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To probe the substrate scope of the reaction, more aryl iodides and bromides were chosen to react with phenylactylene using 1 mol % catalyst 3a with 2 eq K2CO3 in DMSO (2 mL) in air  (Table 3). The results showed that 3a could not only catalyze the  cross-coupling reaction of phenylacetylene with more reactive aryl iodides, but also could catalyze the reaction in good to moderate yield (55% -86%) with less reactive aryl bomides in the absence of copper co-catalysis.

To an oven-dried 50 mL of r.b.f. containing 2a , PdCl2 , K2CO3 and
NaBr  with a septum was injected into
pyridine (5 mL) under argon.
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嗜血风铃: 金币+8, 翻译EPI+1, 谢谢!!! 2014-10-12 12:39:47
为了探测反应的底物范围,用更多芳基碘化物和溴化物与苯乙炔反应,反应调节为1摩尔%的催化剂3a和2当量的K2CO3在DMSO(2mL)及空气条件下进行(表3)。结果表明,3a不仅可以催化苯乙炔与多个反应性芳基碘发生交叉偶联反应,也可以在无铜共催化存在条件下催化苯乙炔与反应性低的芳基溴化物发生反应,产率中等到良好(55%-86%)。

在带隔膜干燥烘箱中,向含有2a、PdCl2、K2CO3和溴化钠的50毫升r.b.f.在氩气条件下注入吡啶(5毫升)。
2楼2014-10-12 12:08:15
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