Sodium Hydroxide → 3-(4-{[(4-Chloro-benzenesulfonyl)-((R)-5,5-dimethyl-2-oxo-azepan-3-yl)-amino]-methyl}-phenyl)-propionic acid

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Reaction Steps

3-(4-{[(4-Chloro-benzenesulfonyl)-((R)-5,5-dimethyl-2-oxo-azepan-3-yl)-amino]-methyl}-phenyl)-propionic acid methyl ester (0.06 g, 0.11 mmol) was dissolved in methanol (4 ml) and treated with 1 N NaOH (0.2 ml) overnight. The mixture was diluted with water and the methanol removed under reduced pressure. The residue was acidified (KHSO4/K2SO4) and extracted with ethyl acetate (3×). The combined extracts were concentrated and the crude residue was purified using preparative RP(C18) chromatography: lyophilisate 15 mg; MS: m/e=491.1 (MH+).

Provenance & Evidence