Hydrochloric Acid → (R)-3-(4-isopropyl-benzylcarbamoyl)-4-(4-trifluoromethyl-benzenesulfonyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-carboxylic acid

Participants

Reaction Steps

To a mixed solution of the compound (75 mg) obtained in Example 8 in tetrahydrofuran (400 μl) and methanol (400 μl) was added, with stirring at room temperature, 2N aqueous sodium hydroxide solution (186 μl). After stirring at room temperature for 30 min, 2N aqueous hydrochloric acid solution (186 μl) was added, and the mixture was concentrated under reduced pressure. Methanol and water were added to the residue, and the mixture was stirred at room temperature. The precipitated crystals were collected by filtration, and dried to give the title compound (61 mg).

Provenance & Evidence