METHOD OF PREPARING MODIFIED PLATINUM CATALYST FOR ENANTIOSELECTIVE HYDRATION OF ESTERS OF ALFA-KETOCARBOXYLIC ACIDS Russian patent published in 2009 - IPC B01J37/02 B01J23/42 B01J37/16 C07B35/02 

FIELD: chemistry.

SUBSTANCE: invention relates to production of catalysts and can be used in chemical industry and in production of medications. Described is method of preparing modified platinum catalyst for enantioselective hydration of esters of alfa-ketacarboxylic acids which includes impregnation of hexachloroplatinic acid from solution into pores of prepared carrier, as such supersewn polystyrene is used, by water-absorbing capacity from solution tetrahydrofurane : methanol : water with ratio 4:1:1, mixture of hexachlorplatinic acid and carrier is kept during 10-15 minutes mixed, after which it is dried at 70-75°C, washed with Na₂CO₃ solution with further reduction of hexachlorplatinic acid, filtering, washing and drying of catalyst and modification with cinchonidine solution.

EFFECT: reduction of time of catalyst preparation, increase of catalyst activity, enentioselectivity and stability.

4 cl, 1 tbl, 3 ex