Green route for the synthesis of 3-substituted indoles using [bmim]HSO4 as non-halogenated ionic liquid
作者:Maral Shekarchi、Farahnaz K. Behbahani、Maryam Shekarchi
DOI:10.1007/s00706-021-02782-y
日期:2021.6
this paper, an effective procedure is reported for the synthesis of 3-substituted indoles via the one-pot three-component reaction of an aldehyde, malononitrile or ethyl cyanoacetate and indole in the presence of [bmim]HSO4 in ethanol under reflux condition. The advantages of this protocol are the synthesis of some novel 3-substituted indoles containing furyl, 4-hydroxyphenyl, and styryl nuclei that
A sulfonic-acid-functionalized ionic liquid is used as a Bronsted acid catalyst for the efficientsynthesis of indolederivatives in good-to-high yields at room temperature undersolvent-free condi...
Electrochemical approach for synthesis of 3-substituted indole derivatives
作者:Vinay K. Singh、Rahul Dubey、Abhishek Upadhyay、Laxmi Kant Sharma、Rana Krishna Pal Singh
DOI:10.1016/j.tetlet.2017.09.003
日期:2017.11
An efficient and economical method was developed for synthesis of 3-substituted indole by using electrochemically induced condensation of various aldehyde, indole and malononitrile.
Deep eutectic solvent: An efficient and green catalyst for the three-component condensation of indoles, aromatic aldehydes, and activated methylene compounds
The deep eutectic solvent-catalyzed multicomponent reaction of aldehydes, indoles, and activated methylene compounds under sonication has been developed. The method proceeded well for a wide scope of substrates under mild condition to afford 3-substituted indoles in moderate to good yields. Interestingly, no additives or solvents are used for the protocol. Moreover, the deep eutectic solvent (zinc
Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) as a magnetically recyclable heterogeneous catalyst for the efficient synthesis of 2-indolyl-1-nitroalkanes and bis(indolyl)methanes
作者:Sara Sobhani、Roya Jahanshahi
DOI:10.1039/c3nj40899j
日期:——
Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) was used as a new magnetically recyclable heterogeneous catalyst for the efficient synthesis of indole derivatives, such as 2-indolyl-1-nitroalkanes and bis(indolyl)methanes.