Propionyl chloride → 3-[6-Chloro-1-(5-ethyl-1,2,4-oxadiazol-3-yl)-7-fluoro-2-methyl-1H-indol-3-ylsulfanyl]-benzoic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

Propionyl chloride (0.042 mL, 0.48 mmol) was added to a solution of 3-[6-Chloro-7-fluoro-1-(N-hydroxycarbamimidoyl)-2-methyl-1H-indol-3-ylsulfanyl]-benzoic acid ethyl ester (0.12 g, 0.24 mmol) in pyridine (2 mL) at room temperature. The resulting mixture was heated to 80° C. and stirred for overnight, then cooled to room temeperature and subjected to standard aqueous workup. The crude residue was purified on silica gel (0-60% EtOAc in hexanes) to afford the title compound.

Provenance & Evidence