A catalyst-free intermolecular <i>trans</i>-iodoalkylation of alkynes
作者:Jie-Jie Liu、Hong-Yan Huang、Liang Cheng、Qi Liu、Dong Wang、Li Liu
DOI:10.1039/c7ob03159a
日期:——
report the first catalyst-free and trans-selective iodoalkylation reaction of alkynes with a series of α-carbonyl compounds. This unprecedented three-component iodoalkylation reaction is enabled by using (iodoethynyl)trimethylsilane as a radical initiator and iodide source. The 1,2-difunctionalization affords alkenyl iodides, which are versatile building blocks for the construction of tri-substituted
α-Arylation of oxindoles using recyclable metal oxide ferrite nanoparticles: Comparison between the catalytic activities of nickel, cobalt and copper ferrite nanoparticles
Three different spinel metal oxide catalytic systems including NiFe2O4, CuFe2O4 and CoFe2O4 were synthesized using co-precipitation technique and their catalytic activities were compared to each other in alpha-arylation of oxindole derivatives under the optimized reaction conditions. Both nickel ferrite and copper ferrite magnetic nanoparticles show approximately the same behavior in these reactions but cobalt ferrite ones indicate slightly different properties and were not as good as the other two catalysts. These superparamagnetic catalysts allowed that et-arylation of different types of oxindoles will occur in high yields under mild conditions and at very short times. (C) 2015 Elsevier B.V. All rights reserved.
Substituted 3-phenyloxindoles
申请人:BRISTOL LAB INC
公开号:US02759935A1
公开(公告)日:1956-08-21
Palladium/Lewis Acid Co-catalyzed Cyclocarbonylation of (2-Aminoaryl)(aryl)methanols: An Access to 3-Aryl-indolin-2-ones