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houlu666

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Despite the efficacy of the [Pd2(dba)3]/1 catalyst system for the reactions of lithium triisopropyl 2-pyridylborates with arylbromides , more modest yields of the desired biaryls were obtained in the reactions of the corresponding aryl or heteroaryl chlorides.Employing 2 as the supporting ligand, however, provided a more active catalyst for this transformation.For example, the reaction of A with
4-chloroben-zonitrile furnished the desired productin 73% yield (Table3,entry1) .
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chemistry2228

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sltmac(金币+9, 翻译EPI+1): 欢迎常来~~~ 2011-05-16 20:03:01
在lithium triisopropyl 2-pyridylborates 和溴代芳烃的反应中由于 [Pd2(dba)3]/1的催化效果也能达到相当的产率。然而在这个过程中如果加入2做配体的话,催化剂的活性会加强。比如,A与4-chloroben-zonitrile的反应产率课高达73%。
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