Sodium Hydroxide → 4'-[[2-[[(2R)-2-(3-chlorophenyl)-2-hydroxyethyl]amino]ethyl]-amino]-N-[(3-hydroxypropyl)sulfonyl]-3-isobutoxy-4-biphenylcarboxamide dihydrochloride

Participants

Reaction Steps

To a solution of 3-[[[[4′-[[2-[(tert-butoxycarbonyl)-[(2R)-2-(3-chlorophenyl)-2-hydroxyethyl]amino]ethyl]amino]-3-isobutoxy-4-biphenylyl]carbonyl]amino]sulfonyl]propyl acetate (34.0 mg) in methanol (0.340 ml) and tetrahydrofuran (0.170 ml) was added 1N aqueous sodium hydroxide solution (0.228 ml) and the mixture was stirred at room temperature for 1 hour. The reaction mixture was extracted with ethyl acetate, washed with water and brine and dried over magnesium sulfate. The solvent was concentrated under reduced pressure. To a solution of the resulting residue in 1,4-dioxane (0.340 ml) was added 4N hydrogen chloride in 1,4-dioxane (0.340 ml) and the mixture was stirred at room temperature overnight. The solvent was concentrated under reduced pressure and to the residue was added ethyl acetate. The precipitate was collected by filtration and dried in vacuo to give 4′-[[2-[[(2R)-2-(3-chlorophenyl)-2-hydroxyethyl]amino]ethyl]amino]-N-[(3-hydroxypropyl)sulfonyl]-3-isobutoxy-4-biphenylcarboxamide dihydrochloride (24.8 mg) as a yellow powder.

Provenance & Evidence