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Microwave-prompted Rapid and Efficient Synthesis of Diacyl Thiosemicarbazides and Semicarbazides in Solvent and Catalyst Free Condition

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Chinese Chemical Letters 2005年第8期16卷 1027-1030页

作者： Xi Cun WANG zheng jun quan Man Gang WANG zheng LI Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070

Eighteen 1-aroyl-4-（2-iodobenzoyl）thiosemicarbazides and corresponding semicarbazides were synthesized in excellent yield under microwave irradiation in solvent and catalyst free condition.

关键词： Microwave irradiation 1,4-diaroyl thiosemicarbazides 1,4-diaroyl semicarbazides,solvent-free synthesis.

PEG-OSO_3H as an efficient and recyclable catalyst for the synthesis of β-amino carbonyl compounds via the Mannich reaction in PEG-H_2O

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Chinese Chemical Letters 2012年第4期23卷 423-426页

作者： Xi Cun Wang Li Jia Zhang Zhang Zhang zheng jun quan Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China

Sulfuric acid-modified polyethylene glycol 6000（PEG-OSO_3H） was applied as an efficient and recyclable catalyst for the synthesis ofβ-amino carbonyl compounds via the Mannich reaction between aldehydes,aromatic ketones and aromatic amines at room temperature using PEG400-H_2O（1：1） as environment-friendly *** reactions were completed in short times and mild reaction conditions with good to excellent yields.

关键词： Mannich reaction β-Amino carbonyl compounds PEG-OSO_3H Environmentally benign

Visible light promoted polyhalomethylation of alkenes: alkylation and cyclization

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Organic Chemistry Frontiers 2022年第4期9卷 1004-1009页

作者： Tong-Lin Wang Bo-Sheng Zhang Jing-Jiang Liu Xiao-jun Liu Xi-Cun Wang zheng-jun quan Laboratory of Eco-Environment-Related Polymer Materials Ministry of EducationChina.College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhouGansu 730070People’s Republic of China

We report a visible light promoted carbochloromethylation of 2-bromomethyl acrylate and N-arylmethacrylamide,and a series of trihalomethyl substituted allylic acid esters and indolone derivatives were *** reaction used common and inexpensive chloroform and tribromomethane as tri-halomethyl reagents,iodobenzene diacetate(PIDA)as an oxidant and Eosin Y as a *** reaction conditions are mild and the substrate scope is wide.

关键词： promoted light cyclization

PEG-SO_3H as an efficient and reusable catalyst for chemoselective synthesis of 1,1-diacetates

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Chinese Chemical Letters 2013年第2期24卷 140-142页

作者： Ying-Xiao Zong jun-Ke Wang Yu-Ying Niu zheng-Liang Li zheng-En Song zheng-jun quan Xi-Cun Wang Guo-Ren Yue Yi Pan Key Laboratory of Hexi Corridor Resources Utilization of Cansu Universities College of Chemistry and Chemical EngineeringHexi University Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities College of Chemistry and Chemical Engineering Hexi University School of Chemistry and Chemical Engineering.Nanjing University Key Laboratory of Hexi Corridor Resources Utilization of Cansu Universities.College of Chemistry and Chemical Engineering.Hexi University Cansu Key Laboratory of Polymer Materials College of Chemistry and Chemical EngineeringNorthwest Normal University Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities College of Chemistry and Chemical EngineeringHexi University School of Chemistry and Chemical Engineering Nanjing University

Received 20 November 2012 Received in revised form 13 December 2012 Accepted 21 December 2012 Available online 29 January 2013

关键词： Chemoselectivityl l-DiacetatePEG-SO3HSo/vent-free

PEG-400 as an efficient reaction medium for the synthesis of 2,4,5-triaryl-1H-imidazoles and 1,2,4,5-tetraaryl-1H-imidazoles

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Chinese Chemical Letters 2009年第1期20卷 44-47页

作者： Xi Cun Wang Hai Peng Gong zheng jun quan Lei Li He Lin Ye Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 PR China

