Reactivity of C-H bonds of polychlorobenzenes for palladium-catalysed direct arylations with aryl bromides

Liqin Zhao; Tao Yan; Christian Bruneau

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Reactivity of C-H bonds of polychlorobenzenes for palladium-catalysed direct arylations with aryl bromides

机译：聚氯苯烯的C-H键对钯催化的直接芳基与芳基溴化物的反应性

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摘要

The reactivity of polychlorobenzenes vs. polyfluorobenzenes for palladium-catalysed direct arylation was studied. The PdCl(C3H5)(dppb)/KOAc system was found to promote the direct arylation of some polychlorobenzenes with aryl bromides. However, the reactivity of polychlorobenzenes was found to be lower than that of polyfluorobenzenes. The best yields were obtained from the coupling of 1,2,4,5-tetrachlorobenzene or 1,3,5-trichlorobenzene with electron-deficient aryl bromides. The C3 arylation of 2,5-dichlorothiophene was also found to proceed nicely.

机译：研究了多氯苯甲苯与多氟苯烯对钯催化的直接芳基的反应性。发现PDCL（C3H5）（DPPB）/KOAC系统可促进某些多氯苯烯与芳基溴化物的直接芳基化。然而，发现聚氯苯的反应性低于多氟苄烯的反应性。从1,2,4,5-四氯苯或1,3,5-三氯苯与电子缺陷芳基芳基溴化物的偶联中获得最佳收益率。还发现2,5-二氯噻吩的C3芳基化也很好地进行。

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来源
《Catalysis science & technology》 |2014年第2期|352-360|共9页
作者
Liqin Zhao; Tao Yan; Christian Bruneau;
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作者单位

Institut Sciences Chimiques de Renncs, UMR 6226 CNRS-Universite de Rennes "Organometalliques Materiaux et Catalyse", Campus de Beaulieu, 35042 Rennes, France.;

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正文语种英语
中图分类汉语教学;
关键词
arylation; hydrogen bonds; reactivityPOLYCHLOROBENZENEAryl bromides;

机译：芳基化;氢键;反应性丙烯酰苯基溴化物;

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Reactivity of C-H bonds of polychlorobenzenes for palladium-catalysed direct arylations with aryl bromides

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