LEWIS ACID-MEDIATED REACTION WITH SILYL KETENE ACETALS AND ALLYLSTANNANE OF THE ALUMINUM ACETALS GENERATED BY DIBALH REDUCTION OF ALPHA-AMINO-ACID ESTERS
S. Kiyooka et al., LEWIS ACID-MEDIATED REACTION WITH SILYL KETENE ACETALS AND ALLYLSTANNANE OF THE ALUMINUM ACETALS GENERATED BY DIBALH REDUCTION OF ALPHA-AMINO-ACID ESTERS, Tetrahedron letters, 34(36), 1993, pp. 5729-5732
The intermediates generated by DIBALH reduction of alpha-amino acid es
ters undergo condensation without racemization with silyl ketene aceta
ls and allylstannane in the presence of Lewis acid to afford the corre
sponding beta-hydroxy esters and homoallylic alcohols in good yields w
hile achieving high syn selectivity via an aluminum-assisted chelation
control.