Diastereoselective Hydroxyalkylation of Enantiomerically Pure 2‐Alkenylsulfoximides

Excellent asymmetric induction stems from the chiral center at sulfur in the new asymmetric C3 building blocks 1 and 2. These compounds have an unusual property useful for C1-substituted chiral allyl transfer agents: the lithiated intermediates are configurationally labile. Subsequent reactions can be carried out stereoconvergently to give diastereomerically and enantiomerically pure products. H2NVal = O-trimethylsilylvalinol.