Highly Diastereoselective Asymmetric Mannich Reactions of 1,3-Dicarbonyls with Acyl Imines
摘要:
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.
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
[EN] CHIRAL AMINE-CATALYZED ASYMMETRIC ADDITION OF CARBON-CENTERED NUCLEOPHILES TO IMINES<br/>[FR] ADDITION ASYMETRIQUE CATALYSEE PAR UNE AMINE CHIRALE DE NUCLEOPHILES CARBONES SUR DES IMINES
申请人:UNIV BOSTON
公开号:WO2007011910A2
公开(公告)日:2007-01-25
[EN] The present invention relates to an asymmetric synthesis useful for preparing compounds useful for the treatment of cardiovascular diseases and for studying the role of motor proteins in cell cycle progression. [FR] La présente invention porte sur une synthèse asymétrique utilisée pour préparer des composés utilisés servant au traitement de maladies cardiovasculaires et pour étudier le rôle de protéines motrices dans la progression d'un cycle cellulaire.
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.