Synthesis of chromones via palladium-catalyzed ligand-free cyclocarbonylation of o-iodophenols with terminal acetylenes in phosphonium salt ionic liquids.
Synthesis of chromones via palladium-catalyzed ligand-free cyclocarbonylation of o-iodophenols with terminal acetylenes in phosphonium salt ionic liquids.
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DOI：
10.1021/jo902210p
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发表时间：
2010-01
期刊：
影响因子：
--
通讯作者：
Qian Yang;H. Alper
中科院分区：
文献类型：
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作者：
Qian Yang;H. Alper
在磷盐离子液体C（14）H（29）（C（6）H（13））（3）P（+）Br（-）中，邻碘苯酚与末端乙炔和CO的无配体环羰基化反应在常压下以良好的产率合成了多种色酮。作为反应介质的离子液体提高了环羰基化反应的效率。
The highly efficient and selective palladium-catalyzed ligand-free cyclocarbonylation reaction of o-iodophenols with terminal acetylenes and CO in the phosphonium salt ionic liquid, C(14)H(29)(C(6)H(13))(3)P(+)Br(-), affords diversified chromones in good to excellent yields under atmospheric CO pressure. The ionic liquid, as the reaction medium, enhances the efficiency of the cyclocarbonylation reaction.