2-cyclohexylsulfonyl-2-methylpropanoic acid

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3.47 g (13.2 mmol) of 2-cyclohexanesulfonyl-2-methyl-propionic acid ethyl ester in THF/water (4/1, 50 mL) were added 1.11 g (26.4 mmol) of lithium hydroxide monohydrate. The reaction was stirred at room temperature for 18 h. The reaction was further diluted with water (20 mL) and then washed with DCM (2×15 mL). The basic aqueous layer was cooled in an ice bath and then acidified with 1M aqueous HCl solution to pH 2. The acidic aqueous layer was extracted with DCM (3×20 mL). The combined organic extracts were washed with brine, dried over Na2SO4 and filtered. Concentration of the filtrate under reduced pressure afforded 2.96 g of 2-cyclohexanesulfonyl-2-methyl-propionic acid. washed with DCM (2×15 mL) The basic aqueous layer was cooled in an ice bath The acidic aqueous layer was extracted with DCM (3×20 mL) The combined organic extracts were washed with brine dried over Na2SO4 filtered

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3.47 g (13.2 mmol) of 2-cyclohexanesulfonyl-2-methyl-propionic acid ethyl ester in THF/water (4/1, 50 mL) were added 1.11 g (26.4 mmol) of lithium hydroxide monohydrate. The reaction was stirred at room temperature for 18 h. The reaction was further diluted with water (20 mL) and then washed with DCM (2×15 mL). The basic aqueous layer was cooled in an ice bath and then acidified with 1M aqueous HCl solution to pH 2. The acidic aqueous layer was extracted with DCM (3×20 mL). The combined organic extracts were washed with brine, dried over Na2SO4 and filtered. Concentration of the filtrate under reduced pressure afforded 2.96 g of 2-cyclohexanesulfonyl-2-methyl-propionic acid. washed with DCM (2×15 mL) The basic aqueous layer was cooled in an ice bath The acidic aqueous layer was extracted with DCM (3×20 mL) The combined organic extracts were washed with brine dried over Na2SO4 filtered