Formic Acid → HCID 11684746, compound

Participants

Reaction Steps

To 2-[(4-{2-[3-(2,4-difluorophenyl)-1-heptylureido]ethyl}-1,3-thiazol-2-yl)thio]-2-methylpropionic acid tert-butyl ester (0.67 g) obtained in Example 319-1 was added formic acid (10 mL), and the mixture was stirred at room temperature overnight, stirred at 50° C. for 3 hr and further stirred at 70° C. for 4 hr. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate, washed with saturated brine, and dried over sodium sulfate. The solvent was evaporated under reduced pressure and the obtained residue was purified by silica gel chromatography (elution solvent hexane-ethyl acetate=1:1) to give the title compound (0.55 g) as a pale-brown oil.

Provenance & Evidence