Lithium Hydroxide → HCID 69583707, compound

Participants

Reaction Steps

To a stirred solution of (R)-1-[4-(4-chloro-benzenesulfonyl)-4-(2,5-difluoro-phenyl)-cyclohexylmethanesulfonyl]-pyrrolidine-2-carboxylic acid methyl ester (Example 18) (108 mg, 0.19 mmol.) in tetrahydrofuran (10 mL) was added lithium hydroxide (18 mg) in water (4 mL) and the mixture vigorously stirred for 1.5 hours. After removal of the solvent in vacuo, the aqueous residue was acidified to pH 1 with 2N aqueous hydrochloric acid and extracted with ethyl acetate (2×10 mL). The combined organic layers were washed with brine (10 mL), dried (MgSO4) and evaporated to leave a residue which was purified by column chromatography on silica, eluting with ethyl acetate:dichloromethane:acetic acid (30:60:1), to afford the desired MS (ES+) 562 ([MH]+).

Provenance & Evidence