Enantioselective Organocatalyzed Direct α-Thiocyanation of Cyclic β-Ketoesters by <i>N</i>-Thiocyanatophthalimide
作者:Jiashen Qiu、Di Wu、Pran Gopal Karmaker、Hongquan Yin、Fu-Xue Chen
DOI:10.1021/acs.orglett.8b00342
日期:2018.3.16
the bifunctional cinchona alkaloid catalysis. Thus, a variety of chiral α-thiocyanato β-ketoesters with a quaternary carbon center have been achieved in excellent yields (up to 99%) and high enantioselectivities (up to 94% ee) in a convenient manner.
合成了一种新的亲电子硫氰化试剂N -thiocyanatophthalimide,并通过双功能金鸡纳生物碱催化将其应用于各种环状β-酮酸酯的催化不对称亲电子α-硫氰化反应的第一个实例。因此,已经以方便的方式以优异的产率(高达99%)和高的对映选择性(高达94%ee)获得了具有季碳中心的多种手性α-硫氰酸根合β-酮酸酯。