Bisphosphanes

Chiral Bisphosphane Ligands through Modifications of DuPhos and BPE... 

Figure 5 Chiral bisphosphane ligands on the modification of DIOP.

Figure 6 Chiral ferrocene-based bisphosphane ligands.

A C2-symmetric bisphosphane FerroPhos has been developed by Kang and is found to be efficient for the Rh-catalyzed hydrogenation of a-dehydroamino acid derivatives.86,863 Knochel has independently reported a class of FERRIPHOS (MandyPhos) with similar structural features. All these ligands have provided excellent... 

Some other efficient chiral bisphosphane ligands have been listed in Figure 8. Those include Achiwa s BPPM,125 and a series of modified BPPM ligands such as BCPM and MOD-BPPM 126,126a 126j some excellent chiral... 

This chapter describes atropisomeric biaryl bisphosphine ligands modified DIOP-type ligands P-chiral bisphosphane ligands other bisphosphane ligands and their applications in the enantioselective hydrogenation of olefins. 

Fig. 26.4 Chiral bisphosphane ligands based on DIOP modifications.

Chiral Bisphosphane Ligands Based on the Modification of DIOP... 

Recently, many effective chiral bisphosphane hgands with a ferrocene backbone have been developed (Scheme 1.4). Ito has successfully developed a series of traits-chelating bisphosphane hgands, TRAPs, which are highly selective for rhodium-catalyzed asymmetric hydrogenation [46]. 

Two C2-symmetric bisphosphane hgands, namely Kang s FerroPhos [50] and Kno-chel s FFRRIPHOS (MandyPhos) [51], have provided excellent enantioselectivities in... 

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