Article
Chemistry, Physical
Diego Quintero-Ramos, Manuel Checa, Jose Luis Jorda, Maria J. Sabater
Summary: This study successfully synthesized 1-octadecanol from ethyl stearate using a nanosized Ru-supported tungstated zirconia catalyst, and revealed the activity and selectivity of the catalysts. Additionally, a synergistic effect between Ru and W species was discovered. The reaction sequence towards fatty alcohol was also elucidated.
Article
Biochemistry & Molecular Biology
Mangal S. Yadav, Manoj K. Jaiswal, Sunil Kumar, Sumit K. Singh, Faisal J. Ansari, Vinod K. Tiwari
Summary: In this study, acetimidates and commercially available trichloroacetonitrile were used to synthesize diverse glycosylated esters with high-to-excellent yields under one-pot mild reaction conditions. The method has notable features such as metal-free condition, easy handling, and broad substrate scope.
CARBOHYDRATE RESEARCH
(2022)
Article
Chemistry, Physical
Lele Huang, Xu-Feng Liu, Jinglin Zou, Xinping Duan, Zuo-Chang Chen, Zhe-Hui Zhou, Linmin Ye, Xuelian Liang, Su-Yuan Xie, Youzhu Yuan
Summary: This study presents the immobilization of atomic ruthenium (Ru) with oxidized state on defect-rich hexagonal boron nitride (d-BN) nanosheets and the important interfacial electronic effect on Ru. Experimental results demonstrate the strong electronic interaction between vacancies and atomic Ru species. Compared to defect-free hexagonal BN (h-BN), d-BN can highly stabilize the active Ru species, resulting in significantly improved catalytic activity and durability.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Organic
Uttam Dhawa, Robert Connon, Joao C. A. Oliveira, Ralf Steinbock, Lutz Ackermann
Summary: The asymmetric ruthenium-catalyzed C-H alkylations were achieved using a chiral C2-symmetric carboxylic acid, resulting in chiral tetrahydrocarbazoles and cyclohepta[b]indoles with high enantioselectivity at room temperature. Mechanistic studies revealed a fast C-H ruthenation process, with a rate- and enantio-determining proto-demetalation step. The asymmetric induction was governed by weak attractive secondary dispersion interactions, as shown in NCI analysis of the key transition states.
Article
Chemistry, Multidisciplinary
Daniel J. Tindall, Steffen Mader, Alois Kindler, Frank Rominger, A. Stephen K. Hashmi, Thomas Schaub
Summary: Sugar alcohols are important for the food industry and can be produced in large quantities with increased yield and stereoselectivity through a homogeneous system.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Feng Xu, Chao Liu, Jia-Xin Li, Cai-Zhen Zhan, Qi-Ning Xun, Wen-Shen Zhang, Wen-Fang Xing, Gang-Gang Chang
Summary: In this study, a hierarchically multifunctional single catalyst of Ru/phosphotungstic acid/hierarchically porous UiO-66 (Ru/HPW/HP-UiO-66) was fabricated and successfully applied in the one-pot synthesis of GVL. The catalyst exhibited excellent catalytic activity and stability for GVL synthesis, and also showed extraordinary performance in the hydrogenation of different unsaturated hydrocarbons in aqueous solution.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiaohai Zheng, Panjie Yu, Yaxin Liu, Yongde Ma, Yanning Cao, Zhenping Cai, Linsen Zhou, Kuan Huang, Shoutian Zheng, Lilong Jiang
Summary: This study systematically investigated the hydrogenation of methyl palmitate (MP) to hexadecanol over defect-rich Cu/m-ZrO2 catalysts. It was found that Cu/m-ZrO2-350 catalyst exhibited the best activity for MP hydrogenation due to its highest Cu dispersion, largest number of Cu0 sites, and surface oxygen vacancy concentration. The synergistic effect of Cu species and oxygen vacancies provides insights for the design of efficient catalysts for the conversion of fatty esters to fatty alcohols.
