☆ 4.6 Article

Synthesis of dendrimers terminated by DABCO ligands and applications of its palladium nanoparticles for catalyzing Suzuki-Miyaura and Mizoroki-Heck couplings

APPLIED ORGANOMETALLIC CHEMISTRY (2013)

期刊

APPLIED ORGANOMETALLIC CHEMISTRY

卷 27, 期 1, 页码 13-18

出版社

WILEY

DOI: 10.1002/aoc.2930

关键词

dendrimer; nanopalladium; Suzuki-Miyaura reaction; Mizoroki-Heck reaction; supported catalyst

类别

Chemistry, Applied Chemistry, Inorganic & Nuclear

资金

National Natural Science Foundation of China [21072077]
Guangdong Natural Science Foundation [10151063201000051]

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Protocol

Reagent

摘要

A new kind of silica-supported third-generation dendrimers capped by 1,4-diaza-bicyclo[2.2.2]octane (DABCO) group-stabilized palladium(0) nanoparticles, and their enhanced catalytic activity in Suzuki-Miyaura and Mizoroki-Heck reactions in excellent yield under mild conditions, was reported. The resulting silica-supported dendrimer-stabilized palladium(0) nanoparticles with a particle size of 10-20 nm were prepared in situ by treatment with PdCl2 and hydrazine in ethanol at 60 degrees C for 24 h. The catalyst as prepared was characterized by FT-IR, X-ray diffraction, thermal analysis, elementary analysis (EA), scanning electron microscopy and transmission electron microscopy. Recycling experiments showed that the catalyst could be easily recovered by simple filtration and reused for up to five cycles without losing its activity. Copyright (C) 2012 John Wiley & Sons, Ltd.

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