K. Iseki et al., ASYMMETRIC ALLYLATION OF AROMATIC-ALDEHYDES CATALYZED BY CHIRAL PHOSPHORAMIDES PREPARED FROM (S)-PROLINE, Tetrahedron, 53(10), 1997, pp. 3513-3526
Chiral phosphoramides prepared from (S)-proline were used to catalyze
the allylation and crotylation of aromatic aldehydes with allylic tric
hlorosilanes in good enantioselective yields. Phosphoramides 4d and 4m
gave chiral homoallylic alcohols and their enantiomers, respectively,
with similar levels of enantioselectivity. (C) 1997 Elsevier Science
Ltd.