Abstract
Stereocontrol in the asymmetric phosphonylation of aldehydes via organophosphorus esters is a function of the topology of the chiral reagents employed. We report here on the diastereoselective phosphonylation of selected unsaturated organic substrates using diazaphospholidine reagents based on the N,N′-bis[1-(S)-phenylethyl]-1,2-ethylenediamine auxiliary which affords a different profile of selectivities to those reported previously using diazaphospholidine reagents containing the N.N′-(dineopentyl)-trans-1,2-diaminocyclohexane auxiliary.
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