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Synthesis of 2,4-Diarylcyclooctenopyridines with One-pot Four-component Reactions

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Chemical Research in Chinese Universities 2009年第3期25卷 338-342页

作者： WANG Qi-fang yan chao-guo College of Chemistry ＆ Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

An efficient one-pot four-component reaction has been developed for the synthesis of 2,4-diarylcyclooctenopyridines, in moderate yields. This route is an effective modified two-step synthesis of Krohnke pyridine and involves a four-component tandem reaction of pyridinium bromide with aromatic aldehydes and cyclooctanone in a system of NHaOAc/HOAc under microwave irradiation.

关键词： Pyridine Cycloalkenopyridine Multicomponent reaction Microwave irradiation

Three-component Reaction of Aromatic Aldehyde,Malononitrile and Aliphatic Amine Leading to Different Pyridine Derivatives

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Chemical Research in Chinese Universities 2010年第6期26卷 937-941页

作者： CHEN Jiao MA Zhen yan chao-guo College of Chemistry ＆ Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

The three-component reaction of aromatic aldehyde,malononitrile and aliphatic amine in a mixed solvent of methanol and water exhibited very interesting molecular diversity and gave the derivatives of polysubstituted N-methyldihydropyridines,2-dialkylaminopyridines and 2-methoxypyridines as main products according to the structure of aliphatic amines used.

关键词： Multicomponent reaction Malononitrile Aldehyde Dihydropyridine Pyridine Aminopyridine

Synthesis of Spiro Dihydrofurans and 1,8-Dioxo-xanthenes via DABCO Catalyzed Tandem Reaction of Aldehyde with Cyclohexane-1,3-dione and Dimedone

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Chemical Research in Chinese Universities 2011年第1期27卷 49-53页

作者： CHEN Jiao SHI Jian yan chao-guo College of Chemistry ＆ Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

The 1,4-diazabicyclo[2.2.2]octane（DABCO） catalyzed reaction of cyclohexane-1,3-dione or dimedone with various aldehydes in acetonitrile resulted in the polysubstituted tetraketones, spiro dihydrofurans or 1,8-dioxo-... 详细信息

关键词： Tandem reaction Dimedone Spiro dihydrofuran Tetraketone 1,8-Dioxo-xanthene

Syntheses,Crystal Structures and Complexing Properties of 1,3-Distal Calix[4]arene Schiff Bases

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Chemical Research in Chinese Universities 2010年第1期26卷 38-45页

作者： LI Liang GU Wei-wei yan chao-guo College of Chemistry ＆ Chemical Engineering Yangzhou University Yangzhou 225002 P R. China

Novel 1,3-distal p-tert-butylcalix[4]arene Schiff bases were efficiently synthesized in three steps. At first p-tert-hutylcalix[4]arene was reacted with N-2-hydroxyethylphthalimide catalyzed by TPP/DEAD or alkylated with ω-hatoalkylphthalimide in the system of K2CO3/KI/CH3COCH3 to give 1,3-distal diphthalimidoalkyl calixarenes, which were in turn hydrazinolyzed to give diaminoalkyl calixarenes. Then with the aid of the condensation of active calixarene amines with salicylaldehyde, 2-hydroxy-l-naphthaldehyde or pyridine-2-carboxaldehyde, a series of 1,3-distal calixarene Schiff bases was prepared in satisfied yields. The single crystal structures and complexing properties of these Schiff bases for transition metal ions were studied.

关键词： Calixarene Schiffbase Crystal structure Metal complex UV spectroscopy

Synthesis of Polysubstituted 1,4-Dihydropyridines via Four-component Reactions of Arylamine,Acetylenedicarboxylate, Aromatic Aldehyde and Ethyl Acetoacetate

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Chemical Research in Chinese Universities 2012年第4期28卷 652-655页

作者： WU Ping XIA Er-yan SUN Jing yan chao-guo Department of Biochemical Engineering Yangzhou Polytechnic UniversityYangzhou 225000P.R.China College of Chemistry&Chemical Engineering Yangzhou UniversityYangzhou 225002P..R.China

An efficient synthetic protocol for the 1,4-diaryl-1,4-dihydropyridines was developed via the domino four-component reaction of arylamine,acetylenedicarboxylate,aromatic aldehyde and ethyl *** reaction mechanism invol... 详细信息

