Trifluoroacetic acid → HCID 178512543, compound

Participants

Reaction Steps

To a solution of tert-butyl N-{[4-({4-[N′,N″-bis(tert-butoxycarbonyl)carbamimidamido]benzoyl}oxy)-2-chlorophenyl]acetyl}-1-trityl-L-histidinate (265 mg) in dichloromethane (2.70 mL) was added trifluoroacetic acid (0.619 mL) under ice-cooling, followed by stirring at room temperature overnight. The reaction mixture was concentrated under reduced pressure and washed with water, and the filtrate was concentrated under reduced pressure. The residue was purified by ODS silica gel column chromatography (0.01 M hydrochloric acid-acetonitrile), and the purified product was dried under reduced pressure to obtain N-({4-[(4-carbamimidamidobenzoyl)oxy]-2-chlorophenyl}acetyl)-L-histidine 2 hydrochloride (54.1 mg).

Provenance & Evidence