Methanol → 4-(4-((R)-(4'-chlorobiphenyl-2-yl)((S)-1,1-dimethylethylsulfinamido)methyl)piperidin-1-yl)benzoic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl 4-(4-((R)-(4′-chlorobiphenyl-2-yl)((S)-1,1-dimethylethylsulfinamido)methyl)piperidin-1-yl)benzoate (INTERMEDIATE 128, 0.40 g, 0.62 mmol) in THF (4.3 ml) was added MeOH (1.4 ml) and a solution of LiOH (0.09 g, 4.44 mmol) in water (1.4 ml). The reaction mixture was stirred at 40° C. overnight. The reaction mixture was cooled to rt, concentrated under reduced pressure, and the residue suspended in water. The suspension was cooled to 0° C., acidified to pH ˜2 using 1N HCl aq., filtered, and the filtercake dried in a vacuum oven to provide the title compound (0.38 g, yield: almost quantitative).

Provenance & Evidence