关键词： 1 4-Dihydropyridine β-Enamino ester Domino reaction Four-component reaction

Diastereoselective Synthesis of 1,10-Dihydropyrrolo [ 1,2-a] [1,10]phenanthroline Derivatives via 1,3-Dipolar Cycloaddition Reaction

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Chemical Research in Chinese Universities 2013年第6期29卷 1089-1093页

作者： LIU Zhen-ming FANG Jun yan chao-guo Analysis and Test Center Yangzhou University Yangzhou 225002 P.R.China College of Chemistry & Chemical Engineering Yangzhou University Yangzhou 225002 P.R.China

The functionalized 1,10-dihydropyrrolo[1,2-a][1,10]phenanthroline derivatives were synthesized in good yields and with high diastereoselectivity by 1,3-dipolar cycloaddition reactions of N-phenacylphenanthrolinium bromides or N-ethoxycarbonylmethylene phenanthrolinium bromide with various nitrostyrenes in acetonitrile at room temperature in the presence of triethvlamine,

关键词： Pyridinium ylide Phenanthroline Pyrrolo[1,2-a]phenanthroline 1,3-Dipolar cycloaddition Diastereoselectivity

Efficient Synthesis of Complex Bridged 1,3-Oxazabicycles via Reactions of N-Alkyl-1,10-phenanthrolinium Halides with Cyclic 1,3-Diketones

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Chemical Research in Chinese Universities 2012年第5期28卷 847-850页

作者： WU Ping HUI Li GAO Xing yan chao-guo Department of Biochemical Engineering Yangzhou Polytechnic UniversityYangzhou 225000P.R.China College of Chemistry&Chemical Engineering Yangzhou UniversityYangzhou 225002P.R.China

Complex bridged 1,3-oxazabicycles and 1,4-disubstituted 1,10-phenanthroline derivatives were efficiently prepared by the reactions of N-methyl or N-benzylphenanthrolinium halides with cyclic 1,3-dicarbonyl compounds i... 详细信息

关键词： Phenanthroline Heterocycle Oxazabicycle Pyridinium salt Tandem reaction

Synthesis, Structure and Electrochemistry of Macrocyclic 1,1'-Bis(1,3-phenyleneoxyacetylpyrazoyl)ferrocene

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Chinese Journal of Structural Chemistry 2007年第5期26卷 505-510页

作者： ZHU Mei-Jun SONG Xiao-Kai SUN Jing yan chao-guo Department of Civil Engineering Jianghai Polytechnic College Yangzhou 225101 China College of Chemistry ＆ ChemiealEngineering Yangzhou University Yangzhou 225002 China

1,1＇-Diacetoacetylferrocene 1 reacted with phenylene-1,3-dioxyactyl hydrazine 2 in absolute ethanol to give the macrocyclic ferrocenyl dipyrazole compound in moderate yield. Determined by X-ray structure analysis, it crystallizes in monoclinic system, space group P21/c with a = 13.7509（4）, b = 8.1277（2）, c = 21.7472（6） A, β = 103.1030（10）°, V = 2367.25（11） A^3, Z = 4, Dc = 1.505 g/cm^3, R = 0.0353 and wR = 0.0811. The electrochemical studies reveal that redox of Fe^＋/Fe in ferrocene is a reversible one-electron process.

关键词： ferrocene acetylacetone pyrazole cyclic voltammetry

Efficient Synthesis of Dicycloalkenopyridines:One-pot Multicomponent Condensation of Aldehydes with Cyclic Ketones

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Chemical Research in Chinese Universities 2009年第5期25卷 657-661页

作者： CAI Xi-mei WANG Qi-fang yan chao-guo College of Chemistry ＆ Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

Under microwave irradiation, the one-pot multicomponent condensation reaction of three moles of aromatic aldehydes with two moles of cyclic ketones having free a,a＇-methylene positions such as cyclopentanone or cyclohexanone in the presence of ammonium acetate and acetic acid afforded dicycloalkenopyridines with two a-arylidene groups in high yields. Under the similar reaction condition, the reaction of aromatic aldehydes with 1-tetralone having only one a-methylene position alternatively resulted in 10-aryl-2,3：5,6-dibenzoacridines.

关键词： Pyridine Acridine Microwave irradiation Aromatic aldehyde Cyclic ketone Aldol condensation