anol trimethylsilyl ether), was realized. Interesting aspects, such as 1,4-asymmetricinduction by the remote sulfinyl group of the aldehyde but also the stereochemical control and kinetic resolution of the racemic substrate by the chiral organocatalyst were examined. Finally, an unexpected stereoselective retro-aldol reaction catalyzed by l-proline was pointed out.
New chiral imino- and amino-sulfoxides as activators of allyl trichlorosilane in the asymmetric allylation of aldehydes
作者:Vincenzo De Sio、Maria Rosaria Acocella、Rosaria Villano、Arrigo Scettri
DOI:10.1016/j.tetasy.2010.04.015
日期:2010.6
Chiral 2-methylsulfinyl benzaldehyde proved to be a valuable starting material for a convenient approach towards a variety of imino- and amino-sulfoxides. The catalytic properties of these new ligands, as potential activators of allyl trichlorosilane, have been exploited in new catalytic procedures for the synthesis of enantioenriched homoallylic alcohols. (C) 2010 Elsevier Ltd. All rights reserved.
A catalytic asymmetric allylation of aldehydes with allyl trichlorosilane activated by a chiral tetradentate bis-sulfoxide
作者:Antonio Massa、Maria Rosaria Acocella、Vincenzo De Sio、Rosaria Villano、Arrigo Scettri
DOI:10.1016/j.tetasy.2009.01.023
日期:2009.2
Chiral homoallylicalcohols are easily accessible by asymmetric allylation of aldehydes with allyl trichlorosilane in the presence of catalytic amounts of a chiral tetradentate bis-sulfoxide, as organocatalyst, whose synthesis is reported.