Water → HCID 86598318, compound

Participants

Reaction Steps

A solution of benzoyl chloride (94 mg, 0.669 mmol) in ethyl acetate (2 ml) was added dropwise to a two-layer solution of O-(3-aminopropyl)-3,5-dichloro-N-trifluoroacetyl-L-tyrosine methyl ester hydrochloride (209 mg, 0.461 mmol) and sodium bicarbonate (150 mg, 1.79 mmol) in ethyl acetate (3 ml)-water (2 ml) with stirring under ice cooling and the mixture was stirred at the same temperature for 1 hr. The reaction mixture was diluted with ethyl acetate (20 ml) and the organic layer was separated, washed with brine and dried. The solvent was distilled off under reduced pressure. The residue was purified by flash column chromatography on silica gel (n-hexane/ethyl acetate=2−1) to give O-(3-benzoylaminopropyl)-3,5-dichloro-N-trifluoroacetyl-L-tyrosine methyl ester (253 mg, 100%) as a colorless oil.

Provenance & Evidence