Thionyl Chloride → N-(2,6-Difluoro-3-hydroxy-phenyl)-5-(3-fluorophenyl)-2-methoxy-3-methyl-benzamide

Participants

Reaction Conditions

Reaction Steps

To 5-(3-fluorophenyl)-2-methoxy-3-methyl-benzoic acid (1.09 g, 4.19 mmol, 1.1 eq) was added SOCl2 (10 mL, 12.6 mmol, 3.0 eq). The reaction was heated to 70° C. and stirred for 6 h, then the solvent was removed. The residue obtained was dissolved in THF (10 mL) and added to a mixture of 3-amino-2,4-difluorophenol (intermediate X(a)) (0.405 g, 2.8 mmol, 1.0 eq) and NaHCO3 (1.17 g, 13.9 mmol, 5 eq) in THF (8 mL) at 0° C. The reaction was warmed to room temperature, stirred for 2 h then quenched by addition of water. The aqueous layer was extracted with EtOAc and the combined organic extracts were washed with water and brine dried (Na2SO4) and evaporated in vacuo. The crude residue obtained was purified by column chromatography (petroleum ether:EtOAc 1:0 to 10:1) to give the title compound as a white solid (209 mg, 19%).

Provenance & Evidence