Chiral diphosphorus compounds and their transition metal...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C549S216000, C549S214000, C549S206000

Reexamination Certificate

active

10643552

ABSTRACT:
The present invention relates to chiral diphosphorus compounds and their transition metal complexes, to a process for preparing chiral diphosphorus compounds and their transition metal complexes and also to their use in asymmetric syntheses.

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A. Terfort Synthesis, Oct. 1992, 10, pp. 951-953; Synthesis and Application of (3R,4R)-3,4-Bis(diphenylphosphino)tetrahydrofuran as Ligand for Asymmetric Hydrogentation of Acrylic Acids.
W.R. Jackson and C. G. Lovel; Aust. J. Chem., (month unavailable) 1982, 35, pp. 2069-2075; “The Stereochemistry of Organometallic Compounds, XXIII* Synthesis of a Chiral Diphosphinite (diphin) and Evaluation of its Use as a Ligand for Asymmetric Catalysts”.
A. Kless et al; Tetrahedron: Asymmetry, vol. 7, No. 1, pp. 33-36; (month unavailable) 1996 “Chiral Phosphinephosphites Having Axial and Central Chirality in Asymmetric Hydroformylations”.
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