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756 results on '"Wang, Li-An"'

2. ChemInform Abstract: DBU and Copper(I) Mediated Carboxylation of Terminal Alkynes Using Supercritical CO2as a Reactant and Solvent

Author

Fa-Wang Li, Ning Zhu, Hailong Hong, Ya-Qi Wang, Quanling Suo, and Limin Han

Subjects
Solvent, chemistry, Carboxylation, Terminal (electronics), chemistry.chemical_element, Organic chemistry, General Medicine, Copper, Supercritical fluid
Abstract

Optimized conditions are developed for the DBU mediated carboxylation of terminal alkynes with supercritical CO2 to form the corresponding propiolic acids.

Published
2014
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19. ChemInform Abstract: The Mechanism of Potassium Promoter: Enhancing the Stability of Active Surfaces

Author

Baoshan Wu, Haijun Jiao, Yong Yang, Chun-Fang Huo, Yong-Wang Li, and Peng Gao

Subjects
Chemical engineering, Chemistry, Potassium, Promotion effect, chemistry.chemical_element, General Medicine, Alkali metal, Mechanism (sociology), Catalysis
Abstract

K2O/Fe is used as a model catalyst to characterize the alkali metal promotion effect by spin-polarized DFT calculations and experimental studies.

Published
2011
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20. ChemInform Abstract: Synthesis of LaMO3 (M: Fe, Co, Ni) Using Nitrate or Nitrite Molten Salts

Author

Junyi Zhou, Runsheng Li, Xiaoci Li, Yulin Long, Jun Yang, Yuanming Zhang, and Yong-Wang Li

Subjects
chemistry.chemical_compound, Nitrate, Transition metal, Nanocrystal, Chemistry, General Medicine, Nitrite, Nuclear chemistry, Eutectic system
Abstract

Nanocrystals of the title compounds are prepared from mixtures of La(NO3)3 and Fe(NO3)3, Co(NO3)2, or Ni(NO3)2 in NaNO2, NaNO3—KNO3 eutectic, or NaNO3—KNO3 eutectic with Na2O2 molten salts (450—800 °C, 2 h).

Published
2010
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35. ChemInform Abstract: A Novel Route for Synthesis of γ-Butyrolactone Through the Coupling of Hydrogenation and Dehydrogenation

Author

Yulei Zhu, Hongwei Xiang, Liang Bai, Gui-Sheng Wu, and Yong-Wang Li

Subjects
Coupling (electronics), chemistry.chemical_compound, Hydrogen, chemistry, chemistry.chemical_element, Maleic anhydride, Dehydrogenation, General Medicine, Combinatorial chemistry, Catalysis
Abstract

A coupling process of the hydrogenation of maleic anhydride and the dehydrogenation of 1,4-butanediol has been invented for the synthesis of γ-butyrolactone over a Cu–Zn catalyst, realizing optimal hydrogen utilization and better energy efficiency.

Published
2010
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50. Flavones from Elsholtzia stauntonii

Author

Yanbin Wang Li Li, Shangzhen Zheng, and Shuhe Kang

Subjects
Berberidaceae, chemistry.chemical_classification, chemistry.chemical_compound, biology, chemistry, Stereochemistry, General Medicine, biology.organism_classification, Flavones, Elsholtzia stauntonii, Methylenedioxy
Abstract

Structures of two new flavones isolated from Elsholtzia stauntonii Benth (Chinese name "Muxiangru", Berberidaceae) have been determined by spectroscopic methods as 5-hydroxy-7,5'-dimethoxy-6,8-dimethyl-3',4'-methylenedioxy flavone 1 and 5-hydroxy-7-methoxy-8-methyl-3',4'-methylenedioxy-5'-(3-methyl-but-2-enyl)-3',4'-methylenedioxy flavone 2, along with two known flavones, 5-hydroxy-7,4'-dimethoxy-6 -methylflavone 3, and 5-hydroxy-6,7-dimethoxyflavone 4.

Published
2004
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