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2004
Enantioselective syntheses
O 0031
Enantioselective Addition of Dimethylzinc to Aldehydes: Assessment of Optimal
for 2-Dialkylamino-1,1,2-triphenylethanol Ligands. — Some
46- 029 N,N-Substitution
new 2-dialkylamino-1,1,2-triphenylethanol ligands [cf. (III)] bearing flexible alkyl
chains at the nitrogen are synthesized. Their use in the enantioselective addition of
dimethylzinc to aldehydes shows that best results are achieved with the known PTPE.
In the series (III), smaller groups prove to be more efficient. —
(GARCIA-DELGADO, N.; FONTES, M.; PERICAS, M. A.; RIERA, A.;
VERDAGUER*, X.; Tetrahedron: Asymmetry 15 (2004) 13, 2085-2090; Dep. Quim.
Org., Fac. Quim., Univ. Barcelona, E-08028 Barcelona, Spain; Eng.) — S. Adam
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