Answer added in Organic Synthesis10 Is organic chemical synthesis in supercritical fluid media presently available commercially?By Bonnie tay yen ping · Malaysian Palm Oil BoardJin-Quan Wang · Chinese Academy of SciencesSeveral caseSeveral caseFollowing
Article: Experimental and theoretical studies on hydrogen bond-promoted fixation of carbon dioxide and epoxides in cyclic carbonates.[show abstract] [hide abstract]
ABSTRACT: The hydrogen bond donor-promoted fixation of CO(2) and epoxides into cyclic carbonates was investigated through experimental and density functional theory studies. A highly effective homogeneous system of 1,2-benzenediol-tetrabutyl ammonium bromide (TBAB) and heterogeneous poly-ionic liquids were developed for the fixation of CO(2) into cyclic carbonates via hydrogen bond activation, based on the understanding of the reaction mechanism and catalyst design. The work hence provides a molecular level understanding of the reaction process and forms the basis for the rational design of catalytic systems for the fixation of CO(2) into useful organic compounds.Physical Chemistry Chemical Physics 06/2012; 14(31):11021-6. · 3.57 Impact Factor
Article: Synthesis of dimethyl carbonate catalyzed by carboxylic functionalized imidazolium salt via transesterification reaction[show abstract] [hide abstract]
ABSTRACT: We investigated the dependence of cations and anions of ionic liquids (ILs) on catalytic activity for the synthesis of dimethyl carbonate (DMC) via the transesterification of ethylene carbonate (EC) with methanol (CH3OH), and demonstrated that an easily prepared carboxylic functionalized imidazolium salt exhibited higher activity, 82% yield of DMC together with 99% selectivity was obtained under the metal-free and halogen-free conditions. The reaction mechanism was also proposed according to experimental and DFT studies. In addition, in order to simplify the catalyst separation and evaluate the catalyst stability, we also covalently anchored the functionalized imidazolium salt onto a highly cross-linked polystyrene resin (PS) as a heterogeneous catalyst for DMC synthesis, and continuously performed the reaction in a fixed bed reactor for 200 h without obvious loss of activity, which would have potential applications in industry. The process thus represented an environmentally friendly pathway for the synthesis of DMC via a transesterification reaction.Catalysis Science & Technology 01/2012; 2(3):600-605.
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ABSTRACT: Chemical fixation of CO 2 into useful organic compounds has attracted much attention in both academia and industry from the standpoint of environmental protection and resource utilization. In this respect, the fixation of CO 2 with epoxides catalyzed by quaternary onium salts has been successfully achieved and commercialized, however, the details of the mechanism are still unclear. In this work, we investigated the mechanism of fixation of CO 2 with ethylene oxide catalyzed by quaternary ammonium salts by experimental and density functional theory (DFT) studies. Through the study, the detailed structural and energetic information about each step of the catalytic cycle were obtained. In addition, several factors, such as the chain length and anion, affected the reaction mechanisms, and the outcomes were also identified by experimental and DFT studies. This work provides a molecular level understanding of the reaction process and forms the basis of rational design of catalytic system.Catalysis Science & Technology 01/2012; 2:1480-1484.
Article: Polyethylene Glycol–Enhanced Chemoselective Synthesis of Organic Carbamates from Amines, CO2, and Alkyl HalidesSynthetic Communications 11/2011; 41(22):3298-3307. · 1.06 Impact Factor
Article: Synthesis of bimagnetic ionic liquid and application for selective aerobic oxidation of aromatic alcohols under mild conditions.Cheng-Xia Miao, Jin-Quan Wang, Bing Yu, Wei-Guo Cheng, Jian Sun, Sébastien Chanfreau, Liang-Nian He, Suo-Jiang Zhang[show abstract] [hide abstract]
ABSTRACT: The first bimagnetic ionic liquid based on Fe and TEMPO with cooperative functionalities not only exhibited strong paramagnetic behaviour at room temperature under an applied magnetic field of 5000 Oe but also proved to be an effective catalyst for selective aerobic oxidation of aromatic alcohols under mild and clean conditions.Chemical Communications 03/2011; 47(9):2697-9. · 6.17 Impact Factor
My research interest is in a broad sense the interface relative to organic synthesis, catalysis, and mechanism. The principal objectives of my research are the development of new catalytic methodology . One aim focuses on developing sustainable technology for utilization of CO2 , another aim consists in using early transitions metals for cross-coupling reaction through C-H and C-O bond activation. The research is also devoted to use computational chemistry to advance the above-mentioned areas