1. Asymmetric hydrogenation of methyl pyruvate using a platinum-carbon catalyst modified with cinchonidine;Orito;J Chem Soc Jpn,1979
2. Asymmetric hydrogenation of methyl benzoylformate using platinum-carbon catalysts modified with cinchonidine;Orito;J Synth Org Chem Jpn,1979
3. Asymmetric hydrogenation of α-keto esters using a platinum-alumina catalyst modified with cinchona alkaloid;Orito;J Chem Soc Jpn,1980
4. Orito Y,Imai S,Niwa S. Asymmetric reduction of α-keto acid esters. Jpn Kokai Tokkyo Koho 8,035,060 (Cl.C07C67/31), 1980.
5. Asymmetric hydrogenation of ethyl benzoylformate using a platinum-carbon catalyst modified with cinchonidine. Effect of the preparation of the catalyst on asymmetric selectivity;Orito;J Chem Soc Jpn,1982