Iodine‐Modified Pd Catalysts Promote the Bifunctional Catalytic Synthesis of 2,5‐Hexanedione from C6 Furan Aldehydes

• DOI: 10.1002/cssc.202102444
• Publication Date: 2021-12-17T09:20:07Z
• Authors: Zhikun Tong; Xiang Li; Jiawei Zhu; Shixia Chen; Guiping Dai; Qiang Deng; Jun Wang; Weiran Yang; Zheling Zeng; Ji‐Jun Zou
• Keywords: Hydrogenolysis; Furan; Tetrahydrofuran; Hydroxymethyl

Currently, low intimacy between hydrogenation sites and acidic causes unsatisfactory catalytic activity selectivity for the synthesis of 2,5-hexanedione from C6 furan aldehydes (5-methylfurfural, 5-hydroxymethylfurfural). Herein, iodine(I) modification Pd-supported catalysts (such as PdI/Al2 O3 PdI/SiO2 ) was investigated to modulate sites. Unlike Pd that produced 71.4 % yield 2-hydroxymethyl-5-methyl tetrahydrofuran via an overhydrogenation route 5-methylfurfural, PdI showed a high efficiency with 93.7 by hydrogenative ring-opening route. More importantly, selective 5-hydroxymethylfurfural 50.2 hydrogenolysis subsequent reported first time. I-modified nanoparticles in-situ hydrogen spillover, which promoted C=O steps regulating adsorption configuration reactants transformation Lewis Brønsted acidity, respectively.