1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 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

Participants

Reaction Steps

2-({4-[2-(Heptylamino)ethyl]-1,3-thiazol-2-yl}thio)-2-methylpropionic acid tert-butyl ester (400 mg) obtained in Example 303-2 and 5-chloro-1H-indole-2-carboxylic acid (196 mg) were dissolved in N,N-dimethylformamide (5 mL), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide (EDC) hydrochloride (211 mg) and hydroxybenzotriazole (HOBT) (168 mg) were successively added thereto, and the mixture was stirred at room temperature for 14 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and ether was added to the residue to give the title compound as a white powder.

Provenance & Evidence