Palladium(II) complexes bearing<i>N</i>-alkylpiperidoimidazolin-2-ylidene derivatives: Effect of alkyl chain length of ligands on catalytic activity
作者:Sinem Çakır、Gülşah Türkmen、Hayati Türkmen
DOI:10.1002/aoc.3969
日期:2018.1
octadecyl) and their Pd–N‐heterocyclic carbene complexes with pyridine were synthesized and characterized using elemental analysis and spectroscopic methods. The effects of these ligands on catalyst activation and the performance of the complexes were studied in Suzuki–Miyaura reactions of arylboronic acid with aryl chlorides. The complex with the ligand having the longest chain length was found to be
作者:Liam T. Ball、Guy C. Lloyd-Jones、Christopher A. Russell
DOI:10.1126/science.1225709
日期:2012.9.28
Gently Coupled Linked aryl rings are found in a broad range of commercial chemical products. Currently, the most versatile synthetic route to this motif involves cross-coupling of one ring with a halide substituent to another ring with a boron or metal-based substituent. Recent research has focused on eliminating the need for one or both of these activating substituents, but for the most part, the
Gold-Catalyzed C–H Functionalization with Aryl Germanes
作者:Christoph Fricke、Amit Dahiya、William B. Reid、Franziska Schoenebeck
DOI:10.1021/acscatal.9b02841
日期:2019.10.4
homogenous catalysis, this report discloses the highly efficient and orthogonal reactivity of aryl germanes with arenes under gold catalysis. The method is characterized by mildness, the employment of an air- and moisture-stable gold catalyst, and robustness. Our mechanistic studies show that aryl germanes are highly reactive with Au(I) and Au(III). Our computational data suggest that the origin of this
正交 C sp 2 –C sp 2偶联方案到无所不在的 Pd 催化类的发展将为密集功能化联芳基序的构建提供额外的模块化维度。在这种背景下,迫切需要鉴定用于选择性转化的有效官能团。尽管有机锗化合物通常被认为在均相催化中反应活性较低,但该报告揭示了芳基锗烷与芳烃在金催化下具有高效且正交的反应活性。该方法的特点是温和、使用空气和湿气稳定的金催化剂以及稳健性。我们的机理研究表明,芳基锗烷与 Au (I)和 Au (III)具有高度反应性。我们的计算数据表明,这种反应性的根源主要在于相对较低的键解离能,因此达到关键键激活过渡态的畸变能较低。