检索结果-南通市图书馆

An efficient electrocatalytic system composed of nickel oxide and nitroxyl radical for the oxidation of bio-platform molecules to dicarboxylic acids

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第5期80卷 58-67,I0003页

作者： Kai Zhang Zixiang Zhan Minzhi Zhu Haiwei Lai Xiangyang He weiping deng Qinghong Zhang Ye Wang State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsInnovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

Selective oxidation of biomass and its derivatives to dicarboxylic acids represents a promising route for biomass valorization.However,the co-presence of multiple functional groups in biomass molecules makes the selective oxidation of particular functional a challenging task.Here,we demonstrate an efficient electrocatalytic system consisting of nickel oxide(NiO)and a nitroxyl radical,i.e.,2,2,6,6-tetrame thylpiperidine-1-oxyl(TEMPO)or 4-acetamido-TEMPO(ACT),for the selective oxidation of key bioplatform molecules including glucose,xylose and 5-hydroxymethylfurfural(HMF)into corresponding dicarboxylic acids,i.e.,glucaric acid,xylaric acid,and 2,5-furandicarboxylic acid(FDCA).NiO is clarified as the active catalyst for the oxidation of aldehyde in bio-platform molecules to carboxylic acid,while TEMPO or ACT is responsible for the oxidation of primary alcohol to aldehyde.The combination of NiO and TEMPO or ACT significantly accelerated the tandem oxidation of aldehyde and hydroxyl groups in glucose,xylose and HMF,thus achieving excellent yields(83%-99%)of dicarboxylic acids.Moreover,the combination catalyst enables the selective oxidation of glucose and xylose with high concentrations(e.g.,20 wt%),which offers a promising strategy for biomass valorization.

关键词： Biomass Electrocatalysis Nio Nitroxyl radical Dicarboxylic acid

Catalytic transformation of cellulose and its derived carbohydrates into chemicals involving C–C bond cleavage

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2015年第5期24卷 595-607页

作者： weiping deng Qinghong Zhang Ye Wang State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University

The catalytic transformation of cellulose, the major component of abundant and renewable lignocellulosic biomass, into building-block chemicals is a key to establishing sustainable chemical processes. Cellulose is a polymer of glucose and a lot research effort has been devoted to the conversion of cellulose to six-carbon platform compounds such as glucose and glucose derivatives through C-O bond activation. There also ex- ist considerable studies on the catalytic cleavage of C-C bonds in biomass for the production of high-value chemicals, in particular polyols and organic acids such as ethylene glycol and lactic acid. This review article highlights recent advances in the development of new catalytic systems and new strategies for the selective cleavage of C-C bonds in cellulose and its derived carbohydrates under inert, reductive and oxidative atmospheres to produce Q -Cs polyols and organic acids. The key factors that influence the catalytic performance will be clarified to provide insights for the design of more efficient catalysts for the transformation of cellulose with precise cleavage of C-C bonds to high-value chemicals. The reaction mechanisms will also be discussed to understand deeply how the selective cleavage of C-C bonds can be achieved in biomass.

关键词： Biomass Cellulose C-C bond activation Polyols Organic acids

Fc-PIP Catalyzed Asymmetric Synthesis of cis-2,3-Dihydrobenzofurans

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2014年第8期32卷 694-698页

作者： Shanshan Jiang Bin Hu Xingxin Yu weiping deng Shanghai Key Laboratory of New Drug Design School of PharmacyEast China University of Science and TechnologyShanghai 200237China

A highly enantioselective intramolecular Michael addition-Lactonization domino reaction of a range of enon acids catalyzed by nuleophilic organocatalyst(Fc-PIP)was developed,furnishing cis-2,3-dihydrobenzofuran deriva... 详细信息

关键词： Michael addition-Lactonization dihydrobenzofuran Fc-PIP

Catalytic conversion of cellulose-based biomass and glycerol to lactic acid

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2019年第5期28卷 138-151页

作者： Shi Li weiping deng Yanyun Li Qinghong Zhang Ye Wang State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University