Editorial Material
Multidisciplinary Sciences
Qingli Qian, Buxing Han
Summary: This perspective discusses the progress, future opportunities, and challenges in the CO2 hydrogenation to multicarbon (C2+) products, highlighting some typical related works.
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Applied
Yoshihiro Kon, Takuya Nakashima, Shun-ya Onozawa, Kazuhiko Sato, Shu Kobayashi
Summary: The switchable synthesis of aldehydes and carboxylic acids from alcohols using Pt-catalysed H2O2 oxidation in flow reactors is reported for the first time. Optimized conditions using zero-valent Pt black diluted with SiO2 catalyst enable controlled oxidation of different types of alcohols. The catalytic activity of Pt to produce carboxylic acids increases with temperature, and the combination of temperature and flow rate serves as a trigger to selectively generate aldehydes or carboxylic acids.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Physical
Xiaoqing Gao, Shanhui Zhu, Mei Dong, Weibin Fan
Summary: By reductive pyrolysis of metal-organic framework precursor, few-layer graphene encapsulated metastable hexagonal closed-packed (hcp) Co nanoparticles were successfully fabricated, showing outstanding performance and stability in converting carboxylic acids to alcohols. Acetic acid undergoes dehydroxylation followed by hydrogenation, with a preference for vertical adsorption on hcp-Co (002) facet, contributing to a decrease in activation barrier during dehydroxylation.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Organic
Qing Dong, Qingqiu Huang, Mengke Wang, Hongyan Chen, You Zi, Weichun Huang
Summary: A novel and practical method has been discovered for the synthesis of esters from carboxylic acids, which shows high efficiency and good to excellent yields under mild conditions. This method is applicable to a series of carboxylic acids including simple molecules, drugs, and amino acids.
TETRAHEDRON LETTERS
(2022)
Article
Engineering, Environmental
Lei Hu, Keru Chen, Jiacheng Li, Ling Zhang, Yetao Jiang, Xiaoyu Wang, Zhen Wu, Aiyong He, Jiaxing Xu, Jinliang Song
Summary: In this study, a bronsted acid sites (BASs)-free zirconium-melamine coordination catalyst (Zr-MM) was synthesized and its excellent catalytic performance in the transfer hydrogenation of furfural to furfuryl alcohol was verified through a series of experiments. The catalyst achieved 100% furfural conversion and 99.4% furfuryl alcohol yield at 150 degrees C for 4 hours, and showed good catalytic stability and universality.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Peng Yang, Yaxin Sun, Kaiyue Fu, Li Zhang, Guang Yang, Jieyu Yue, Yu Ma, Jianrong Steve Zhou, Bo Tang
Summary: A nickel-catalyzed domino hydrocarboxylation-transfer hydrogenation reaction was utilized to convert terminal alkynes to alpha-chiral carboxylic acids. The reaction showed high selectivity and efficiency in preparing biologically active compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Chemical
Jingwei Zhang, Lingxin Kong, Yao Chen, Huijiang Huang, Huanhuan Zhang, Yaqi Yao, Yuxi Xu, Yan Xu, Shengping Wang, Xinbin Ma, Yujun Zhao
Summary: The Cu-Ni/SiO2 catalyst prepared by stepwise ammonia evaporation method has shown promising performance in the gas-phase hydrogenation of acetic acid, achieving a high conversion rate of 99.6% and selectivity of 90% towards ethanol. The incorporation of nickel enhances the synergistic effect between Cu-0 and Cu+, improving the stability of the copper catalyst and mitigating aggregation of copper nanoparticles during carboxylic acid conversion.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Menghui Liu, Aiqun Kong, Jinli Zhang, Yan Fu, Wei Li
Summary: The superhydrophilic Ru-PA/NF electrode, prepared with the assistance of phytic acid, shows high conversion and selectivity for electrocatalytic hydrogenation of p-Nitrophenol in alkaline media. The enhanced performance can be attributed to the higher Ru loading, more exposed sites, superior electrolyte wetting, and faster charge transfer rate of Ru-PA/NF.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
