Dehydration of Amides to Nitriles over Heterogeneous Silica-Supported Molybdenum Oxide Catalyst

被引：6

作者：

Nagasaki, Yo-hei ^{[1
]}

Tamura, Masazumi ^{[2
]}

Yabushita, Mizuho ^{[1
]}

Nakagawa, Yoshinao ^{[1
]}

Tomishige, Keiichi ^{[1
]}

机构：

[1] Tohoku Univ, Dept Appl Chem, Grad Sch Engn, Aoba Ku, 6-6-07 Aoba, Sendai, Miyagi 9808579, Japan

[2] Osaka City Univ, Res Ctr Artificial Photosynth, Sumiyoshi Ku, 3-3-138 Sugimoto, Osaka, Osaka 5588585, Japan

来源：

CHEMCATCHEM | 2022年 / 14卷 / 09期

关键词：

Dehydration; Molybdenum oxide; Amides; Nitriles; Heterogeneous catalysis; DIMETHYL CARBONATE SYNTHESIS; CONVERTING PRIMARY AMIDES; CEO2; CATALYST; ACTIVE-SITES; CO2; AMMOXIDATION; CONVERSION; OXIDATION; METHANOL; CONVENIENT;

D O I：

10.1002/cctc.202101846

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Silica-supported molybdenum oxide (MoOx/SiO2) with 4.8 wt% Mo (0.5 mmol g(-1)) was an effective and reusable heterogeneous catalyst for dehydration of 2-furamide to 2-furonitrile (96 % yield). The catalyst was applicable to the dehydration of various amides including heteroaromatic, aromatic and alkyl amides, providing the corresponding nitriles in high yields (87-97 %). Based on the results of catalyst characterizations (XRD, TEM, UV-vis, Raman) and activity tests, MoOx species are highly dispersed over SiO2, and heptamolybdate anion ([Mo7O24](6-)) and isolated dioxo ((O=)(2)MoO2) were mainly formed on the SiO2 support of the optimal MoOx/SiO2 catalyst. The strong Bronsted acid sites (Mo-OH-Si site) can be formed from the MoOx species and the adjacent silanol group, and the acid-base pair site (Mo(=O)-OH-Si site) of the strong Bronsted acid site (Mo-OH-Si site) and base site (Mo=O) over MoOx/SiO2 catalyst could be the main active site for the dehydration of amides.

引用

页数：8

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