Tetrahydrofuran → HCID 178522853, compound

Participants

Reaction Steps

To a flask containing 3-{[(4-chlorobenzyl)amino]carbonyl}-8-fluoro-4-hydroxy-6-quinolinecarboxylic acid from Preparation No. 24 (0.11 g) and THF (3 mL) is added thionyl chloride (0.075 mL). The reaction mixture is stirred overnight then treated with one drop of DMF. After 4 hours, the reaction is concentrated under reduced pressure. The residue is triturated with toluene (2×) and dried in vacuo to afford a light yellow solid. The solid is dissolved in pyridine (2 mL), treated with p-chlorobenzylamine (0.04 mL), and a small amount of 4-dimethylaminopyridine is added. After stirring overinght, the reaction is concentrated under reduced pressure. The residue is triturated with toluene (3×) and dried in vacuo. The residue is adsorbed onto silica and chromatographed on silica eluting with 2% MeOH:CH2Cl2 to 6% MeOH:CH2Cl2. The product-containing fractions are evaporated to give a solid which is crystallized from methanol:toluene to afford 0.04 g of the title compound.

Provenance & Evidence