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Solvent- and catalyst-free synthesis of dihydropyrimidinthiones in one-pot under focused microwave irradiation conditions

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Chinese Chemical Letters 2008年第10期19卷 1183-1185页

作者： Hong Wen Zhan jin xian wang Xi Tian wang Institufe of Chemistry Department of Chemistry Northwest Normal University 967 Arming Road （E.） Lanzhou 730070 China

Fifteen dihydropyrimidinthiones have been synthesized by microwave-assisted Biginelli reactions without any solvent or catalyst. The advantages of this novel protocol include the excellent yield, operational simplicit... 详细信息

关键词： Focused microwave-assisted Catalyst- and solvent-free Synthesis Dihydropyrimidinthiones

Cobalt(I) Catalyzed Reaction of Benzaldehydes with Functionalized Benzylic Zinc Halides

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Chinese Chemical Letters 2002年第5期13卷 405-406页

作者： jin xian wang Ying FU Yu Lai HU College of Chemistry&Chemical Engineering Northwest Normal UniversityLanzhou 730070

Functionalized benzylic zinc halides reacted with benzaldehydes in the presence of Lewis acid Me3SiCl giving high yields of trans-stilbenes under the catalysis of Co(PPh3)3Cl.

关键词： Co(I) catalysis functionalized benzylic zinc halides benzaldehydes stilbenes.

A New Solvent-free Synthesis of a, a'-Dibenzylidenecycloalkanones from Acetals with Cycloalkanones under Microwave Irradiation

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Chinese Chemical Letters 2003年第4期14卷 333-334页

作者： Dan Feng HUANG jin xian wang Yu Lai HU College of Chemistry&Chemical Engineering Northwest Normal UniversityLanzhou 730070

A new rapid synthetic method is described for synthesis of a, a-dibenzylidene- cycloalkanones by the reaction of acetals and cycloalkanones without solvent using BF3稥t2O as catalyst under microwave irradiation.

关键词： Cycloalkanone acetal Lewis acid microwave irradiation.

Copper-mediated 1,4-conjugation reaction of functionalized alkylzinc iodides with derivatives of β-nitrostyrene

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Chinese Chemical Letters 2007年第9期18卷 1040-1042页

作者： Dan Feng Huang Yu Lai Hu jin xian wang College of Chemistry & Chemical Engineering Northwest Normal University Lanzhou 730070 China

Functionalized alkylzinc iodides will undergo 1,4-conjugation reaction with derivatives of β-nitrostyrene in the presence of Cu(OAc)2/LiCl to afford a polyfunctional nitro-compound in high yield.

关键词： 1,4-Conjugation reaction Cu(OAc)2/LiCl Organozinc iodide β-Nitrostyrenes

Cryogenic system design for HIAF iLinac

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Nuclear Science and Techniques 2019年第12期30卷 48-57页

作者： Xiao-Fei Niu Feng Bai xian-jin wang Jun-Hui Zhang Xiao-Hong Guo Da-Ming Sun Institute of Refrigeration and Cryogenic Zhejiang UniversityHangzhou 310027China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

A helium cryogenic system is designed by the Institute of Modern Physics,Chinese Academy of Sciences,to supply different cooling powers to the cryomodules of ion-Linac(iLinac)accelerator,which serves as the injector of the High Intensity Heavy-Ion Accelerator Facility *** iLinac is a superconducting heavy-ion accelerator approximately 100 m long and contains 13 cryomodules cooled by superfluid *** article describes the cryogenic system design of the iLinac *** requirements of the cryogenic system,such as cooling mode,refrigeration temperature,operating pressure and pressure stability,are introduced and described in *** addition,heat loads from different sources are analyzed and calculated *** equivalent cooling capacity of 10 kW at 4.5 K was determined for the cryogenic system according to the total heat ***,a system process design was conducted and analyzed in ***,the system layout and the main equipment are presented.

关键词： Ion-Linac(iLinac)accelerator Superfluid liquid helium Cryogenic system Cryomodule

Solvent free synthesis of trifluoromethyl tertiary alcohols by cross Aldol reaction

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Chinese Chemical Letters 2015年第8期26卷 1046-1049页

作者： Rui Tao Xue-Jiao Yin Ke-Hu wang Yu-Zhuo Niu Ya-Lin wang Dan-Feng Huang Ying-Peng Su jin-xian wang Yu-Lai Hu Ying Fu Zheng-Yin Du College of Chemistry and Chemical Engineering Northwest Normal University

Exceedingly fast preparation of trifluoromethyl tertiary alcohols has been accomplished from methyl ketones and trifluoromethyl ketones under solvent free conditions by cross Aldol reaction. The reaction was achieved in the presence of common inorganic base by grinding method at ambient temperature to give b-trifluoromethyl-b-hydroxyl ketones in high yields（up to 95%）.

关键词： alcohols tertiary ambient hydroxyl inorganic smoothly accomplished silica heterocyclic reagent

SOLID-LIQUID PHASE TRANSFER AND COBALT OR PALLADIUM COMPLEX CATALYZED SYNTHESIS OF ANHYDRIDES FROM ACYL CHLORIDES

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Chinese Chemical Letters 1991年第4期2卷 339-342页

作者： jin xian wang(Chin Hsien wang) Yu Lai HU Wen Feng CUI Institute of Chemistry,Department of Chemistry,Northwest Normal University,Lanzhou 730070

Acyl chloride can efficiently be converted into anhydride under solid liquid phase transfer catalysis by using bis(triphenylphosphine)cobalt dichloride or bis(triphenylphospine)palladium dichloride as the catalyst.

关键词： In wang SOLID-LIQUID PHASE TRANSFER AND COBALT OR PALLADIUM COMPLEX CATALYZED SYNTHESIS OF ANHYDRIDES FROM ACYL CHLORIDES

STUDIES ON THE REACTION OF SULFUR,SELENIUM AND TELLURIUM WITH SODIUM HYDROXIDE UNDER PHASE TRANSFER CATALYSIS(Ⅱ).A CONVENIENT METHOD FOR THE SYNTHESIS OF BI(ACYL)DISULFIDES

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Chinese Chemical Letters 1990年第3期1卷 193-196页

作者： jin-xian wang(Chin-Hsien wang) Wenfeng CUI Yulai HU Kai ZHAO Institute of Chemistry,Department of Chemistry,Northwest Normal University,Lanzhou,730070

A simple and general method for the synthesis of bi(acyl)disulfides is *** is allowed to react with sodium hydroxide to give sodium disulfide at 65℃ under PTC,which can react with acyl halides to afford bi(acyl)disul... 详细信息

关键词： In wang ACYL)DISULFIDES STUDIES ON THE REACTION OF SULFUR,SELENIUM AND TELLURIUM WITH SODIUM HYDROXIDE UNDER PHASE TRANSFER CATALYSIS A CONVENIENT METHOD FOR THE SYNTHESIS OF BI PEG OC Ph

Escort: a system for rapid and long-term tracking of multiple insect objects

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Insect Science 2025年第1期32卷 356-362页

作者： Chengshi Wu jin Ge Bin Han Hengjing Lan xian Zhou Zhuxi Ge Weichan Cui Xiaofeng Liu xianhui wang College of AI and Automation Hohai UniversityChangzhouJiangsu ProvinceChina State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina CAS Centre for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina

Dear Editor,Accurately tracking multiple individuals in insect groups provides crucial information for insect collective behavior,population activity and interactions with the environment(Price et al.,201l).

关键词： collective ). multiple