Highly Enantioselective Construction of Spiro[<i>4H</i>-pyran-3,3′-oxindoles] Through a Domino Knoevenagel/Michael/Cyclization Sequence Catalyzed by Cupreine
via a domino Knoevenagel/Michael/cyclization sequence with cupreine as catalyst have been developed. A wide range of optically active spiro[4H-pyran-3,3′-oxindoles] were obtained in excellent yields (up to 99%) with good to excellent enantioselectivities (up to 97%) from simple and readily available starting materials under mild reaction conditions. These heterocyclic spirooxindoles will provide promising
已经开发了通过多米诺Knoevenagel / Michael /环化序列的第一个对映选择性有机催化的二元和三元反应,并以铜嘌呤为催化剂。在温和的条件下,从简单易得的起始原料中,以优异的收率(高达99%)和良好的至优异的对映选择性(高达97%)获得了广泛的旋光螺旋[ 4H -pyran-3,3'-oxindoles]反应条件。这些杂环螺硫辛醇将为化学生物学和药物发现提供有希望的候选物。