Acetic Acid → 3-{3-[(7-{[(2R)-2-Hydroxy-2-(8-hydroxy-2-oxo-1,2-dihydroquinolin-5-yl)ethyl]amino}heptyl)oxy]propyl}benzenesulfonamide acetate

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A solution of 3-(3-{[7-(benzyl{(2R)-2-[8-(benzyloxy)-2-oxo-1,2-dihydroquinolin-5-yl]-2-hydroxyethyl}amino)heptyl]oxy}propyl)benzenesulfonamide (36 mg) in ethanol (10 ml) with ethyl acetate (2 ml) and glacial acetic acid (1 ml) was hydrogenated using 10% palladium on carbon (50% water by weight, 10 mg) and 20% palladium hydroxide on carbon (10 mg) for 19 h. The catalyst was removed by filtration and the filtrate was evaporated in vacuo. The residue was purified on an aminopropyl SPE cartridge (2 g), eluting with methanol-dichloromethane mixtures. Evaporation of the appropriate fractions with glacial acetic acid gave the title compound (15 mg). LCMS RT=2.26 min ES+ve m/z 532 (MH)+

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