反应详情

can be prepared from (E)-(3R,5S)-7-[3-(4-Fluoro-phenyl)-1-isopropyl-1H-indol-2-yl]-3,5-dihydroxy-hept-6-enoic acid ((S)-1-phenyl-ethyl)-amide by hydrolysis with sodium hydroxide according to the procedure described above for the preparation of (E)-(3R,5S)-7-[2-Cyclopropyl-4-(4-fluoro-phenyl)-quinolin-3-yl]-3,5-dihydroxy-hept-6-enoic acid. After completion of the hydrolysis, excess sodium hydroxide is neutralised by addition of hydrochloric acid and the solvent is evaporated under reduced pressure. As a work-up variant, the residue is dissolved in water at 60-70° C. and the solution is allowed to cool down to room temperature. Crystallisation occurs. The formed suspension is cooled down to 5° C., stirred for several hours at this temperature to complete the crystallisation and the product is isolated by filtration. (E)-(3R,5S)-7-[3-(4-Fluoro-phenyl)-1-isopropyl-1H-indol-2-yl]-3,5-dihydroxy-hept-6-enoic acid sodium salt is obtained as beige to yellow crystalline product.

1. customthe solvent is evaporated under reduced pressure
2. dissolutionAs a work-up variant, the residue is dissolved in water at 60-70° C.
3. customCrystallisation
4. temperatureThe formed suspension is cooled down to 5° C.
5. customthe crystallisation
6. customthe product is isolated by filtration