HCID 20183020, compound → HCID 178445974, compound

Participants

Reaction Steps

66 mg (0.1 mmole) of 4(S)-[N-benzyloxycarbonyl-3-(1-naphthyl)-L-alanyl-L-histidyl]amino-3(S)-hydroxy-6-methylheptanoic acid hydrazide (prepared as described in Example 5) were dissolved in 3 ml of dimethylformamide, and then 31 mg (0.1 mmole) of N-hydroxysuccinimide 4-benzoylbutyrate were added and the mixture was stirred for 2 days at room temperature. The resulting reaction mixture was concentrated by evaporation under reduced pressure, and water was added to the resulting residue. After the water had been added to the residue, the precipitate was separated by filtration. It was washed with water, and the powder obtained after drying was washed with ethyl acetate, to give 63 mg of the title compound as a white powdery solid melting at 158°-160°, [α]27 -44.4° (C=0.5, methanol).

Provenance & Evidence