Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10323
Title: A comparison of the asymmetric hydrogenation catalyzed by rhodium complexes containing chiral ligands with a binaphthyl unit and those with a 5,5 ',6,6 ',7,7 ',8,8 '-octahydro-binaphthyl unit
Authors: Zhang, FY
Kwok, WH
Chan, ASC
Issue Date: 2001
Publisher: Pergamon Press
Source: Tetrahedron : asymmetry, 2001, v. 12, no. 16, p. 2337-2342 How to cite?
Journal: Tetrahedron : asymmetry 
Abstract: The chiral ligands H-8-BINAPO and H-8 BDPAB were synthesized by reacting chlorodiphenylphosphine with H-8-BINOL and H-8-BINAM, respectively. Applications or these ligands in the Rh-catalyzed enantioselective hydrogenation of a variety or (Z)-acetamido-3-arylacrylic acid methyl esters provided chiral amino acid derivatives with good to excellent enantioselectivities (H-8-BINAPO: up to 840% e.e.: H-8-BDPAB: up to 97.1% e.e.). In the hydrogenation of acetamidoacrylic acid, 99%. e.e. was obtained when a [Rh(H-8-BDPAB)] catalyst was used. The catalytic activities and enantioselectivities of [Rh(H-8 BINAPO)](+) and [Rh(H-8-BDPAB)](+) are substantially better than those obtained with the corresponding rhodium catalysts containing BINAPO (up to 64% e.e.) and BDPAB (up to 92.6% e.e.).
URI: http://hdl.handle.net/10397/10323
ISSN: 0957-4166
EISSN: 1362-511X
DOI: 10.1016/S0957-4166(01)00399-8
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