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Lanthanide alkoxide catalysts chiral

Shibasaki has developed a family of heterobimetallic complexes 274 to 279 derived from the alkali metal diaryloxy salt of chiral binaphthols and lanthanide alkoxides these complexes function as catalysts in a variety of useful enantiose-lective addition reactions [127,128,13j]. [Pg.999]

The use of lanthanide complexes in asymmetric catalysis was pioneered by Danishefsky s group with the hetero-Diels-Alder reaction,and their utility as chiral Lewis acid catalysts was shown by Kobayashi. The Brpnsted base character of lanthanide-alkoxides has been used by Shibasaki for aldol reactions, cyanosilylation of aldehydes and nitroaldol reactions.The combination of Lewis acid and Brpnsted base properties of lanthanide complexes has been exploited in particular by Shibasaki for bifunctional asymmetric catalysis. These bimetallic lanthanide-main-group BINOL complexes are synthesized according to the following routes ... [Pg.528]

The same group extended this work to a cyclic imine (Scheme 5-47) better results were obtained with heterobimetallic lanthanide catalysts than with chiral titanium alkoxides. [Pg.166]

See other pages where Lanthanide alkoxide catalysts chiral is mentioned: [Pg.177]    [Pg.996]    [Pg.456]    [Pg.196]    [Pg.134]    [Pg.128]    [Pg.37]    [Pg.1078]    [Pg.143]   
See also in sourсe #XX -- [ Pg.176 ]



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Lanthanide alkoxides

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