Heterobimetallic Pd/Mn and Pd/Co complexes as efficient and stereoselective catalysts for sequential Cu-free Sonogashira coupling–alkyne semi-hydrogenation reactions
作者:Reike Clauss、Saral Baweja、Dmitri Gelman、Evamarie Hey-Hawkins
DOI:10.1039/d1dt03757a
日期:——
stereoselective semi-hydrogenation of the alkyne intermediate using NH3·BH3 as a hydrogen source. Furthermore, different aromatic substrates have been tested to show the generality of the reaction for the synthesis of Z-alkenes, including biologically active combretastatin A-4. In addition, the homogeneous nature of the catalytically active species was demonstrated.
一系列异质双金属 Pd II /M II配合物 (M II = Mn, Co) 被合成并测试作为顺序 Sonogashira 偶联 - 炔烃半氢化反应形成Z-芳基烯烃的预催化剂。与相应的单金属对应物相比,碳金属化异质双金属 Pd II /Co II配合物CoPdL3'表现出明显的协同效应。该化合物被确定为一种有效的单分子催化剂,用于芳基溴化物与末端炔烃的一锅无铜 Sonogashira 偶联,然后使用 NH 3 ·BH 3对炔烃中间体进行化学和立体选择性半氢化作为氢源。此外,已经测试了不同的芳族底物以显示合成Z-烯烃的反应的普遍性,包括生物活性的考布他汀 A-4。此外,还证明了催化活性物质的均一性。