Homogeneous and heterogeneous asymmetric reactions. Part 13. Clay-supported noble metal catalysts in enantioselective hydrogenations
作者： Béla Török , Katalin Balázsik , Istvá Kun , György Szöllösi , Gerda Szakonyi
DOI: 10.1016/S0167-2991(99)80254-7
关键词: Transition metal 、 Organic chemistry 、 Enantioselective synthesis 、 Noble metal 、 Cinchonidine 、 Palladium 、 Chemistry 、 Heterogeneous catalysis 、 Ethyl lactate 、 Catalysis
摘要: Abstract The preparation, characterization and application of new clay-supported Pt Pd catalysts containing cinchonidine as chiral modifier are described. preparation was carried out by deposition the metal impregnation followed immobilization modifier. were characterized X-ray diffraction (XRD) transmission electron microscopy (TEM). samples tested in enantioselective hydrogenation ethyl pyruvate 2-methyl-2-pentenoic acid. found to be active hydrogenations producing moderate good enantioselectivities (up 56% ee for ( R )- lactate). Moreover, recyclable. on led us draw important conclusions concerning existing mechanistic explanations.
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