Thioether–NHC‐Ligated Pd
<sup>II</sup>
Complex for Crafting a Filtration‐Free Magnetically Retrievable Catalyst for Suzuki–Miyaura Coupling in Water
作者:Kamal Nayan Sharma、Naveen Satrawala、Raj Kumar Joshi
DOI:10.1002/ejic.201800209
日期:2018.4.30
sequence of reactions with 1,2‐dichloroethane, sodium thiophenolate, and N‐benzyl‐2‐chloroacetamide, successively. The moisture/air‐insensitive complex [Pd(L–HCl)Cl2] (1) was prepared by the reaction of L with PdCl2. The molecular structure of 1, established by X‐ray crystallography, revealed a square‐planar geometry around Pd. Complex 1 was screened for Suzuki–Miyaura coupling reactions of various
一种新的苯并咪唑鎓盐,是一种新型硫醚官能化NHC的前体,即1- [苄氨基羰基甲基] -3-(2-苯基硫烷基乙基)-1 H-苯并咪唑鎓氯化物(L),是通过将1 H-苯并咪唑与与1,2-二氯乙烷,硫酚钠和N-苄基-2-氯乙酰胺的一系列反应 通过L与PdCl 2的反应制备了对水分/空气不敏感的复合物[Pd(L -HCl)Cl 2 ](1)。通过X射线晶体学建立的1的分子结构揭示了Pd周围的正方形平面几何形状。复杂的在室温下,对各种芳基/杂芳基溴化物的Suzuki-Miyaura偶联反应(在2 h内收率高达94%)进行筛查,筛选了1种化合物。此外,通过逐步修饰策略,将络合物1固定在氨基丙基官能化的二氧化硅包覆的磁铁矿纳米颗粒[NPs,Fe 3 O 4 @SiO 2-(CH 2)3 -NH 2 ]的表面上,以开发非均相的可磁回收催化剂的Fe 3 ö 4 @SiO 2 - 1' ,在其中存在于NHC