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2‐Hydroxyethyl‐Substituted Pd‐PEPPSI Complexes: Synthesis, Characterization and the Catalytic Activity in the Suzuki‐Miyaura Reaction for Aryl Chlorides in Aqueous Media
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-09-17 , DOI: 10.1002/slct.201802046
Aydın Aktaş 1 , Duygu Barut Celepci 2 , Yetkin Gök 1 , Muhittin Aygün 2
Affiliation  

In recent years, PEPPSI (Pyridine‐Enhanced Precatalyst Preparation Stabilization and Initiation) complexes have attracted attention in organometallic chemistry. This study contains the synthesis of the 2‐hydroxyethyl‐substituted Pd‐PEPPSI complexes and their catalytic activity in the Suzuki‐Miyaura reaction aryl chlorides in aqueous media. The Pd‐PEPPSI complexes have been prepared from the 2‐ hydroxyethyl‐substituted N‐heterocyclic carbene (NHC) precursors, palladium chloride and 3‐chloropyridine. The Pd‐PEPPSI complexes have been characterized by using 1H NMR, 13C NMR, FTIR spectroscopy and elemental analysis techniques. The Pd‐PEPPSI complexes have been examined as catalysts in the Suzuki‐Miyaura reactions in aqueous media with arylboronic acid derivatives. Also, they have demonstrated excellent activity in these reactions. Molecular and crystal structure of one of the 2‐hydroxyethyl substituted Pd‐PEPPSI complex was determined by single crystal X‐ray diffraction method. X‐ray studies show that the molecular structure adopts a slightly distorted square‐planar geometry with the palladium (II) center.

中文翻译:

2-羟乙基取代的Pd-PEPPSI配合物:铃木宫浦反应在水性介质中的芳基氯化物的合成,表征和催化活性

近年来,PEPPSI(吡啶增强的预催化剂制备稳定和引发)配合物在有机金属化学中引起了关注。这项研究包含2-羟乙基取代的Pd-PEPPSI配合物的合成及其在Suzuki-Miyaura反应芳基氯化物在水性介质中的催化活性。Pd-PEPPSI复合物是由2-羟乙基取代的N-杂环卡宾(NHC)前体,氯化钯和3-氯吡啶制备的。Pd-PEPPSI配合物的特征是使用1 H NMR,1313 C NMR,FTIR光谱和元素分析技术。在具有芳基硼酸衍生物的水性介质中,Sduki-Miyaura反应中的Pd-PEPPSI配合物已作为催化剂进行了研究。而且,它们在这些反应中显示出优异的活性。通过单晶X射线衍射法确定了2-羟乙基取代的Pd-PEPPSI配合物之一的分子和晶体结构。X射线研究表明,分子结构采用钯(II)中心略微扭曲的方平面几何形状。
更新日期:2018-09-17
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