A copper-catalyzed Friedel–Crafts propargylation/hydroamination/aromatization sequence is described. In the presence of a catalytic amount of CuI, this sequential reaction can convert ethynyl benzoxazinanones and indoles into a diverse set of 3,3′-biindoles with high efficiency and selectivity. Moreover, the synthesis of other indole–heteroaryl molecules and the catalytic asymmetric formation of axially
The photocyclization of alkynylanilines catalyzed by an aggregated PtII-based octahedral cage has been shown to mimic bio-enzyme catalysis by aggregated biological macromolecules. The aggregated supramolecular species exhibits a higher photocatalytic efficiency than dispersed metal-organic cages without aggregation.
One-pot synthesis of arylated 1-methyl-1H-indoles by Suzuki–Miyaura cross-coupling reactions of 2,3-dibromo-1-methyl-1H-indole and 2,3,6-tribromo-1-methyl-1H-indole
Arylated 1-methyl-1H-indoles were prepared by Suzuki-Miyaura cross-coupling reactions of 2,3-dibromo-1-methyl-1H-indole and 2,3,6-tribromo-1-methyl-1H-indole. The reactions proceed with very good regioselectivity in favour of position 2. (C) 2013 Elsevier Ltd. All rights reserved.
Visible-light-induced photocatalyst-free C-3 functionalization of indoles with diethyl bromomalonate
A visible-light induced green and efficient method is developed for the synthesis of α-indolyl diethyl malonates. The reaction proceeds without any photocatalysts or ligands in a green solvent in a short time. Moreover, the reaction mechanism has been clearly studied by control experiments, spectrophotometric studies and density functional theory (DFT) calculations. The results showed that the photocatalyst-free
Palladium-Catalyzed Direct C2 Arylation of<i>N</i>-Substituted Indoles with 1-Aryltriazenes
作者:Can Liu、Tao Miao、Lei Zhang、Pinhua Li、Yicheng Zhang、Lei Wang
DOI:10.1002/asia.201402274
日期:2014.9
A novel and efficient palladium‐catalyzed C2 arylation of N‐substituted indoles with 1‐aryltriazenes for the synthesis of 2‐arylindoles was developed. In the presence of BF3⋅OEt2 and palladium(II) acetate (Pd(OAc)2), N‐substituted indoles reacted with 1‐aryltriazenes in N,N‐dimethylacetamide (DMAC) to afford the corresponding aryl–indole‐type products in good to excellent yields.