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Copper-free Sonogashira cross-coupling reaction catalyzed by polymer-supported N-heterocyclic carbene palladium complex
被引:90
|作者:
Kim, Jong-Ho
[1
]
Lee, Dong-Ho
[1
]
Jun, Bong-Hyun
[1
]
Lee, Yoon-Sik
[1
]
机构:
[1] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea
关键词:
polymer-supported catalyst;
N-heterocyclic carbene (NHC);
heterogeneous catalysis;
palladium (Pd);
sonogashira reaction;
copper-free;
D O I:
10.1016/j.tetlet.2007.08.015
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
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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页码:7079 / 7084
页数:6
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