Catalytic Asymmetric 1, 3-Dipolar Cycloaddition Reaction of Nitrones with α′-Phosphoric Enones by a Chiral Ligand- Copper(II) Triflate Complex
作者:Kyoung-Chan Lim、Young-Taek Hong、Sunggak Kim
DOI:10.1002/adsc.200700377
日期:2008.2.22
Using the C2-symmetric bis-oxazoline copper(II) catalyst 6f as a chiral Lewis acid, α′-phosphoric enones 2 undergo 1,3-dipolar cycloaddition with nitrones 3 to provide isoxazolidines 4 with very high enantioselectivity and endo/exo selectivity.
使用C 2对称的双恶唑啉铜(II)催化剂6f作为手性路易斯酸,α'-磷酸烯酮2与硝酮3进行1,3-偶极环加成,以提供具有非常高的对映选择性和内/外选择性的异恶唑烷4。