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基于钯的催化剂在红藻衍生多糖载体中用于铃木交叉偶联反应的研究。

Study of Pd-based catalysts within red algae-derived polysaccharide supports in a Suzuki cross-coupling reaction.

作者信息

Wolfson Adi, Biton Shira, Levy-Ontman Oshrat

机构信息

Green Process Center, Sami Shamoon College of Engineering Bialik 56 Beer-Sheva Israel

出版信息

RSC Adv. 2018 Nov 12;8(66):37939-37948. doi: 10.1039/c8ra08408d. eCollection 2018 Nov 7.

DOI:10.1039/c8ra08408d
PMID:35558602
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9089795/
Abstract

Simple palladium complexes were heterogenized into red algae derived polysaccharide supports, and the effects of polysaccharide, catalyst and solvent types on the performances in a Suzuki cross-coupling reaction were tested. It was found that using palladium salts with sodium triphenylphosphine trisulfonate (TPPTS) as a ligand supported on ι-carrageenans and ethanol as the solvent yielded the best systems. Moreover, the conversion rates of these heterogeneous systems were higher than their homogeneous analogues, and they were easily recycled five times. SEM-EDS analysis of Pd(OAc)(TPPTS) that was immobilized on ι-carrageenan support was also performed, demonstrating that the system has a porous structure composed of Pd complex that was embedded within the ι-carrageenan. In addition, both ι-Pd(OAc)(TPPTS) and ι-Pd(OAc) systems, were composed of nanoparticles, as proven by TEM analysis.

摘要

将简单的钯配合物负载到红藻衍生的多糖载体上，并测试了多糖、催化剂和溶剂类型对铃木交叉偶联反应性能的影响。结果发现，以三苯基膦三磺酸钠（TPPTS）为配体的钯盐负载在ι-卡拉胶上，以乙醇为溶剂，得到了最佳体系。此外，这些多相体系的转化率高于其均相类似物，并且易于循环使用五次。还对固定在ι-卡拉胶载体上的Pd(OAc)(TPPTS)进行了扫描电子显微镜-能谱分析，结果表明该体系具有由嵌入ι-卡拉胶内的钯配合物组成的多孔结构。此外，透射电子显微镜分析证明，ι-Pd(OAc)(TPPTS)和ι-Pd(OAc)体系均由纳米颗粒组成。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/e986897cf74e/c8ra08408d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/8cb68b3b7092/c8ra08408d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/310697a0d46a/c8ra08408d-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/86b5ae961c49/c8ra08408d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/9a6afbd2bc5b/c8ra08408d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/e986897cf74e/c8ra08408d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/8cb68b3b7092/c8ra08408d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/310697a0d46a/c8ra08408d-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/86b5ae961c49/c8ra08408d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/9a6afbd2bc5b/c8ra08408d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f48b/9089795/e986897cf74e/c8ra08408d-f5.jpg

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