A core-shell type of polymer-supported N-heterocyclic carbene (NHC) palladium catalyst was applied to Sonogashira cross-coupling reactions without copper cocatalyst under ambient atmosphere. This supported NHC-palladium complex efficiently catalyzed the copper-free Sonogashira reaction of various aryl iodides and bromides with terminal alkynes; the reaction exhibited high dependency on the temperature and the amount of base as well as its nature. In addition, this heterogeneous catalyst exhibited good reusability for the copper-free Sonogashira reaction. (c) 2007 Elsevier Ltd. All rights reserved.
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Taishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R ChinaTaishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R China
Wang, Chang-An
Li, Yan-Wei
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Taishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R ChinaTaishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R China
Li, Yan-Wei
Hou, Xian-Ming
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Taishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R ChinaTaishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R China
Hou, Xian-Ming
Han, Yin-Feng
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Taishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R ChinaTaishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R China
Han, Yin-Feng
Nie, Kun
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Taishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R ChinaTaishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R China
Nie, Kun
Zhang, Jian-Ping
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Taishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R ChinaTaishan Univ, Coll Chem & Chem Engn, Tai An 271000, Shandong, Peoples R China
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Univ Malaysia Pahang, Fac Ind Sci & Technol, Gambang 26300, Kuantan, MalaysiaUniv Malaysia Pahang, Fac Ind Sci & Technol, Gambang 26300, Kuantan, Malaysia
Sarkar, Shaheen M.
Yusoff, Mashitah Mohd
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Univ Malaysia Pahang, Fac Ind Sci & Technol, Gambang 26300, Kuantan, MalaysiaUniv Malaysia Pahang, Fac Ind Sci & Technol, Gambang 26300, Kuantan, Malaysia