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Green synthesis of liquid crystal intermediates the preparation of phenylacetylenes in ionic liquids

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  • Trans Tech Publications Ltd
Sonogashira coupling of phenylacetylenes with phenyl iodides in l-butyl-3-methyl-imidazolium bromide (BMImBr) was explored. Using CuI/Pd(PPh_3)_4 as a catalyst and Im as the base, the expected substituted acetylenes were obtained with good to excellent yields (61%-95%) under mild conditions (4h, 60℃). After the product was isolated, the left ionic liquid can been readily recovered and reused in the subsquent runs with almost the same efficiency. The reactivity of different iodoarenes with terminal alkynes was also discussed.

ionic liquidssonogashira reactionphenyl iodidesphenylacetylenes

Bao-You Liu、Hui-Long Yang、Yi-Ping Wang、Yuan-Yuan Wang、Zhi-Jie Wu、Fu-Xiang Wei

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College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

Department of General Service, Hebei University of Science and Technology, Shijiazhuang 050018, China

College of Material Materials Science & Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

2010

10.4028/www.scientific.net/KEM.428-429.46

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.428/429
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