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0 °C

Aqueous 6 M NaOH solution (100 ml) was added to a solution of methyl 3-(1-(4-chloro-2,5-dimethylphenylsulfonyl)piperidin-2-yl)propionate (12.82 g, 34.3 mmol) in THF (100 ml). After a reaction time of 1 h, the solvent was removed in a rotary evaporator and the residue was cooled to 0° C. 6 M HCl (100 ml) was added and extraction with ethyl acetate was carried out. The organic phase was dried over Na2SO4 and concentrated. Yield: 12.36 g, 100%

1. customAfter a reaction time of 1 h, the solvent was removed in a rotary evaporator
2. addition6 M HCl (100 ml) was added
3. extractionextraction with ethyl acetate
4. dry with materialThe organic phase was dried over Na2SO4
5. concentrationconcentrated