Catalytic transformation of cellulose into value-added chemicals is of great importance for utilization of renewable and abundant biomass. Due to the high oxygen content, cellulose serves as an ideal candidate for the production of oxygenates, in particular lactic acid which is a versatile building block in chemical industry. The efficient conversion of cellulose to lactic acid generally requires selective activation of specific C-O and C-C bonds, and therefore multifunctional catalysts that combine several key reactions including hydrolysis, isomerization and retro-aldol fragmentation are highly desirable. This review article highlights the recently developed catalytic systems and catalysts for the selective transformation of cellulose and cellulose-derived carbohydrates into lactic acid, lactates and/or its esters. Emphases will be put on the reaction mechanism and key factors that exert effects on the catalytic performances. In addition, the catalytic transformation of glycerol, a C3 compound over-supplied from biodiesel industry, will also be surveyed. Recent advances in the development of new catalysts or strategies are analyzed and discussed to gain insight into the transformation of C3 compound to lactic acid.

关键词： Cellulose Glycerol Lactic acid Multifunctional catalysis

Asymmetric synthesis of pyrrolo[1,2-a]indoles via organocatalytic[3+2]annulation of substituted 2-vinylindoles with azlactones

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第3期31卷 721-724页

作者： Wulin Yang Hao Wang Zirong Pan Zhong Li weiping deng Shanghai Key Laboratory of Chemical Biology School of PharmacyEast China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of New Drug Design School of PharmacyEast China University of Science and TechnologyShanghai 200237China Shanghai Collaborative Innovation Center for Biomanufacturing Technology Shanghai 200237China

The chiral phosphoric acid catalyzed asymmetric[3+2]annulation of substituted 2-vinylindoles with azlactones has been established.This reaction represented a practical approach for the synthesis of structurally diverse pyrrolo[1,2-a]indoles with two vicinal stereocenters including one tetrasubstituted stereocenter in good yields and good stereoselectivities under mild conditions.

关键词： [3+2]Annulation Azlactones 2-Vinylindoles Asymmetric organocatalysis Pyrrolo[1,2-a]indoles Chiral phosphoric acid

Diastereoselective synthesis of functionalized tetrahydro-γ-carbolines via a[3+3] cycloaddition of 2,2’-diester aziridines with β-(indol-2-yl)-α,β-unsaturated ketones

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第5期31卷 1293-1296页

作者： Xuejie Zou Yangzi Liu Shaojing Shang Wulin Yang weiping deng Shanghai Key Laboratory of New Drug Design and School of Pharmacy East China University of Science and TechnologyShanghai 200237China

A Sc(OTf)3-catalyzed[3+3]cycloaddition of 2,2’-diester aziridines withβ-(indol-2-yl)-α,β-unsaturated ketones was developed,affording polysubstituted tetrahydro-y-carbolines in single diastereoisomers in good to ex... 详细信息

关键词： Aziridine Tetrahydro-γ-carboline [3+3]cycloaddition Sc(OTf)3 Diastereoselectivity

Organocatalytic asymmetric [3+3] annulation of isatin N,N’-cyclic azomethine imines with enals:Efficient approach to functionalized spiro N-heterocyclic oxindoles

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第2期32卷 672-675页

作者： Boqi Gu Shuxiao Wu Hui Xu Wulin Yang Zhixiang Liu weiping deng College of Pharmaceutical Sciences Zhejiang Chinese Medical UniversityHangzhou 310053China Shanghai Key Laboratory of New Drug Design School of Pharmacy.East China University of Science and TechnologyShanghai 200237China

An unprecedented chiral secondary amine-catalyzed [3+3] annulation of isatin N,N’-cyclic azomethine imines with α,β-unsaturated aldehydes was developed.This strategy allowed the construction of structurally novel spiro N-heterocyclic oxindole derivatives in good yields(up to 91%) and good to excellent enantioselectivities(up to>99% ee),albeit with modest diastereoselectivities(up to 3.1:1 dr).

