Heterometallocenes

I 7.5 Neii> Chiral Ligands Based on Substituted Heterometallocenes... 

The inherent planar chirality of substituted phosphaferrocenes can be exploited for the diastereoselective deriva-tization of the heterometallocenes themselves. This is nicely illustrated by the preparation of the alcohol derivative 323 as a single diastereomer (cf. LiAlH4 reduction of 307, which affords a 1 1 mixture of diastereomers Scheme 107) <1998CEJ2148>. Alcohol 323 was then used to prepare the enantiomerically pure P,P-diphosphoms ligand 324. 

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