2026-10-30 九州大学
Pd/PPS触媒を用いたα,β-不飽和ケトンの化学選択的水素化による飽和ケトンの合成（左）と、水素化反応後に回収した触媒の発火試験（右）。Pd/Cでは発火が観察された一方、Pd/PPSでは発火は観察されなかった。
＜関連情報＞
- https://www.kyushu-u.ac.jp/ja/researches/view/1615
- https://pubs.rsc.org/cy/article-abstract/doi/10.1039/d6cy00847j/1375084/A-safer-hydrogenation-strategy-using-poly-p
ポリ( p-フェニレンスルフィド)担持Pd触媒を用いたα,β-不飽和カルボニル化合物の化学選択的還元のための より安全な水素化戦略 A safer hydrogenation strategy using poly(p-phenylene sulfide)-supported Pd catalysts for the chemoselective reduction of α,β-unsaturated carbonyl compounds
Akina Yoshizawa; Yoshiki Osumi; Yuxin Zheng; Siting Shen; Haruno Murayama; Akihiro Nakayama; Eiji Yamamoto; Taku Ibaraki; Mai Ikeda; Takashi Furusawa; Noriyuki Iwadate; Makoto Tokunaga
Catalysis Science & Technology Published: 28 October 2026
DOI:https://doi.org/10.1039/d6cy00847j
Abstract
A palladium catalyst supported on porous poly(p-phenylene sulfide) (Pd(0)/PPS) was developed for the chemoselective hydrogenation of α,β-unsaturated carbonyl compounds. Uniformly dispersed Pd nanoparticles (2.86 ± 0.76 nm) on the PPS support selectively hydrogenated C═C bonds to afford the corresponding saturated carbonyl compounds in good to excellent yields without the use of soluble catalyst poisons. In contrast to conventional Pd/C, Pd(0)/PPS effectively suppressed over-hydrogenation of the carbonyl group and maintained high selectivity under low catalyst loading (maximum turnover number (TON) = 960, maximum turnover frequency (TOF) = 37 h−1) and even under atmospheric hydrogen pressure. The catalyst exhibited broad substrate scope, including α,β-unsaturated ketones and cinnamic acid derivatives. Importantly, Pd(0)/PPS showed a markedly higher ignition temperature (510 °C) than commercial Pd/C (<200 °C) and exhibited no spontaneous ignition after hydrogenation. These results demonstrate that PPS is an effective support for achieving both chemoselective hydrogenation and enhanced catalyst safety.
