Sc(OTf)3: An efficient homogeneous catalyst for microwave-assisted transfer hydrogenation of ethyl levulinate to γ-valerolactone under mild conditions

被引：11

作者：

Li, Fukun ^{[1
,2
]}

Yang, Ronghe ^{[2
]}

Du, Ziting ^{[2
]}

Dai, Jinhang ^{[2
]}

Wang, Xingmin ^{[2
]}

Li, Ning ^{[2
]}

Zhang, Jie ^{[2
]}

Zhang, Xianming ^{[2
]}

Liu, Yunqi ^{[1
,3
]}

Gong, Haifeng ^{[1
]}

Yin, Hong ^{[1
]}

Cai, Zhenping ^{[4
]}

机构：

[1] Chongqing Technol & Business Univ, Engn Res Ctr Waste Oil Recovery Technol & Equipmen, Minist Educ, Chongqing 400067, Peoples R China

[2] Chongqing Technol & Business Univ, Coll Environm & Resources, Chongqing 400067, Peoples R China

[3] China Univ Petr East China, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[4] Quanzhou Normal Univ, Coll Chem Engn & Mat Sci, Quanzhou 362000, Peoples R China

来源：

MOLECULAR CATALYSIS | 2023年 / 535卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Transfer hydrogenation; Ethyl levulinate; -valerolactone; Sc(OTf)3; Microwave heating; PONNDORF-VERLEY REDUCTION; LEWIS-ACID SITES; CARBONYL-COMPOUNDS; METHYL LEVULINATE; BIOMASS; CONVERSION; ALDEHYDES; KETONES; TRANSFORMATION; CELLULOSE;

D O I：

10.1016/j.mcat.2022.112863

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：

gamma-Valerolactone (GVL) is considered as a versatile platform chemical obtained from biomass refinery. In this study, eco-friendly group III metal (Sc, Y, La) triflates were examined as homogeneous catalysts for microwave -assisted transfer hydrogenation of ethyl levulinate (EL) to GVL under mild conditions. Experimental results revealed that the selectivity of GVL has a positive relationship with the Lewis acidity of metal ion, which is related to effective charge density of the metal center (3.23, 2.81, 2.60 for Sc3+, Y3+, La3+, respectively). The stronger Lewis acidity of metal ion, the higher catalytic activity of MPV reduction. Among these catalysts, Sc (OTf)3 exhibited the best catalytic activity, achieving 98.4% EL conversion and 92.4% GVL yield at 140 degrees C in 3.0 h. Furthermore, Sc(OTf)3 showed high stability and recyclability for at least ten reaction cycles. In addition, a plausible reaction pathway and mechanism were proposed.

引用

页数：8

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