Iodine-Catalyzed Highly Efficient Synthesis of 3-Alkylated/3-Alkenylated Indoles from 1,3-Dicarbonyl Compounds
作者:Krishna Singh、Neetu Singh
DOI:10.1055/s-0032-1316684
日期:2012.9
Molecular iodine has been found to be an efficient and inexpensive catalyst for the synthesis of 3-alkylated/3-alkenylated indoles in excellent yields by using different indoles and 1,3-dicarbonylcompounds at room temperature.
Synthesis of 3-alkenylated indole and <i>bis</i>(indol-3-yl) derivatives catalyzed by sulfonic acid-functionalized ionic liquid under ultrasound irradiation
作者:Saroj Budania、Ganesh M. Shelke、Anil Kumar
DOI:10.1080/00397911.2016.1278232
日期:2017.4.3
ABSTRACT A simple and efficient protocol has been developed for the synthesis of 3-alkenylated indoles and bis(indol-3-yl) derivatives by sulfonic acid-functionalized ionic liquid-catalyzed reaction of indole with 1,3-diketones/3-ketoesters under solvent-free ultrasound irradiation. Good to excellent yields (68–94%) are obtained in ultrasonication. The product of reaction is dependent on the substituent
Choline chloride based eutectic solvents: direct C-3 alkenylation/alkylation of indoles with 1,3-dicarbonyl compounds
作者:Anita Kailas Sanap、Ganapati Subray Shankarling
DOI:10.1039/c4ra05858e
日期:——
C-3 alkenylation/alkylation of indoles depends on the position of the substituent on the indole used in the reaction. C-2 substituted indole results in the formation of C-3 alkenylated indole derivatives, whereas plain indole gives rise to the bis(indolyl)carbonyl derivative instead of the C-3 alkenylation product under the same set of reaction conditions. Deep eutectic mixtures are cost-effective
Indole 3-alkylation/vinylation under catalysis of the guanidinium ionic liquids
作者:Kurosh Rad-Moghadam、Masoumeh Sharifi-Kiasaraie
DOI:10.1016/j.tet.2009.08.073
日期:2009.10
Two ionic liquids, N,N,N,N-tetramethylguanidinium trifluoroacetate (TMGT) and the unprecedented N,N,N,N-tetramethylguanidinium triflate (TMCTf), were used as catalyst solvents in condensations between indoles and arylaldehydes or 1,3-diketones providing a simple and efficient method for synthesis of bis(3-indolyl)methanes or casually 3-alkenylindoles due to stereoelectronic concerns of reactants. The ionic liquids are easily separated and reused for several times. (c) 2009 Elsevier Ltd. All rights reserved.