反应详情

To a solution of methyl (2S,4S)-1-BOC-4-[(4,4-dimethylcyclohexyl)amino]pyrrolidine-2-carboxylate (2.37 g, 6.7 mmol) prepared in Step A of Example A1 in DCM (10 ml) was added TEA (1.36 g, 13.4 mmol), slowly added dropwise methanesulfonylchloride (104 mg, 0.91 mmol) at 0° C., and stirred at rt for 30 min. After the reaction finished, the solvent was concentrated in vacuo, the residue was extracted with water and EtOAc. The organic layer was dried over MgSO4, concentrated in vacuo, and purified by column chromatography (eluent: EtOAc/Hex ═1/1) to give the title compound (2.08 g, 72%).

1. concentrationthe solvent was concentrated in vacuo
2. extractionthe residue was extracted with water and EtOAc
3. dry with materialThe organic layer was dried over MgSO4
4. concentrationconcentrated in vacuo
5. custompurified by column chromatography (eluent: EtOAc/Hex ═1/1)