Highly Enantioselective Synthesis of Chiral Pyranonaphthoquinone-Fused Spirooxindoles through Organocatalytic Three-Component Cascade Reactions
作者:Hong-Wu Zhao、Bo Li、Ting Tian、Wei Meng、Zhao Yang、Xiu-Qing Song、Xiao-Qin Chen、Hai-Liang Pang
DOI:10.1002/ejoc.201500152
日期:2015.5
cinchona-thiourea organocatalyst C1, the developed organocatalytic three-component cascade reaction of isatins, malononitrile, and 2-hydroxynaphthalene-1,4-diones readily proceeded to furnish chiral pyranonaphthoquinone-fused spirooxindoles in excellent chemical yields and high enantioselectivities (up to 99 % yield and 97 % ee). The absolute configurations of the spirooxindoles were assigned on the basis of an X-ray
common in molecular structures with significant biological and pharmaceutical activities. Herein, the organocatalytic asymmetriccascade Michael cyclization reaction of 2-hydroxynaphthalene-1,4-diones to isatylidenemalononitriles has been developed, which provided the desired spiro[4H-benzo[g]chromene-indoline] derivatives in up to 99% yield with up to 99% ee. To illustrate the potential utility of
摘要 吡喃并萘醌单元常见于具有显着生物学和药学活性的分子结构。在此,已开发了2-羟基萘-1,4-二酮与异亚丙基丙二腈的有机催化不对称级联迈克尔环化反应,该反应以高达99%的收率提供了所需的螺[4 H-苯并[ g ]亚甲基二氢吲哚]衍生物具有高达99%的ee。为了说明这些产品的潜在用途,进行了进一步的转化,以中等收率得到了螺多杂环化合物,而不会损失对映选择性(> 99%ee)。这些螺[苯并[ g]的生物学评估[1,5-二甲基二氢吲哚]衍生物对多种癌细胞具有优异的抗增殖活性,在浓度为50μM时具有93%至99%的高抑制率。 吡喃并萘醌单元常见于具有显着生物学和药学活性的分子结构。在此,已开发了2-羟基萘-1,4-二酮与异亚丙基丙二腈的有机催化不对称级联迈克尔环化反应,该反应以高达99%的收率提供了所需的螺[4 H-苯并[ g ]亚甲基二氢吲哚]衍生物具有高达99%的ee。为了说明这些产品的潜在