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Progress in the Palladium-Catalyzed Cyanation of Aryl Chlorides

机译:钯催化芳基氯化物的氰化研究进展

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The development of new palladium catalysts for the cyanation of various aryl and heteroaryl chlorides is described. The combination of amine co-catalysts with chelating phosphine ligbands, for example, 1,4-bis(diphenylphosphino)butane (dppb) or 1,5-bis(diphenylphosphino)pentane (dpppe), allows an efficient cyanatiom of chloroarenes with simple potassium cyanide. General palladium-catalyzed cyanation of nonactivated and deactivated chloroarenes is possible for the first time. Studies fo the oxidative addition of aryl halides to palladium triphenylphosphine complexes in the presence and absence of amines suggest that the co-catalyst is capable of preventing catalyst deactivation caused by the presence of excess cyanide ions in solution.
机译:描述了用于各种芳基和杂芳基氯氰化的新型钯催化剂的开发。胺助催化剂与螯合膦配体的结合,例如1,4-双(二苯基膦基)丁烷(dppb)或1,5-双(二苯基膦基)戊烷(dpppe),可以使氯芳烃与简单的钾形成有效的氰化氰化物。未活化和失活的氯芳烃的一般钯催化的氰化作用是首次出现。在存在和不存在胺的条件下,芳基卤化物向钯三苯基膦配合物的氧化加成反应的研究表明,助催化剂能够防止由于溶液中存在过量氰化物离子而引起的催化剂失活。

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