Asymmetric catalysis

C - Chemistry – Metallurgy – 07 – C

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260/478, 260/488

C07C 69/00 (2006.01) C07C 67/303 (2006.01)

Patent

CA 1086771

Abstract of the Disclosure Catalytic asymmetric hydrogenation of the Z geometric isomer of a compound of the formulae Image and Image wherein R, R1 and R2 each independently represent hydrogen, substituted or unsubstituted alkyl having from 1 to 5 carbon atoms or substituted or unsubstituted aryl, and R3 represents substituted or unsubstituted alkyl having from 1 to 5 carbon atoms or substituted or unsubstituted aryl, in the presence of a homogeneous, coordination complex catalyst comprising rhodium, iridium or ruthenium in combination with an optically active bis phosphine ligand provides an outstanding level of optical purity.

259754

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