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Asymmetric catalytic hydrosilylation of ketones preparation of chiral ferrocenylphosphines as chiral ligands

✍ Scribed by Tamio Hayashi; Keiji Yamamoto; Makoto Kumada

Publisher
Elsevier Science
Year
1974
Tongue
French
Weight
195 KB
Volume
15
Category
Article
ISSN
0040-4039

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✦ Synopsis

Asymmetric syntheses, especially hydrogenation, catalyzed by transition metal complexes with chiral ligands have recently attracted much interest. In most cases, phosphines having an asymmetric center at the phosphorus atom1 or those derived from L-threito12 or I-menthol3 have

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New chiral ferrocenylphosphines containing an imino group on the side chain, (S)-N-alkylidene-l-[(R)-2-diphenylphosphinoferrocenyl]ethylamines, were prepared by condensation of (S)-l-[(R)-2-diphenylphosphinoferrocenyl]ethylamine with aromatic aldehydes. The imino-phosphine ligands were found to be v

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New chiral ligands 3 and 5 have been synthesized. Their Ru(II) complexes are effective catalysts for transfer hydrogenation of both aryl alkyl and dialkyl ketones (with ee's up to 79.5%).