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。
Nickel(<scp>ii</scp>)-catalyzed asymmetric thio-Claisen rearrangement of α-diazo pyrazoleamides with thioindoles
A nickel(II) catalyzed enantioselective thio-Claisen rearrangement of α-diazo pyrazoleamides with thioindoles was realized with modified chiral N,N′-dioxide ligands, affording a variety of C3-substituted indole derivatives in high yields (up to 95%) with excellent enantioselectivities (up to 96% ee) undermild reaction conditions. A possible transition state model was proposed based on previous reports
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。
A facile protocol for the preparation of 2-carboxylated thieno [2,3-<i>b</i>] indoles: a <i>de novo</i> access to alkaloid thienodolin
作者:Giacomo Mari、Lucia De Crescentini、Gianfranco Favi、Stefania Santeusanio、Fabio Mantellini
DOI:10.1039/d2ob00440b
日期:——
3-dienes and indoline 2-thione and requires mild reaction conditions. Furthermore, the easy work-up required makes this method amenable for a one-pot approach as demonstrated in the preparation of thienodolin, a natural product isolated from Streptomyces albogriseolus that exhibits valuable biological properties.
已成功开发出一种无金属策略,可替代已知的复杂环加成反应,生成 2-羧化噻吩并 [2,3- b ] 吲哚衍生物。新方法涉及作为起始材料易于获得的 1,2-二氮杂-1,3-二烯和二氢吲哚 2-硫酮,并且需要温和的反应条件。此外,所需的简单后处理使该方法适用于一锅法,如噻吩多林的制备所证明的那样,噻吩多林是一种从白灰链霉菌中分离出来的天然产物,具有有价值的生物学特性。