Coordinatively Unsaturated Ruthenium Complexes As Efficient Alkyne–Azide Cycloaddition Catalysts
作者:Marina Lamberti、George C. Fortman、Albert Poater、Julie Broggi、Alexandra M. Z. Slawin、Luigi Cavallo、Steven P. Nolan
DOI:10.1021/om2012425
日期:2012.1.23
16-electron ruthenium complexes with the general formula Cp*Ru(L)X (in which L = phosphine or N-heterocyclic carbene ligand; X = Cl or OCH2CF3) was explored in azide–alkyne cycloaddition reactions that afford the 1,2,3-triazole products. The scope of the Cp*Ru(PiPr3)Cl precatalyst was investigated for terminal alkynes leading to new 1,5-disubstituted 1,2,3-triazoles in high yields. Mechanistic studies were
在叠氮化物-炔烃环加成反应中研究了通式为Cp * Ru(L)X(其中L =膦或N-杂环卡宾配体; X = Cl或OCH 2 CF 3)的16电子钌配合物的性能。提供1,2,3-三唑产物。研究了Cp * Ru(P i Pr 3)Cl预催化剂的范围,用于末端炔烃,从而以高收率产生新的1,5-二取代的1,2,3-三唑。进行了机理研究,并揭示了许多拟议的中间体。的Cp * Ru(对我镨3)(η 2 -HCCPh)氯观察和表征通过1 H,13 C,和31P NMR在273和213的K.一个罕见的例子之间的温度下Ñ,Ñ -κ 2 -phosphazide复杂中,Cp *茹(κ 2 -我镨3 PN 3 BN)氯,得到充分表征,并且一个单晶X-获得了X射线衍射结构。DFT计算描述了与苯乙炔和/或苄基叠氮化物的催化反应性的完整图谱。