Hydrogen chloride-ethyl acetate → 2-[(4-{2-[[(5-chloro-1H-indol-2-yl)carbonyl](heptyl)amino]ethyl}-1,3-thiazol-2-yl)thio]-2-methylpropionic acid

Participants

Reaction Steps

2-[(4-{2-[[(5-Chloro-1H-indol-2-yl)carbonyl](heptyl)amino]ethyl}-1,3-thiazol-2-yl)thio]-2-methylpropionic acid tert-butyl ester (270 mg) obtained in Example 312-1 was dissolved in formic acid (5 mL), 4N hydrochloric acid/ethyl acetate solution (5 mL) was added, and the mixture was stirred at room temperature for 3 hr. The reaction mixture was concentrated under reduced pressure, and ether was added to the residue to give the title compound (192 mg) as a white solid.

Provenance & Evidence