Methanol → 4-(4-{3-[2-(3-Trifluoromethyl-benzoylamino)-acetylamino]-azetidin-1-yl}-cyclohexyl)-benzoic acid

Participants

Reaction Conditions

Reaction Steps

A solution of 4-(4-{3-[2-(3-trifluoromethyl-benzoylamino)-acetylamino]-azetidin-1-yl}-cyclohexyl)-benzoic acid methyl ester (less polar fraction from Example 9, 250 mg, 0.48 mmol) in THF (1 mL), MeOH (1 mL) and H2O (1 mL) was treated with LiOH.H2O (50 mg, 1.2 mmol) at room temperature. The reaction was then heated to 50° C. for 2 hours. The reaction was allowed to cool and solvent was removed in vacuo. 1 N HCl solution was added to adjust the solution to pH=6˜7. The white precipitate was collected by filtration and washed with water. The solid was dried in vacuo, re-dissolved in ethyl acetate and re-crystallization to afford the title compound.

Provenance & Evidence