Total Synthesis of Iheyamine A via the Cyanide-Catalyzed Imino-Stetter Reaction
作者:Jiye Jeon、Hyung Joo Kim、Cheol-Hong Cheon
DOI:10.1021/acs.joc.0c01051
日期:2020.6.19
The totalsynthesis of iheyamine A from readily available ethyl 2-aminocinnamate and 5-methoxyindole-2-carboxaldehyde is described. The cyanide-catalyzed imino-Stetter reaction of an aldimine derived from ethyl 2-aminocinnamate and 5-methoxyindole-2-carboxaldehyde provided the desired unsymmetrical 2,2′-bisindole-3-acetic acid derivative. The subsequent introduction of an amino group at the C-3′ position
Visible‐Light‐Driven Isocyanide Insertion to
<i>o</i>
‐Alkenylanilines: A Route to Isoindolinone Synthesis
作者:Anjali Dahiya、Bubul Das、Ashish Kumar Sahoo、Bhisma K. Patel
DOI:10.1002/adsc.202101431
日期:2022.3
intermolecular radical insertion of isocyanides to electron-deficient o-alkenylanilines leading to isoindolinone is reported. Deuterium (D2O) and H2O18 labelling experiments suggest H and O incorporation in the product. The formation of an N-centered radical (NCR) via stepwise PT/ET process was confirmed by radical trapping experiments, photoluminescence, cyclic voltammetry and DFT studies. This photo cascade methodology
报道了可见光介导的异氰化物分子间自由基插入到缺电子的o-烯基苯胺,导致异吲哚啉酮。氘 (D 2 O) 和 H 2 O 18标记实验表明产品中含有 H 和 O。通过自由基捕获实验、光致发光、循环伏安法和 DFT 研究证实了通过逐步 PT/ET 过程形成N中心自由基 (NCR) 。这种光级联方法总体上是一种氧化还原中性工艺,具有无金属条件和广泛的基材范围(32 个示例)。GABA 受体拮抗剂类似物的合成显示了该方法的实用性。
A Highly Efficient Copper(I)-Catalyzed Cascade Reaction of<i>o</i>-Alkenylphenyl Isothiocyanates with Isocyanides Leading to 5<i>H</i>-Benzo[<i>d</i>]imidazo[5,1-<i>b</i>][1,3]thiazines
作者:Wenyan Hao、Jian Huang、Shanshan Jie、Mingzhong Cai
DOI:10.1002/ejoc.201500800
日期:2015.10
The highlyefficientcopper(I)-catalyzedcascadereaction of (E)-3-(2-isothiocyanatophenyl)acrylates and (E)-3-(2-isothiocyanatophenyl)acrylonitriles with isocyanides was explored. The method provides an expedient route for the synthesis of 5H-benzo[d]imidazo[5,1-b][1,3]thiazines in good to excellent yields by using CuCl (10 mol-%) as the catalyst and K3PO4 (2.0 equiv.) as the base in THF at 70 °C
A general strategy for the synthesis of indoloquinolizine alkaloids <i>via</i> a cyanide-catalyzed imino-Stetter reaction
作者:Eunjoon Park、Cheol-Hong Cheon
DOI:10.1039/c7ob02691a
日期:——
A new strategy applicable to the synthesis of indoloquinolizine natural products has been developed. A cyanide-catalyzed intramolecular imino-Stetter reaction of aldimines, derived from 2-aminocinnamic acid derivatives and 2-pyridinecarboxaldehydes, provided indole-3-acetic acid derivatives bearing a pyridyl ring at the 2-position. Reduction of the carboxylic acid moiety to an alcohol followed by activation
Synthesis of 2-Vinylindole-3-Acetic Acid Derivatives via Cyanide-Catalyzed Imino-Stetter Reaction
作者:Hong-Ahn Seo、Cheol-Hong Cheon
DOI:10.1021/acs.joc.6b01621
日期:2016.9.2
for the synthesis of 2-vinylindole-3-acetic acidderivatives from aldimines, which are derived from 2-aminocinnamic acidderivatives and α,β-unsaturated aldehydes, via a cyanide-catalyzed imino-Stetter reaction is described. Various types of 2-aminocinnamic acidderivatives and α,β-unsaturated aldehydes could be used in this protocol, and the desired 2-vinyl substituted indole-3-acetic acid derivatives