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Homocoupling Reaction (homocoupling + reaction)
Selected AbstractsEthanol-promoted reductive homocoupling reactions of aryl halides catalyzed by palladium on carbon (Pd/C)APPLIED ORGANOMETALLIC CHEMISTRY, Issue 5 2010Linjun Shao Abstract Homocoupling reactions of aryl bromides or iodides proceeded smoothly with palladium on carbon (Pd/C) catalyst, ethanol and base in dimethyl sulfoxide (DMSO) to afford exclusively symmetric biaryls in good to excellent yields. Ethanol was first used as a reducing agent in situ to reduce the Pd2+/C species into Pd0/C active species to complete the catalytic redox cycle. It was found that ethanol can promote the Pd/C-catalyzed reductive homocoupling of aryl iodides and bromides efficiently in the presence of base. A reaction mechanism has been put forward and discussed. Copyright © 2010 John Wiley & Sons, Ltd. [source] Synthesis and characterization of a bis-(4-trifluoromethanesulfonyloxyphenyl)phenylamine monomer and its polymer for light-emitting applicationsJOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 10 2007Huseyin Zengin Abstract This study focuses on the preparation, polymerization, characterization, and optical properties of a new bis-(4-trifluoromethanesulfonyloxyphenyl)phenylamine monomer. This is the first nitrogen-containing monomer having nitrogen atoms as bridges between phenyl rings, and it was synthesized in three steps. The polymerization was carried out through the Ni(0)-catalyzed homocoupling reaction of the bis-(4-trifluoromethanesulfonyloxyphenyl)phenylamine compound. The resulting polymer, polybis(paraphenyl)phenylamine, emitted an intense blue color (where , = 415 nm) upon irradiation by ultraviolet light. The photoluminescence quantum yield was found to be 36% with a long excited-state lifetime of 3.3 ns. Electrical conductivity data for an HCl-doped film of the polymer were also examined. This novel polymer is of interest as an organic emitting material for electroluminescent devices. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 1860,1867, 2007 [source] ChemInform Abstract: Ethanol-Promoted Reductive Homocoupling Reactions of Aryl Halides Catalyzed by Palladium on Carbon (Pd/C).CHEMINFORM, Issue 38 2010Linjun Shao Abstract For the first time, ethanol is used as reducing agent in the presence of a base for the homocoupling reaction of aryl/pyridyl bromides or iodides to afford symmetric biaryls. [source] Ethanol-promoted reductive homocoupling reactions of aryl halides catalyzed by palladium on carbon (Pd/C)APPLIED ORGANOMETALLIC CHEMISTRY, Issue 5 2010Linjun Shao Abstract Homocoupling reactions of aryl bromides or iodides proceeded smoothly with palladium on carbon (Pd/C) catalyst, ethanol and base in dimethyl sulfoxide (DMSO) to afford exclusively symmetric biaryls in good to excellent yields. Ethanol was first used as a reducing agent in situ to reduce the Pd2+/C species into Pd0/C active species to complete the catalytic redox cycle. It was found that ethanol can promote the Pd/C-catalyzed reductive homocoupling of aryl iodides and bromides efficiently in the presence of base. A reaction mechanism has been put forward and discussed. Copyright © 2010 John Wiley & Sons, Ltd. [source] An alternative CuCl,piperidine-catalyzed oxidative homocoupling of terminal alkynes affording 1,3-diynes in airAPPLIED ORGANOMETALLIC CHEMISTRY, Issue 4 2010Qingwei Zheng Abstract CuCl with the use of a catalytic amount of piperidine as additive shows high catalytic activity for the oxidative homocoupling reactions of terminal alkynes in toluene at 60 °C in air to afford 1,3-diynes in high yields. Copyright © 2009 John Wiley & Sons, Ltd. [source] | ||||||||||