Substituted ferrocenyldiphosphines as ligands for...

Details Substituted ferrocenyldiphosphines as ligands for... Substituted ferrocenyldiphosphines as ligands for...

2007-07-17

2007-07-17

Page, Thurman (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C556S144000, C564S415000, C564S422000, C554S143000, C554S145000

Reexamination Certificate

active

10556085

ABSTRACT:
Compounds of the formula (I), in which R1is C1-C4alkyl, C6-C10aryi or C7-C11, aralkyl, R2is an open-chain or cyclic secondary amino group, and R is a radical of the formula in whichR3is C1-C4alkyl or C1-C4alkoxy, and R4is H, C1-C4alkyl or C1-C4alkoxy, are ligands for metal complexes as homogeneous hydrogenation catalysts for prochiral organic compounds containing double bonds, by means of which a very high activity and productivity and also enantioselectivity can be achieved

REFERENCES:
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Hasashi et al., Asymmetric synthesis catalyzed by chiral ferrocenylphosphine-transition metal complexes: VII. New chiral ferrocenylphosphines with C2 symmetry, Journal of Organometallic Chemistry, 1989, 370, pp. 129-139.
Schwink et al., Enantioselective Preparation of C2 Symmetrical Ferrocenyl Ligands for Asymmetric Catalysis, Chemistry A European Journal, 1998, 4 (5), 950-968.
Schwink et al., {New C2-symmetrical ferrocenyl diamines as ligands for ruthenium catalyzed transfer hydrogenation, Tetrahedron: Asymmetry, 9, 1998, pp. 1143-1163.
Christian Markert et al., “Screening of Chiral Catalysts and Catalyst Mixtures by Mass Spectrometric Monitoring of Catalytic Intermediates”, Angewandte Chemie, International Edition, 43 (19), pp. 2498-2500, Coden: ACIEF5, ISSN: 1433-7851, XP002293446, 2004.

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