Enantioselective hydrogenation of α-ketoamides over Pt/Al2O3 modified by cinchona alkaloids
摘要:
Pyruvamide and its N-alkylated derivatives have been synthesised and hydrogenated enantioselectively to the corresponding alcohols over an alumina-supported Pt catalyst chirally modified by adsorbed cinchonidine. Depending on the substrate structure and reaction conditions, this catalyst system afforded ees up to 60%. This is the highest ee achieved hitherto with a solid catalyst in alpha-ketoamide hydrogenation. (C) 1997 Elsevier Science Ltd.
Enantioselective hydrogenation of α-ketoamides over Pt/Al2O3 modified by cinchona alkaloids
摘要:
Pyruvamide and its N-alkylated derivatives have been synthesised and hydrogenated enantioselectively to the corresponding alcohols over an alumina-supported Pt catalyst chirally modified by adsorbed cinchonidine. Depending on the substrate structure and reaction conditions, this catalyst system afforded ees up to 60%. This is the highest ee achieved hitherto with a solid catalyst in alpha-ketoamide hydrogenation. (C) 1997 Elsevier Science Ltd.