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国家自然科学基金(20625205)

作品数:8 被引量:15H指数:3
发文基金:国家自然科学基金广东省自然科学基金国家教育部博士点基金更多>>
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8 条 记 录,以下是 1-10
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An Efficient and Practical Process for Pd/Cu Cocatalyzed Homocoupling Reaction of Terminal Alkynes Using Sodium Percarbonate as a Dual Reagent in Aqueous Media被引量:3
2007年
A new process for the Pd/Cu co-catalyzed homocoupling reaction of terminal alkynes was developed. The reaction was carried out in aqueous media with sodium percarbonate as both a clean oxidant and a base. Meanwhile, a palladium complex immobilized on a synthetic PS-PEG400-PPh2 resin was used as the catalyst, which may be recovered by simple filtration and reused for several times with high activity.
周磊詹海莺刘海灵江焕峰
关键词:HOMOCOUPLINGPALLADIUM
Reduction of Aldehydes by Fe-H_2O-CO_2 System in Supercritical Carbon Dioxide
2008年
1 Introduction Nowadays, green chemistry has received increased attention. The use of water and scCO2 as a solvent or reagent is an important field for organic reactions and green chemistry both in laboratory and industry.
HUANG Xi-zheJIANG Huan-feng
关键词:ALDEHYDESALCOHOLSREDUCTION
PdCl_2-catalyzed heterocyclotrimerization in MeOH/scCO_2:A versatile approach to dimethyl pyridine-3,5-dicarboxylate from methyl acrylate and urea
2008年
A novel and green method for the synthesis of dimethyl pyridine-3,5-dicarboxylate has been developed. It is PdCl2-catalyzed heterocyclotrimerization of methyl acrylate with urea in methanol/supercritical carbon dioxide. The target compound was obtained with a 75% isolated yield under the optimized con-ditions.
ZOU Bo,JIANG HuanFeng College of Chemistry,South China University of Technology,Guangzhou 510640,China
关键词:PDCL2DIMETHYL
Copper-Catalyzed Aerobic sp~2 C-H Functionalization for the C-N Bond Formation:Highly Efficient Syntheses of Pyrazoles and Indazoles
<正>Direct installation of nitrogen groups into hydrocarbons,1 without relying on prefunctionalization of simpl...
Xianwei LiHuanfeng,Jiang
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The heavy atom effect on photocleavage of DNA by mono-hydroxyl halogenated corroles被引量:4
2010年
DNA photocleavage properties of halogenated mono-hydroxyl corrole 1-5 were investigated.It was found that these corroles were able to photocleavage supercoiled pBR 322 DNA(SC) into nicked-circular DNA(NC).The activity of these corroles follows an order of 4>3>2≈1>5.The photosensitized singlet oxygen(Φ;) quantum yield by these corroles also follows that same order,showing the photocleavage activity is related to the heavy atom effect of halogen atoms on corroles.
Chi Kwong Chang
关键词:CORROLEDNAPHOTOCLEAVAGE
Histidine-catalyzed synthesis of cyclic carbonates in supercritical carbon dioxide被引量:3
2010年
The coupling reaction of carbon dioxide with epoxides was investigated using naturally occurring α-amino acids as the catalyst in supercritical carbon dioxide and it was found that L-histidine is the most active catalyst.In the presence of 0.8 mol% of L-histidine at 130°C under 8 MPa of CO_(2),the reaction of carbon dioxide with epoxides proceeded smoothly,affording corresponding cyclic carbonates in good to excellent yields.
QI ChaoRongJIANG HuanFeng
关键词:EPOXIDES
PS-HQ:More convenient in situ polymeric cocatalyst for the PdC1_2-catalyzed acetalization in supercritical carbon dioxide被引量:1
2007年
Polystyrene-supported hydroquinone (PS-HQ) is presented as an in situ polymeric cocatalyst to replace polystyrenesupported benzoquinone (PS-BQ) in the PdCl2-catalyzed acetalization of methyl acrylate with methanol in supercritical carbon dioxide (scCO2) under oxygen atmosphere. Due to deletion of H2O2 oxidation step, PS-HQ is more convenient and relatively inexpensive.
Zhao Yang WangHuan Feng JiangChao Rong QiYan Xia ShenShao Rong Yang
关键词:HYDROQUINONE
含Lewis酸催化位点的稀土-有机骨架材料
近年来,稀土-有机骨架材料(Lanthanide metal-organic frameworks,Ln-MOF)由于其拓扑结构的多样性和在光学、催化、化学吸附、磁性质和电子导体等方面的功能特性已经受到研究人员的广泛关注...
任颜卫江焕峰蔡博伟郑德陈俊
关键词:异相催化LEWIS酸催化
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Palladium-catalyzed Addition of alkynylbromides to Alkynes
<正>Haloalkynes represent an attractive alternative to aryl halides or boric acid because of their higher react...
李亦彪刘必富江焕峰
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钯催化邻氨基苯酚,炔溴,异氰三组分串联反应合成4-氨基苯并[b][1,4]氮氧杂卓衍生物
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刘必富江焕峰
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