Triethylamine → benzyl (2S)-1-{(2S)-2-[(1S)-1-(ethoxycarbonyl)butylamino]propionyl}-2,3,4,5,6,7-hexahydro-1H-indole-2-carboxylate

Participants

Reaction Steps

Introduce 123 g of ethyl (2S)-2-aminopentanoate, 160 ml of triethylamine and 160 ml of acetonitrile into a reactor, and then bring the mixture to 60° C., slowly add the solution obtained in Step A and reflux for 4 hours. After returning to ambient temperature, wash the mixture with water and with a dilute acetic acid solution, and then evaporate off the solvents to yield benzyl (2S)-1-{(2S)-2-[(1S)-1-(ethoxycarbonyl)butylamino]propionyl}-2,3,4,5,6,7-hexahydro-1H-indole-2-carboxylate.

Provenance & Evidence