Golestanzadeh Mohsen, Naeimi Hossein
Departetment of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan 8731751167 Iran
Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences Isfahan 8174673461 Iran.
RSC Adv. 2019 Sep 2;9(47):27560-27573. doi: 10.1039/c9ra04511b. eCollection 2019 Aug 29.
Immobilized Pd nanoparticles on a new ligand, namely, tris(pentaethylene-pentamine)triazine supported on graphene oxide (Pd-TPEPTA-GO) was introduced as a novel and robust heterogeneous catalyst for use in C-C bond formation reaction. The Pd-TPEPTA-GO catalyst was synthesized by complexation of Pd with TPEPTA as a ligand with high N-ligation sites that were supported on graphene oxide through 3-chloropropyltrimethoxysilane. The prepared catalyst was characterized using some microscopic and spectroscopic techniques. The TPEPTA-GO substrate is a 2D heterogeneous catalyst with a high specific surface area and a large amount of N-ligation sites. The Pd-TPEPTA-GO catalyst used in the C-C bond formation reaction between aryl or heteroaryl and phenylboronic acid derivatives was applied towards the synthesis of biaryl units in high isolated yields. Notably, a series of competing experiments were performed to establish the selectivity trends of the presented method. Also, this catalyst system was reusable at least six times without a significant decrease in its catalytic activity.
一种负载在氧化石墨烯上的新型配体，即三（五亚乙基五胺）三嗪负载的钯纳米颗粒（Pd-TPEPTA-GO），被引入作为一种新型且稳定的多相催化剂，用于碳-碳键形成反应。Pd-TPEPTA-GO催化剂是通过钯与TPEPTA作为具有高氮配位位点的配体进行络合而合成的，该配体通过3-氯丙基三甲氧基硅烷负载在氧化石墨烯上。使用一些显微镜和光谱技术对制备的催化剂进行了表征。TPEPTA-GO底物是一种具有高比表面积和大量氮配位位点的二维多相催化剂。用于芳基或杂芳基与苯基硼酸衍生物之间碳-碳键形成反应的Pd-TPEPTA-GO催化剂，以高分离产率用于合成联芳基单元。值得注意的是，进行了一系列竞争实验以确定所提出方法的选择性趋势。此外，该催化剂体系可重复使用至少六次，其催化活性没有显著降低。
