Bisphosphine ligand

Details Bisphosphine ligand Bisphosphine ligand

2008-03-25

2009-08-04

Parsa, Jafar (Department: 1621)

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

Organic compounds

Phosphorus containing

C502S326000

Reexamination Certificate

active

07569730

ABSTRACT:
A compound represented by the following general formula (I):[wherein R1represents hydrogen atom, or an alkyl group, R2represents a hydroxyalkyl group, or a triarylmethyloxyalkyl group, or R1and R2combine together to represent —C(R3)(R4)— (R3and R4represent hydrogen atom, an alkyl group, or hydroxyl group, or R3and R4may combine together to represent oxo group), or —C(R5)(R6)—O—C(R7)(R8)— (R5to R8represent hydrogen atom, an alkyl group, or hydroxyl group, or R5and R6may combine together to represent oxo group, and R7and R8may combine together to represent oxo group); Ar1to Ar4independently represent an aryl group (the aryl group may have 1 to 5 of the same or different substituents), *1 to *4 indicate asymmetric carbons, and configurations are cis between *1 and *2, cis between *3 and *4, and trans between *2 and *3]. An optically active phosphine ligand which can be easily synthesized and gives a transition metal complex showing superior asymmetric catalyst activity is provided.

REFERENCES:
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