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An efficient and green preparation of 5-aminophosphonate substituted pyrimidine nucleosides under solvent-free conditions

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Chinese Chemical Letters 2010年第10期21卷 1191-1194页

作者： Xin Ying Zhang Ying Ying Qu xue sen fan School of Chemistry and Environmental Sciences Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007 China

An environmentally benign and highly efficient one-pot preparation of α-aminophosphonates under solvent-free conditions was developed. By employing this method, 5-aminophosphonate substituted pyrimidine nucleosides were synthesized in good to excellent yields starting from 5-forrnyl-2＇-deoxyuridine, aniline and dimethylphosphite.

关键词： Aminophosphonate 5-Substituted pyrimidine nucleoside Solvent-free reaction Green synthesis

Synthesis of 1,2-allenic ketones through oxidation of homopropargyl alcohols with CrO_3(cat.)/TBHP under MWI

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Chinese Chemical Letters 2011年第3期22卷 268-271页

作者： Xin Ying Zhang Ying Ying Qu Yang Yang Wang xue sen fan School of Chemistry and Environmental Science Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007 China

A CrO3 catalyzed oxidation of homopropargyl alcohols with tert-butyl hydroperoxide under microwave irradiation was found to be an efficient and rapid alternative for the preparation of 1,2-allenic *** advantages of th... 详细信息

关键词： Allenic ketones Oxidation Microwave irradiation Chromium(Ⅵ) oxide tert-Butyl hydroperoxide

Preparation of nucleoside-pyridine hybrids and pyridine attached acylureas from an unexpected uracil ring-opening and pyridine ring-forming sequence

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Chinese Chemical Letters 2009年第10期20卷 1161-1165页

作者： xue sen fan Xia Wang Xin Ying Zhang Dong Feng Ying Ying Qu School of Chemistry and Environmental Sciences Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007 China

Novel pyrimidine nucleoside-3,5-dicyanopyridine hybrids （4） or pyridine attached acylureas （5） were selectively and efficiently prepared from the reaction of 2′-deoxyuddin-5-yl-methylene malononitrile （1）, malononitrile （2） and thiophenol （3） or from an unexpected uracil ring-opening and pyddine ring-forming sequence via the reaction of 1 and 3. It is the first time such a sequence has ever been reported.

关键词： Pyrimidine nucleoside Pyridine Acylureas Ring-opening and -forming reaction

Synthesis of fused pyran and arylbis(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)methane in ionic liquid

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Chinese Chemical Letters 2009年第4期20卷 387-390页

作者： xue sen fan Ying Ying Qu Xin Ying Zhang Xia Wang Jian Ji Wang School of Chemistry and Environmental Sciences Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007 China

Promoted and mediated by an ionic liquid-[bmim][BF4], fused pyrans or arylbis（4-hydroxy-6-methyl-2-oxo-2H-pyran-3- yl）methanes were efficiently and selectively prepared from the reaction of aldehyde and 4-hydroxy-6-methyl-2-oxo-pyran with or without acetic anhydride. By using these novel procedures, pyrimidine nucleoside-fused pyran and arylbis（pyranon-3-yl）methane hybrids with potential biological activities were constructed.

关键词： Ionic liquid Fused pyran Arylbis(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)methane Pyrimidine nucleoside Green synthesis

Synthesis of cyclopentenyl and cyclohexenyl ketones via [3 + 2] and [4 + 2] annulations of 1,2-allenic ketones

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Chinese Chemical Letters 2014年第1期25卷 55-57页

作者： Liang-Yan Cui Sheng-Hai Guo Bin Li Xin-Ying Zhang xue-sen fan School of Chemistry and Chemical Engineering Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlHenan Normal University

In this paper, an efficient synthesis of cyclopentenyl ketones and cyclohexenyl ketones through tertiary phosphine catalyzed [3 ＋ 2] and [4 ＋ 2] annulations of 1,2-allenic ketones with activated alkenes has been developed. Compared with published synthetic methods on cyclopentenyl ketones and cyclohexenyl ketones, the protocols developed in this paper have the advantages such as readily available starting materials, mild reaction conditions and high efficiency.

关键词： Cyclopentenylketone Cyclohexenyl ketone 1 2-Allenic ketone Phosphine-catalyzed annulation

Multicomponent Reaction in Ionic Liquid: A Novel and Green Synthesis of 1, 4-Dihydropyridine Derivatives

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Chinese Chemical Letters 2006年第2期17卷 150-152页

作者： Xin Ying ZHANG Yan Zhen LI xue sen fan Gui Rong QU xue Yuan HU Jian Ji WANG College of Chemistry and Environmental Science Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007

An efficient and green method for the synthesis of 1, 4-dihydropyridine derivatives mediated in an ionic liquid, [bmim][BF4], through a four-component condensation process of aldehydes, 1, 3-dione, Meldrum＇s acid and... 详细信息

关键词： 1,4-Dihydropyridines ionic liquids multicomponent reaction green chemistry.

Studies on the Absorption of NO_2 by Polyethylene Glycol and the Oxidizing Properties of the Resulting Absorbent Product

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Chinese Chemical Letters 1997年第9期8卷 747-748页

作者： xue sen fan Qing Zhi ZHANG Xin Ying ZRANG sen Song ZHANG (Department of Chemistry, Henan Normal University, Xinxiang, 453002) Department of Chemistry Henan Normal University Xinxiang 453002 China

PEG (Polyethylene glycol average molecular weight 300) is used as absorbent of NO2. The absorption efficiency is found to reach up to 97%. The absorbing product, PEG NO2, can be used to cleave benzyl ethers mildly and selectively to benzaldehyde and corresponding fatty alcohols, showing that PEG is a valuable oxidizing agent of benzyl ethers. As a carrier of *** can be recovered and utilized repeatedly after the oxidation.

关键词： NO Studies on the Absorption of NO2 by Polyethylene Glycol and the Oxidizing Properties of the Resulting Absorbent Product PEG

Ionic Liquid [bmim][BF_4] as a Green Medium for Passerini Reaction

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Chinese Chemical Letters 2006年第5期17卷 578-580页

作者： Xin Ying ZHANG Yah Zhen LI xue sen fan Gui Rong QU Jian Ji WANG xue Yuan HU School of Chemical and Environmental Sciences Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang 453007

The Passerini three-component reaction of carboxylic acid, aromatic aldehyde and isocyanide was carried out smoothly and efficiently in ionic liquid [bmim]BF4. Through this reaction, a series of α-acyloxycarboxamides were obtained in high yields. Advantages of this proccedure include a green nature, high efficiency and operational simplicity

关键词： Passerini reaction acyloxycarboxamides ionic liquid green synthesis.

Copper-catalyzed tandem reaction of 2-bromobenzyl bromides with 1,3-dicarbonyl compounds leading to 4H-chromenes

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Chinese Chemical Letters 2012年第10期23卷 1129-1132页

作者： Xin Ying Zhang Liang Liang fang Nan Liu Hua Yue Wu xue sen fan School of Chemistry and Environmental Science Key Laboratory for Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China College of Chemistry&Materials Engineering Wenzhou UniversityWenzhou 325027China

A Cu（I）-catalyzed one-pot tandem reaction of 2-bromobenzyl bromides with 1,3-dicarbonyl compounds leading to 4H- chromene derivatives has been developed. This new approach toward 4H-chromenes combines several reacti... 详细信息

关键词： One-pot tandem reaction 4H-Chromenes Copper catalysis