Silver/ThioClickFerrophos-Catalyzed 1,3-Dipolar Cycloaddition and Tandem Addition–Elimination Reaction of Morita–Baylis–Hillman Adducts
作者:Yuko Suzuki、Kazuya Kanemoto、Ayana Inoue、Kazumi Imae、Shin-ichi Fukuzawa
DOI:10.1021/acs.joc.1c01440
日期:2021.11.5
The asymmetric 1,3-dipolar cycloaddition of glycine imino esters to Morita–Baylis–Hillman (MBH) adducts or acetylated MBH adducts is described. The reaction was efficiently catalyzed by AgOAc/(R,Sp)-ThioClickFerrophos at room temperature to afford pyrrolidine derivatives bearing a quaternary carbon as a single diastereomer with excellent enantioselectivity. When a cyclic pyrroline ester was used as
描述了甘氨酸亚氨基酯与 Morita-Baylis-Hillman (MBH) 加合物或乙酰化 MBH 加合物的不对称 1,3-偶极环加成。该反应在室温下被 AgOAc/( R , S p )-ThioClickFerrophos 有效催化,得到具有良好对映选择性的单一非对映异构体季碳吡咯烷衍生物。当使用环状吡咯啉酯代替甘氨酸亚氨基酯作为亲核试剂时,与乙酰化 MBH 加合物的对映选择性串联加成-消除反应以优异的产率和对映选择性进行,从而形成外-烯烃。这些反应的广泛底物范围和产物的可转化性使得能够以光学纯方式快速获得不同的多功能化吡咯烷。