2-[(R)-3-(4-isopropyl-benzylcarbamoyl)-4-(4-trifluoromethyl-benzenesulfonyl)-piperazin-1-yl]-4-methyl-thiazole-5-carboxylic acid tert-butyl ester → 2-[(R)-3-(4-isopropyl-benzylcarbamoyl)-4-(4-trifluoromethyl-benzenesulfonyl)-piperazin-1-yl]-4-methyl-thiazole-5-carboxylic acid

Participants

Reaction Steps

A solution of the compound (224 mg) obtained in Example 5 in trifluoroacetic acid (1.1 ml) was stirred at room temperature for 1 hr. The reaction mixture was concentrated under reduced pressure, toluene was added to the residue, and the mixture was concentrated again under reduced pressure. Diisopropyl ether was 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 (97 mg).

Provenance & Evidence