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Wacker Oxidation of Terminal Alkenes Over ZrO 2 ‐Supported Pd Nanoparticles Under Acid‐ and Cocatalyst‐Free Conditions
Author(s) -
Zhang Zhenzhong,
Kumamoto Yuhya,
Hashiguchi Taishin,
Mamba Tetsuya,
Murayama Haruno,
Yamamoto Eiji,
Ishida Tamao,
Honma Tetsuo,
Tokunaga Makoto
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201701016
Subject(s) - catalysis , chemistry , nanoparticle , wacker process , heterogeneous catalysis , palladium , chemical engineering , photochemistry , organic chemistry , nanotechnology , materials science , engineering
Highly efficient Wacker oxidation of aromatic or aliphatic terminal alkenes into methyl ketones and benzofurans is developed by using reusable Pd 0 nanoparticles (NPs) supported on ZrO 2 under acid‐ and cocatalyst‐free conditions. Molecular oxygen or air can be utilized as the terminal oxidant, which results in the formation of H 2 O as the only theoretical byproduct. The activation of the Pd NPs by O 2 plays an important role in promoting this reaction. Interestingly, PdO supported on ZrO 2 showed no activity. Additionally, the Pd particle size significantly affects the catalytic activity, with an apparent optimal diameter of 4–12 nm. In addition to the heterogeneous catalyst forms, the Pd NPs can be generated from a Pd 0 complex during the reaction, and these particles are even recyclable.