Palladium‐Catalyzed Diastereoselective α‐Allylation of Chiral Sulfinimines
作者:Jiangnan Li、Shende Jiang、George Procopiou、Robert A. Stockman、Guang Yang
DOI:10.1002/ejoc.201600615
日期:2016.7
The first diastereoselectiveallylation reaction at the α-position of ketones by using tert-butanesulfinamide as a chiral auxiliary is explored. Excellent yields and high diastereomeric ratios were achieved under palladium catalysis in the presence of a readily available achiral phosphine ligand. The chiral auxiliary was removed in quantitative yield under the optimized conditions without any racemization
Reversal of Diastereofacial Selectivity in Hydride Reductions of <i>N</i>-<i>tert</i>-Butanesulfinyl Imines
作者:John T. Colyer、Neil G. Andersen、Jason S. Tedrow、Troy S. Soukup、Margaret M. Faul
DOI:10.1021/jo0609834
日期:2006.9.1
same sulfinyl imine starting materials and changing the reductant to L-Selectride, the stereoselectivity could be efficiently reversed to afford the opposite product diastereomer in high yield and selectivity.
One-Pot Asymmetric Synthesis of Either Diastereomer of <i>tert</i>-Butanesulfinyl-protected Amines from Ketones
作者:Jessica Tanuwidjaja、Hillary M. Peltier、Jonathan A. Ellman
DOI:10.1021/jo0616512
日期:2007.1.1
[GRAPHIC]A one-pot method for the asymmetric synthesis of tert-butanesulfinyl-protected amines is described. Condensation of aryl alkyl and dialkyl ketones with tert-butanesulfinamide followed by in situ reduction with the appropriate reagent provides either diastereomer of the sulfinamide products in good yields and with diastereomeric ratios of up to 99:1.