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
Organocatalytic Enantioselective Michael‐Aldol[3+2] Annulation for the Synthesis of Nitro‐Methanobenzo[7] annulenes
作者:Yang Zhang、Jin‐Yu Liu、Xiao‐Hai Zhang
DOI:10.1002/ejoc.202100974
日期:2021.9.21
An enantioselective Michael-Aldol[3+2] annulation via bifunctional thiourea catalysis has been reported, and a series of nitro-methanobenzo[7]annulenes with potential biological activities were synthesized in good yields with excellent enantio- and diastereoselectivities.
Organocatalytic Highly Enantioselective Michael Addition of 2-Hydroxy-1,4-naphthoquinones to Nitroalkenes
作者:Wen-Ming Zhou、Han Liu、Da-Ming Du
DOI:10.1021/ol800945e
日期:2008.7.3
The first organocatalytic enantioselective Michaeladdition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes for the direct synthesis of chiral nitroalkylated naphthoquinone derivatives was investigated. Good yields and excellent enantioselectivities (up to >99% ee) could be achieved. This organocatalyticasymmetricMichaeladdition provides an efficient route toward the synthesis of optically active
An efficient one-potsynthesis of 2H-pyranonaphthoquinone was achieved via a palladium-catalyzed C–H bondactivation/C–Cbond formation/intramolecular Tsuji–Trost reaction cascade. The unprecedented procedure exhibits excellent functional group tolerance, giving the target naphthoquinones in moderate to good isolated yields (40–88%) under mild reaction conditions. Scalable production of the product
Palladium(II)-Catalyzed Reaction of Lawsones and Propargyl Carbonates: Construction of 2,3-Furanonaphthoquinones and Evaluation as Potential Indoleamine 2,3-Dioxygenase Inhibitors
An efficient reaction utilizing propargyl carbonates through Claisen rearrangement to synthesize furanonaphthoquinones is described. The remarkable transformation exhibits excellent functional group tolerance, affording the target furanonaphthoquinones in moderate to good yields (41–85%) undermildreactionconditions. Scaled-up preparation of the model product can make this reaction a method of choice