HCID 57162144, compound → HCID 57241958, compound

Participants

Reaction Steps

0.77 g of (3S,5S)-5-[(7-amidino-9-keto-2-fluorenyl)oxymethyl]-3-carboxymethyl-1-(3-phenylpropyl)-2-pyrrolidinone are dissolved in 15 ml of glacial acetic acid, 0.4 g of 10% palladium/charcoal are added and the mixture is hydrogenated for 24 hours at ambient temperature under 3 bars of hydrogen pressure. The catalyst is filtered off, the filtrate is evaporated down and purified by chromatography over silica gel (eluant: methylene chloride/methanol/glacial acetic acid =3:1:0.1). The crude product obtained is triturated with ether, filtered off and taken up in 50 ml of a mixture of glacial acetic acid and water (1:2). This solution is concentrated until crystallisation begins (about 5 ml). The crystals precipitated are washed with water, acetone and ether.

Provenance & Evidence