Phosphoramidite hgands

For example, phosphinamine ligands are not only efficient in the addition of linear organoaluminium reagents to both bulky and non-bulky p-substituted cyclic enones (Scheme 13) but perform particularly well with p-aryl-substituted cyclic enones, giving higher yields and enantioselectivities than phosphoramidite hgands (Scheme 14 versus Scheme 5). 

Tire polymerized or linked monodentate phosphoramidites are no longer monodentate phosphorus hgands, but why were they also discussed in this chapter as monodentate phosphorus hgands in the asymmetric hydrogenation of enamines ... 

Apparently, benzo-anellation of pyrrol is advantageous for the long-term stability of phosphoramidites. Thus, an analog binaphthol-based hgand claimed by Du Pont [10], which was used for comparison, decomposed to an extent of approximately 20% within 10 days of storage at room temperature under argon. 

For a recent example, see Teller, H., Corbet, M., MantiUi, L., Gopakumar, G., Goddard, R., Thiel, W., Fiirstner, A. (2012). One-point binding hgands for asymmetric gold catalysis phosphoramidites with a TADDOL-related but acyclic backbone. Journal of American Chemical Society, 134, 15331-15342. 

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