The invention concerns novel diphosphines of formula (I) useful in particular, in their optically active form, as ligands in metal complexes. The invention also concerns their uses an intermediates in the preparation of polymeric insoluble ligands. The invention further concerns the use of said insoluble ligands in the preparation of metal complexes for asymmetric. catalysis.
New 5,5′-disubstituted BINAP derivatives: Syntheses and pressure and electronic effects in Rh asymmetric hydrogenation
作者:M. Alame、M. Jahjah、M. Berthod、M. Lemaire、V. Meille、C. de Bellefon
DOI:10.1016/j.molcata.2006.12.019
日期:2007.5
A library of 5,5′-disubstituted BINAP derivatives were synthesized in good yield from optically pure BINAP and evaluated for the Rh-catalyzed homogeneous asymmetric hydrogenation of (α)-acylaminoacrylate ester, with ee of up to 77% being obtained with the phenyl derivative. The enantiomeric excess variation was followed according to the groups introduced in the 5,5′-position of BINAP and for a range