Catalytic asymmetric synthesis of 3-hydroxyl-2-oxindoles via enantioselective Morita–Baylis–Hillman reaction of isatins
作者:Ci-Ci Wang、Xin-Yan Wu
DOI:10.1016/j.tet.2011.02.045
日期:2011.4
The enantioselective Morita–Baylis–Hillman reaction of acrylates to isatins was investigated for the first time, employing bifunctional phosphinothiourea organocatalysts based on chiral cyclohexane scaffold. The 3-hydroxyl-2-oxindole derivatives were obtained in excellent yields with moderate enantioselectivity (up to 69% ee) in the presence of 10 mol % catalyst 1b.
首次使用基于手性环己烷骨架的双官能膦硫脲有机催化剂,研究了丙烯酸酯与靛红的对映选择性Morita-Baylis-Hillman反应。在10mol%催化剂1b的存在下,以优异的产率和适度的对映选择性(高达69%ee)获得了3-羟基-2-氧吲哚衍生物。