Solvent-controlled highly regio-selective thieno[2,3-<i>b</i>]indole formation under metal-free conditions
作者:Penghui Ni、Bin Li、Huawen Huang、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c7gc02818k
日期:——
An efficient three-component thieno[2,3-b]indole formation has been developed under metal-free conditions. The cascade cyclization was enabled by the acid-promoted annulation of indoles, ketones and sulfur powder, which provided modular synthesis of 2-substituted and 3-substituted thieno[2,3-b]indoles with excellent regioselectivity and broad functional group tolerance. DMF solvent played an important
One-pot multicomponent synthesis of thieno[2,3-<i>b</i>]indoles catalyzed by a magnetic nanoparticle-supported [Urea]<sub>4</sub>[ZnCl<sub>2</sub>] deep eutectic solvent
作者:The Thai Nguyen、Phuong Hoang Tran
DOI:10.1039/d0ra00773k
日期:——
In this study, we have developed the synthesis of thieno[2,3-b]indole dyes via a multicomponent reaction of cheap and available reagents such as sulfur, acetophenones, and indoles using a magnetic nanoparticle-supported [Urea]4[ZnCl2] deep eutectic solvent as a green catalyst. The synthesis of a series of diversely functionalized thieno[2,3-b]indole has been successfully performed in a one-pot reaction
Three-Component Thieno[2,3-<i>b</i>]indole Synthesis from Indoles, Alkenes or Alkynes and Sulfur Powder under Metal-Free Conditions
作者:Bin Li、Penghui Ni、Huawen Huang、Fuhong Xiao、Guo-Jun Deng
DOI:10.1002/adsc.201701106
日期:2017.12.19
A Bronsted acid promoted three-component synthesis of substituted thieno[2,3-b]indole has been developed starting from indoles, alkenes or alkynes, and sulfur powder. N,N-Dimethylformamide plays an important role to convert the starting materials into the fused products. Various functional groups attached to substrates were well tolerated to afford the corresponding products in moderate to good yields
从吲哚,烯烃或炔烃和硫粉开始,开发了布朗斯台德酸促进的三组分合成取代的噻吩并[2,3- b ]吲哚。N,N-二甲基甲酰胺在将起始原料转化为熔融产物中起着重要作用。在非常简单的反应条件下,可以很好地耐受与底物相连的各种官能团,从而以中等至良好的产率获得相应的产物。