Abstract
Hydrogenation of α-acetamidocinnamic and itaconic acids and their esters was carried out in the presence of the cationic RhI triflate complex with (+)-4S,5S-N 4,N 4,N 5,N 5,2,2-hexamethyl-1,3-dioxolane-4,5-dimethaneamine (DIODMA). The optical yields depended on the nature of the solvent and the hydrogen pressure and reached 30%. The catalytically active forms of the complexes and their transformations in the presence of phosphines, molecular hydrogen, and the substrate were studied by 1H and 31P NMR spectroscopy.
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Nindakova, L.O., Shainyan, B.A. & Albanov, A.I. Enantioselective hydrogenation in the presence of the rhodium(i) complex with (+)-4S,5S-N4,N4,N5,N5,2,2-hexamethyl-1,3-dioxolane-4,5-dimethaneamine. Russian Chemical Bulletin 50, 1860–1866 (2001). https://doi.org/10.1023/A:1014390314872
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DOI: https://doi.org/10.1023/A:1014390314872