To a solution of 0.15 g (0.32 mmol) N-[6-chloro-4-(2-chloro-phenyl)-pyridin-3-yl]-2-(3,5-dichloro-phenyl)-N-methyl-isobutyramide and 0.25 g (2.47 mmol) L-prolinol in 2 ml dimethyl sulfoxide 0.2 g (1.55 mmol) Na2CO3 was added and the solution was stirred at 13° C. for 22 h. After cooling to ambient temperature, the solution was poured into 20 ml 0.5 N NaHCO3-solution and extracted three times with 30 ml CH2Cl2. The combined organic layers were dried (Na2SO4), filtered and evaporated. The residue was purified by flash-chromatography (SiO2, CH2Cl2/ethyl acetate 1:2) to give 0.15 g (87%) of the title compound as a white foam.
