Hydrochloric Acid → 3-(Isopropyl-{3-methyl-5-[2-(pyridin-4-ylamino)-ethoxy]-benzoyl}-amino)-propionic acid trifluoroacetate

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Reaction Steps

To a solution of 3-(isopropyl-{3-methyl-5-[2-(pyridin-4-ylamino)-ethoxy]-benzoyl}-amino)-propionic acid methyl ester trifluoroacetate (0.031 g) in dioxan (1 ml) was added 2M aqueous sodium hydroxide (0.078 ml), and the resultant solution was stirred at room temperature for 3 h. 1M Aqueous hydrochloric acid (ca 0.5 ml) was added and the resultant solution was concentrated under reduced pressure. Th residue was subjected to preparative hplc and the title compound (0.027 g) was obtained as a colourless oil by concentration of the required fraction under reduced pressure and drying by repetitive addition of acetonitrile and concentration under reduced pressure.

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