An efficient protocol for the one-pot multicomponent synthesis of various 2,4,5 -triaryl- 1H-imidazoles and 1,2,4,5 -tetraaryl- 1H- imidazoles using PEG-400 as reaction medium is described. This method has the advanta... 详细信息

关键词： 2,4,5-Triaryl-1H-imidazoles 1,2,4,5-Tetraaryl-1H-imidazoles PEG-400 Benzil

Direct amination of pyrimidin-2-yl tosylates with aqueous ammonia under metal-free and mild conditions

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Chinese Chemical Letters 2015年第6期26卷 667-671页

作者： Hai-Peng Gong Yue Zhang Yu-Xia Da Zhang Zhang zheng-jun quan Xi-Cun Wang Laboratory of Eco-Environment-Related Polymer Materials Ministry of EducationGansu Key Laboratory of Polymer MaterialsCollege of Chemistry and Chemical EngineeringNorthwest Normal University

A metal-flee synthesis of pyrimidine functionalized primary amines via direct amination of pyrimidin-2- yl tosylate with aqueous ammonia has been developed under mild conditions. The desired products pyrimidin-2-amine... 详细信息

关键词： Ammonia 2-Aminopyrimidines Pyrimidin-2-yl tosylate PEG-400

PEG-SO_3H as catalyst for the Beckmann rearrangement and dehydration of oximes

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Chinese Chemical Letters 2009年第6期20卷 651-655页

作者： Xi Cun Wang Lei Li zheng jun quan Hai Peng Gong He Lin Ye Xiao Feng Cao Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 PR China

Under mild conditions, conversion of a variety of ketoximes and aldoximes to their corresponding amides and nitriles proceeded in the presence of PEG-SO3H with high yields.

关键词： Beckmann rearrangement PEG-SO3H Dehydration of oximes

Reductive Coupling of Aryl Halides via C-H Activation of Indene

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Chinese Journal of Chemistry 2021年第6期39卷 1573-1579页

作者： Bo-Sheng Zhang Ying-Hui Yang Fan Wang Xue-Ya Gou Xi-Cun Wang Yong-Min Liang Yuke Li zheng-jun quan College of Chemistry and Chemical Engineering Gonsu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional MaterialsNorthwest Normal UniversityLanzhouGansu 730070China State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhouGansu 730000China Department of Chemistry and Centre for Scientific Modeling and Computation Chinese University of Hong KongShatinHong KongChina

This paper describes the first case of a reductive coupling reaction with indene,a non-heteroatom olefin used as a reducing *** scope of the substrate is *** homo-coupling,cross-coupling,and synthesis of 12 and 14-membered rings were *** control experiment,indene-product curve and density functional theory calculations showed that the η^(3)-palladium indene intermediate was formed by C-H activation in the presence of cesium *** speculate that the final product was obtained through a Pd(IV)intermediate or aryl ligand *** addition,we excluded the formation of palladium anion(Pd(0)^(-))intermediates.

关键词： C-C coupling Palladium Reduction Indene C-H activation

Effect of cholesterol metabolism on hepatolithiasis

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World Journal of Gastroenterology 2025年第1期31卷 157-162页

作者： Lin zheng Zi-Yu Ye jun-Ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesNo.215 Heping West RoadShijiazhuang 050000Hebei ProvinceChina

Surgical intervention is currently the primary treatment for hepatolithiasis;how-ever,some patients still experience residual stones and high recurrence rates after *** metabolism seems to play an important role in hepatoli-thiasis pathogenesis.A high cholesterol diet is one of the significant reasons for the increasing incidence of ***,regular diet and appropriate medical intervention are crucial measures to prevent hepatolithiasis and reduce recurrence rate after *** dietary cholesterol and drugs that increase cholesterol stone solubility are key therapeutic approaches in treating *** article discusses the cholesterol metabolic pathways related to the pathogenesis of hepatolithiasis,as well as food intake and targeted therapeutic drugs.

关键词： Hepatolithiasis Cholesterol metabolism High-fat diet 3-hydroxy-3-methylglutaryl-coenzyme A reductase Interlobular bile duct