Asymmetric Inverse-Electron-Demand 1,3-Dipolar Cycloaddition of C,N-Cyclic Azomethine Imines: An Umpolung Strategy
作者:Takuya Hashimoto、Masato Omote、Keiji Maruoka
DOI:10.1002/anie.201100331
日期:2011.4.4
chiral dicarboxylic acid (see scheme). Employment of vinylogous aza‐enamines as novel dipolarophiles was also implemented to establish a new concept of the inverse‐electron‐demand umpolung 1,3‐dipolar cycloaddition. Bz=benzoyl, EDG=electron‐donating group.
Oompa loompa:通过使用轴向手性二羧酸(参见方案),以高立体选择性完成了标题反应。还采用了含乙烯基的氮杂烯胺作为新型的偶极亲和剂,以建立反电子需求的1,3-偶极环加成反电子的新概念。Bz =苯甲酰基,EDG =给电子基团。