Au-Catalyzed Synthesis of Thiopyrano[2,3-<i>b</i>]indoles Featuring Tandem Rearrangement and Hydroarylation
作者:Mukund Jha、Shiv Dhiman、T. Stanley Cameron、Dalip Kumar、Anil Kumar
DOI:10.1021/acs.orglett.7b00617
日期:2017.4.21
heteroaromatic thiopyrano[2,3-b]indole is reported using conjugated enyne tethered indole sulfides, featuring skeletal rearrangement conjoined with intramolecular hydroarylation (via C3–H functionalization of the indole core) and oxidative aromatization. Subsequent Pd-catalyzed C–C coupling resulted in a 16-π electron heteroaromatic isothiochromeno[1,8,7-bcd]indole.
据报道,使用共轭烯键式吲哚硫化物进行金(III)催化的14-π电子杂芳族硫吡喃并[2,3- b ]吲哚的合成,其骨架重排与分子内氢芳基化作用(通过吲哚核的C3-H功能化)和氧化芳构化。随后的Pd催化的C–C偶联导致16-π电子杂芳族异硫氰酸色素[1,8,7- bcd ]吲哚。
Concise Syntheses of the Cruciferous Phytoalexins Brassilexin, Sinalexin, Wasalexins, and Analogues: Expanding the Scope of the Vilsmeier Formylation
作者:M. Soledade C. Pedras、Mukund Jha
DOI:10.1021/jo0479866
日期:2005.3.1
the Vilsmeierformylation to indoline-2-thiones followed by a new aqueous ammonia workup procedure. Similarly, a very concise two-pot synthesis of the phytoalexins wasalexins using sequential formylation−amination of indolin-2-ones is described. Remarkably, this novel aqueous ammonia workup allows the sequential one-pot formylation−amination, expanding substantially the scope of the Vilsmeier formylation
Access to Substituted Dihydrothiopyrano[2,3-<i>b</i>]indoles via Sequential Rearrangements During <i>S</i>-Alkylation and Au-Catalyzed Hydroarylation on Indoline-2-thiones
作者:Mukund Jha、Ganesh M. Shelke、T. Stanley Cameron、Anil Kumar
DOI:10.1021/jo5025943
日期:2015.5.15
the synthesis of indole-fused dihydrothiopyrans has been developed from indoline-2-thiones. The protocol involves the synthesis of conjugated ene-yne-substituted indole-sulfides, a gold(III)-catalyzed rearrangement of the ene-yne sidechain followed by intramolecular hydroarylation via C3–H functionalization of the indole core. This new synthesis of functionalized tricyclic indole derivatives through
Remote stereocontrolled asymmetric 1,6-addition/1,4-addition cascade reactions between cyclic dienones and 2-indolinethiones
作者:Xiaohua Sun、Jie Fei、Chuncheng Zou、Min Lu、Jinxing Ye
DOI:10.1039/c6ra19916j
日期:——
Enantioselective 1,6-addition/1,4-addition cascade reactions between cyclic dienones and 2-indolnethiones have been realized, affording chiral spiro[thiopyranoindole-cyclohexanone] scaffolds facilely and efficiently.
Synthesis of indole-annulated sulfur heterocycles using copper-catalysed C–N coupling and palladium-catalysed direct arylation
作者:Ganesh M. Shelke、Mukund Jha、Anil Kumar
DOI:10.1039/c6ob00117c
日期:——
A simple and efficient method for the synthesis of biologically relevant 5H-benzo[4,5][1,3]thiazino[3,2-a]indoles and 5,7-dihydroisothiochromeno[3,4-b]indoles has been developed via intramolecular copper catalysed Ullmann-type C–N coupling and palladium catalysed direct arylation from the corresponding precursors 2-(2-bromobenzylthio)-1H-indole and 2-(2-bromobenzylthio)-1-methyl-1H-indole, respectively
一种简单有效的合成生物学上相关的5 H-苯并[4,5] [1,3]噻嗪基[3,2- a ]吲哚和5,7-二氢异硫代色素[3,4- b ]吲哚的方法开发通过分子内铜催化的Ullmann型C-N偶联和钯从相应的前体2-(2- bromobenzylthio)-1催化芳基化直接ħ -吲哚和2-(2- bromobenzylthio)-1-甲基-1- ħ -吲哚,分别具有良好至优异的产量。