关键词： Chiral secondary amine [3+3]Annulation Azomethine imines Spiro N-heterocyclic oxindole Asymmetric synthesis

DMAP-Catalyzed [4＋2] Cycloaddition of α,β-Unsaturated Carboxylic Acids with Ketones for Synthesis of ,β-Unsaturated δ-Lactones （pages 397–400）

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2017年第4期35卷 397-400页

作者： Jinghai Jin Qinchang Xu weiping deng Shanghai Key Laboratory of New Drug Design School of Pharmacy East China University of Science and Technology Shanghai 200237 China

催化 DMAP [4+2 ] cycloaddition，有酉同类的不饱和的羧基的酸在好收益(多达 80%) 的供应、不饱和的内酯被描述，它是遥远的 -C(sp3)-H 激活的第一个例子，不饱和的羧基的酸由 DMAP 便于，基于 pyridine 的催化剂。版权？2017 约翰·... 详细信息

催化 DMAP [4+2 ] cycloaddition，有酉同类的不饱和的羧基的酸在好收益(多达 80%) 的供应、不饱和的内酯被描述，它是遥远的 -C(sp3)-H 激活的第一个例子，不饱和的羧基的酸由 DMAP 便于，基于 pyridine 的催化剂。版权？2017 约翰·威利与儿子，有限公司。

关键词：不饱和羧酸环加成反应 DMAP 催化剂 δ-内酯合成酮吡啶基

Catalytic conversion of lignocellulosic biomass into chemicals and fuels

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第1期8卷 10-114页

作者： weiping deng Yunchao Feng Jie Fu Haiwei Guo Yong Guo Buxing Han Zhicheng Jiang Lingzhao Kong Changzhi Li Haichao Liu Phuc T.T.Nguyen Puning Ren Feng Wang Shuai Wang Yanqin Wang Ye Wang Sie Shing Wong Kai Yan Ning Yan Xiaofei Yang Yuanbao Zhang Zhanrong Zhang Xianhai Zeng Hui Zhou State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsNational Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Estersand College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Fujian Engineering and Research Center of Clean and High-valued Technologies for Biomass Xiamen Key Laboratory of High-valued Utilization of BiomassCollege of EnergyXiamen University361102China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China Institute of Zhejiang University-Quzhou 78 Jiuhua Boulevard NorthQuzhou324000China School of Energy and Environmental Engineering Hebei University of TechnologyTianjin300401China Shanghai Key Laboratory of Functional Materials Chemistry Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Biomass Science and Engineering Sichuan UniversityChengdu610065China CAS Key Laboratory of Low-carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China Department of Chemical and Biomolecular Engineering National University of Singapore4 Engineering Drive 4Singapore117585Singapore Sta

In the search of alternative resources to make commodity chemicals and transportation fuels for a low carbon future,lignocellulosic biomass with over 180-billion-ton annual production rate has been identified as a promising feedstock.This review focuses on the state-of-the-art catalytic transformation of lignocellulosic biomass into value-added chemicals and fuels.Following a brief introduction on the structure,major resources and pretreatment methods of lignocellulosic biomass,the catalytic conversion of three main components,i.e.,cellulose,hemicellulose and lignin,into various compounds are comprehensively discussed.Either in separate steps or in one-pot,cellulose and hemicellulose are hydrolyzed into sugars and upgraded into oxygen-containing chemicals such as 5-HMF,furfural,polyols,and organic acids,or even nitrogen-containing chemicals such as amino acids.On the other hand,lignin is first depolymerized into phenols,catechols,guaiacols,aldehydes and ketones,and then further transformed into hydrocarbon fuels,bioplastic precursors and bioactive compounds.The review then introduces the transformations of whole biomass via catalytic gasification,catalytic pyrolysis,as well as emerging strategies.Finally,opportunities,challenges and prospective of woody biomass valorization are highlighted.

关键词： Lignocelullose Biomass Catalytic conversion Biofuels Renewable chemicals