1-(6-bromo-2,3-difluorophenoxy)propan-2-amine in 61% isolated yield after 24 h, a valuable precursor of the antimicrobial agent Levofloxacin.

A convenient synthesis of chiral amino acid derived 3,4-dihydro-2H-benzo[b][1,4]thiazines and antibiotic levofloxacin

A series of 3,4-dihydro-2H-benzo[b][1,4]thiazine derivatives 8a-g were synthesized via- a copper-catalyzed intramolecular N-aryl amination reaction on substituted 2-(2-bromophenylthio)-ethanamines which were synthesized by the nucleophilic substitution re

Enantiopure 1,4-benzoxazines via 1,2-cyclic sulfamidates. Synthesis of levofloxacin

1,2-Cyclic sulfamidates undergo efficient and regiospecific nucleophilic cleavage with 2-bromophenols (and related anilines and thiophenols), followed by Pd(0)mediated amination to provide an entry to substituted and enantiomerically pure 1,4-benzoxazines (and quinoxalines and 1,4-benzothiazines). This chemistry provides a short and efficient entry to (3S)-3-methyl-1,4-benzoxazine 19, a late stage intermediate in the synthesis of levofloxacin.