ABSTRACT
Ru/L and Ru/ZSM-5 zeolites were prepared and investigated in the enantioselective hydrogenation of (6: 7, 8: 9)-dibenzobicyclo[3, 2, 2)nona-6, 8dien-2-one (1). The reaction was carried out in the presence of tartaric acid or cinchona. as modifiers. The results show that no stereospecific interaction was occurring in the hydrogenation of (I) to (6: 7,8: 9)-dibenzobicyclo(3, 2, 2]nona6, 8-dien-2-ol. But further hydrogenation of (I) to 8:9-benzo-6, 7cyclohexanbicyclo(3, 2, 2)non-8-en-2-one results in an enatioselective hydrogenation of this to (2S) 8:9-benzo-6, 7-cyclohexanbicyclo(3, 2, 2]non-8en-2-ol. Tartaric acid was proved to be an effective modifier.
