Design of Structurally Rigid <i>trans</i>-Diamine-Based Tf-Amide Organocatalysts with a Dihydroanthracene Framework for Asymmetric Conjugate Additions of Heterosubstituted Aldehydes to Vinyl Sulfones
作者:Shin A. Moteki、Senmiao Xu、Satoru Arimitsu、Keiji Maruoka
DOI:10.1021/ja107897t
日期:2010.12.8
Asymmetric conjugate addition of α-heterosubstituted aldehydes such as α-amido and α-alkoxy aldehydes to vinyl sulfone was effected under the influence of structurally rigid trans-diamine-based Tf-amido organocatalyst (S,S)-2 with a dihydroanthracene framework to furnish α,α-dialkyl(amido)aldehydes and α,α-dialkyl(alkoxy)aldehydes with high enantioselectivity. The chiral efficiency of the structurally
在结构刚性的基于反式二胺的 Tf-酰胺基有机催化剂 (S,S)-2 和二氢蒽骨架的影响下,α-杂取代的醛如 α-酰胺和 α-烷氧基醛与乙烯基砜的不对称共轭加成可实现提供具有高对映选择性的 α,α-二烷基(酰氨基)醛和 α,α-二烷基(烷氧基)醛。与具有相似功能的 (S,S)-1 和 (S,S)-4 相比,结构独特的催化剂 (S,S)-2 的手性效率是显而易见的。