Lithium Hydroxide → (2S,4R)-1-(2-Isopropyl-5-methyl-2H-pyrazol-3-yl)-4-[4-(2,2,2-trifluoro-ethoxy)-2-trifluoromethyl-benzenesulfonyl]-pyrrolidine-2-carboxylic Acid

Participants

Reaction Steps

In analogy to the procedure described in example 253e, a mixture of (2S,4R)-1-(2-isopropyl-5-methyl-2H-pyrazol-3-yl)-4-[4-(2,2,2-trifluoro-ethoxy)-2-trifluoromethyl-benzenesulfonyl]-pyrrolidine-2-carboxylic acid methyl ester and (2R,4R)-1-(2-isopropyl-5-methyl-2H-pyrazol-3-yl)-4-[4-(2,2,2-trifluoro-ethoxy)-2-trifluoromethyl-benzenesulfonyl]-pyrrolidine-2-carboxylic acid methyl ester was saponified in the presence of lithium hydroxide to give the title compound as colorless solid. MS (ESI): m/z=544.2 [M+H]+.

Provenance & Evidence