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Journals and Conferences
Catalyzed by a rhodium complex of P-stereogenic diphosphine trichickenfootphos, five-membered cyclic α-dehydroamino ketones bearing endocyclic acyl and endocyclic vinyl groups were hydrogenated to give chiral α-amino ketones with quantitative conversions and excellent enantioselectivities.
A new catalytic system has been developed for the asymmetric hydrogenation of β-secondary-amino ketones using a highly efficient P-chiral bisphosphine-rhodium complex in combination with ZnCl2 as the activator of the catalyst. The chiral γ-secondary-amino alcohols were obtained in 90-94 % yields, 90-99 % enantioselectivities, and with high turnover numbers… (More)
A highly efficient P-stereogenic diphosphine-rhodium complex was applied to the chemo- and enantioselective hydrogenation of allylic hydrazones for the synthesis of chiral allylic hydrazines in 89-96 % yields and with 82-99 % ee values. This methodology was successfully applied to the preparation of versatile chiral allylic amine derivatives.
Catalyzed by a rhodium complex of P-stereogenic diphosphine ligand (R)-2-tert-butylmethylphosphino-3-(di-tert-butylphosphino)quinoxaline ((R)-3H-QuinoxP*), five-membered cyclic α-dehydroamino ketones bearing endocyclic vinyl and endocyclic keto-carbonyl groups were sequentially hydrogenated to give chiral cyclic trans-β-amino alcohols with two contiguous… (More)