Photocatalyzed Intramolecular [2+2] Cycloaddition of
<i>N</i>
‐Alkyl‐
<i>N‐(</i>
2‐(1‐arylvinyl)aryl)cinnamamides
作者:Wanderson C. Souza、Bianca T. Matsuo、Priscilla M. Matos、José Tiago M. Correia、Marilia S. Santos、Burkhard König、Marcio W. Paixão
DOI:10.1002/chem.202003641
日期:2021.2.19
N‐Alkyl‐N‐(2‐(1‐arylvinyl)aryl)cinnamamides are converted into natural product inspired scaffolds via iridium photocatalyzed intramolecular [2+2] photocycloaddition. The protocol has a broad substrate scope, whilst operating under mild reaction conditions. Tethering four components forming a trisubstituted cyclobutane core builds rapidly high molecular complexity. Our approach allows the design and
N-烷基-N-( 2-(1-芳基乙烯基)芳基)肉桂酰胺通过铱光催化的分子内[2 + 2]光环加成反应转变为天然产物。该协议具有广泛的底物范围,同时在温和的反应条件下运行。束缚形成三取代的环丁烷核心的四个成分会迅速建立高分子复杂性。我们的方法允许设计和合成多种四氢环丁酮[ c ]喹啉-3(1 H)-酮,产率在20–99%之间,并且具有出色的区域选择性和非对映选择性。此外,已证明在环丁烷环断裂后,1,7-烯炔的分子内[2 + 2]-环加成反应会导致类似烯炔的复分解。
Palladium-catalyzed direct coupling of 2-vinylanilines and isocyanides: an efficient synthesis of 2-aminoquinolines
作者:Lijie Wang、Jamie Ferguson、Fanlong Zeng
DOI:10.1039/c5ob01659b
日期:——
A variety of 2-aminoquinolines were prepared in good to excellent yields.
一系列2-氨基喹啉以良好至优异的产率制备完成。
UV-Light-Irradiated Trifluoromethylation of Diheteroaryl Disulfides with CF<sub>3</sub>
SO<sub>2</sub>
Na
作者:Bao-Qian Cao、Yi-Feng Qiu、Xi Zhang、Zheng-He Zhu、Zheng-Jun Quan、Xi-Cun Wang
DOI:10.1002/ejoc.201801565
日期:2019.2.14
A trifluoromethylation of diheteroaryldisulfides with CF3SO2Na to afford the trifluoromethyl thioethers derivatives. The conversion has good functional group compatibility, without external photocatalyst, generating the corresponding products in moderate to good yields under mild conditions, and the disulfide is fully utilized while constructing two S‐CF3 bonds.
用CF 3 SO 2 Na对二杂芳基二硫化物进行三氟甲基化,得到三氟甲基硫醚衍生物。该转化具有良好的官能团相容性,无需外部光催化剂,在温和的条件下以中等至良好的产率生成了相应的产物,并且在构建两个S-CF 3键的同时充分利用了二硫键。
Palladium-Catalyzed Sequential Vinylic C–H Arylation/Amination of 2-Vinylanilines with Aryl boronic Acids: Access to 2-Arylindoles
作者:Ruixia Yu、Dejun Li、Fanlong Zeng
DOI:10.1021/acs.joc.7b02728
日期:2018.1.5
A palladium-catalyzed selective and successive vinylic C–H arylation/amination of 2-vinylanilines with arylboronic acids to generate indoles has been developed. This procedure represents a straightforward and practical approach to valuable multifunctionalized indoles.
Iron-Promoted Construction of Indoles via Intramolecular Oxidative C–N Coupling of 2-Alkenylanilines Using Persulfate
作者:Menglan Wang、Yudong Li、Qing-An Wu、Shuping Luo、Yuehui Li
DOI:10.1055/s-0037-1611521
日期:2019.8
K2S2O8/FeF2 system offers a direct and benign syntheticroute to 3-arylindoles and it is applicable to a wide range of substitutedindoles including drug intermediates. Indole scaffold synthesis relies primarily on oxidative C–H amination of N-protected alkenylanilines for C–N intramolecular cyclization reactions. Herein, for the first time, without N-protection, various readily prepared 2-alkenylanilines were
抽象的 吲哚支架的合成主要依靠N保护的链烯基苯胺的C–H氧化胺化作用进行C–N分子内环化反应。在此,在没有催化N的情况下,通过在催化量的FeF 2存在下使用K 2 S 2 O 8作为氧化剂,将各种容易制备的2-烯基苯胺以高收率转化成所需的吲哚产物。K 2 S 2 O 8 / FeF 2系统为3-芳基吲哚提供了直接而良性的合成途径,适用于包括药物中间体在内的各种取代的吲哚。 吲哚支架的合成主要依靠N保护的链烯基苯胺的C–H氧化胺化作用进行C–N分子内环化反应。在此,在没有催化N的情况下,通过在催化量的FeF 2存在下使用K 2 S 2 O 8作为氧化剂,将各种容易制备的2-烯基苯胺以高收率转化成所需的吲哚产物。K 2 S 2 O 8 / FeF 2系统为3-芳基吲哚提供了直接而良性的合成途径,适用于包括药物中间体在内的各种取代的吲哚。