Vanadium-Catalyzed Addition of Propargyl Alcohols and Imines
作者:Barry M. Trost、Cheol K. Chung
DOI:10.1021/ja064011p
日期:2006.8.1
A Mannich-type addition of propargylic alcohols and N-methoxycarbonylimines has been achieved by using a vanadium catalyst. The reactivity of the vanadium catalyst could be modulated by modifying the silanol ligands to avoid the background reaction. The strategy described herein provides an atom-economical access to beta-aryl-substituted Z-enones with an allylic amino functional group, which are not
A general organic catalyst for asymmetric addition of stabilized nucleophiles to acyl imines
作者:Christiane M. Bode、Amal Ting、Scott E. Schaus
DOI:10.1016/j.tet.2006.07.071
日期:2006.12
Cinchona alkaloid-derived thiourea catalysts promote nucleophilic additions to acyl imines for the asymmetric synthesis of secondary amine adducts. The hydroquinine-derived thiourea catalyst efficiently promotes the aza-Henry reaction of nitroalkane with acyl imines, affording β-nitroamines in good yields with enantioselectivities of 90–98% ee and diastereoselectivities up to 97%. The scope of the
Highly Diastereoselective Asymmetric Mannich Reactions of 1,3-Dicarbonyls with Acyl Imines
作者:Amal Ting、Sha Lou、Scott E. Schaus
DOI:10.1021/ol060304b
日期:2006.5.1
The cinchona alkaloids catalyze direct asymmetric Mannich reactions of cyclic 1,3-dicarbonyl compounds with acyl imines to afford a-quaternary carbon-bearing reaction products in yields of up to 98%, a diastereomeric excess of 90% or greater, and enantioselectivities up to 99% ee. A model is proposed that accounts for both the observed diastereoselectivities and the enantioselectivities for the reactions.
WO2007/11910
申请人:——
公开号:——
公开(公告)日:——
Vanadium-Catalyzed anti-Selective Additions of Allenols to Imines