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