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Gy?rgy Sz?llsi Beáta Hermán Ferenc Fül?p and Mihály Bartók 《Reaction Kinetics and Catalysis Letters》2006,88(2):391-398
Summary The Pt-alumina-CD catalyzed enantioselective hydrogenations of ethylpyruvate (EP), ketopantolactone (KPL) and methyl benzoylformate
(MBF) have been studied at first in an H-Cube flow hydrogenator in toluene and toluene + acetic acid. Based on the experience
of previous studies carried out in batch-reactor and continuous flow systems, some parameters were kept constant (amount of
catalyst, 380 mg; substrate concentration, 0.18 mol/L; temperature, 283 K), whereas others, namely chiral modifier (CD) concentration,
hydrogen pressure and total liquid flow (TLF: substrate + modifier + solvent) were varied. In the course of enantioselective
hydrogenation (R)-products were formed in excess: in the case of EP, KPL, MBF: 90, 60, 80 % enantioselectivities were obtained. 相似文献
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