Hydrochloric Acid → HCID 11384784, compound

Participants

Reaction Steps

To a solution ethyl 3-[N-[4-(2,4-dioxothiazolidin-5-yl)benzyl]-N-pentanoylamino]benzoate (0.73 g) obtained in Example 21f in ethanol (10 ml) was added 1N NaOH aqueous solution (3.5 ml), and the mixture was stirred at room temperature for 3 hrs. Then 1N NaOH aqueous solution (1.0 ml) was added, and the mixture was further stirred at room temperature for 3 hrs. To the reaction mixture was added 1N hydrochloric acid (4.5 ml), and the resultant product was extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was subjected to ODS column chromatography [water containing 1% acetic acid and acetonitrile (1:1)] to give the title compound (0.51 g) as a powder.

Provenance & Evidence