反应详情

1,1-Dimethylethyl (2S)-4-[(4-cyano-2-methylphenyl)sulfonyl]-2-methyl-1-piperazinecarboxylate (may be prepared as described in Intermediate 12; 5.52 g, 14.54 mmol) was dissolved in DCM (80 ml) and then 4M hydrochloric acid in dioxane (36.3 mL, 145 mmol) was added at room temperature and the reaction mixture was stirred for two hours. The solvent was removed under vacuum to give the title compound (4.0 g) as a white solid.

1. customThe solvent was removed under vacuum