Chiral inducers with (1R,2R)-1,2-diaminocyclohexane core for organo- and metallocatalysisстатья
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Дата последнего поиска статьи во внешних источниках: 29 июля 2020 г.
Аннотация:A P*-chiral diamidophosphite ligand of the 1,3,2-diazaphospholidine series was obtained by direct phosphorylation of N-((1R,2R)-2-((tert-butoxycarbonyl)amino)cyclohexyl)-N'-((1R)-1-(hydroxymethyl)propyl)ethanediamide. The use of this ligand allowed reaching 98% ee in the Pd-catalyzed allylation involving (E)-1,3-diphenylallyl acetate, 81% ee in the allylation of ethyl 2-oxocyclohexane-1-carboxylate with cinnamyl acetate, 78% ee in the Rh-catalyzed hydrogenation of methyl (Z)-2-acetamido-3-phenylacrylate, and 32% ee in the Rh- and Ir-catalyzed hydrosilylation of (E)-N-(4-methoxyphenyl)-1-phenylethane-1-imine with diphenylsilane. The starting ethanediamide provides up to 50% ee in the organocatalytic reduction of the same imine.