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Chinese Journal of Structural Chemistry 2002年第1期21卷 67-70页

作者：迟国臣陈茹玉王宏根姚心侃 Central Laboratory Nankai UniversityTianjin300071China Institute and National Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

The title compound, C15H22N3O9P?H2O, Mr=455.36, crystallizes in orthorhombic, space group P212121, with a =9.193(2), b =14.681(3), c =15.201(3), V =2501(1)3, Z =4, Dx=1.474g/cm3, l(MoKa)=0.71073, m=0.1894mm-1, T=2991K, F(000)=960, R=0.061 and Rw=0.068 for 1899 observed reflections with I≥3s(I). The analysis results indicate that the title compound is of lyxo-configuration and the configuration at C4 is S. In the crystal state the molecule has anti conformation about glycosidic bond with the torsion angle 151.7? the sugar ring is puckered with C3-endo-C2-exo, and the conformation of the C4C5 bond is -sc.

关键词： nucleosides oxazoline conformation crystal structure

Synthesis and characterization of diblock copolymer of butadiene and 2-ethyl-2-oxazoline

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Science China Chemistry 1998年第2期41卷 194-201页

作者：徐胜清黄葆同 Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China

By mechanism transformation (anionic cationic) polymerization, diblock copolymer of butadiene and 2 ethyl 2 oxazoline (PBd b PEOx) was synthesized in two steps. The first step is the polymerization of butadiene block capped with ethylene oxide and its tosylation; the second step is the cationic ring opening polymerization of 2 ethyl 2 oxazoline. The products were characterized by various methods, such as IR, 1HNMR, DMA, TEM and SAXS. The results show that the obtained copolymers possess high molecular weight and narrow molecular weight distribution, and that the content of 1,4 structure was controllable.

关键词： 2-ethyl 2 oxazoline butadiene block copolymer mechanism transformation polymerization charac terization.

Syntheses and Configuration Inversion of Substituted oxazolines

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Chemical Research in Chinese Universities 2001年第3期17卷 271-275页

作者： YANG Shao-rong HU Quan-yuan LIU Jun YANG Hui HU Xian-ming College of Chemistry Wuhan UniversityWuhan 430072P.R.China

The present paper covers the simply and highly stereoselective syntheses of (α-S, 4S)-2-dichloromethyl-4, 5-dihydro-α-(4-nitrophenyl)-4-oxazolemethanol (4a), (α-S, 4S)-2-methyl-4, 5-dihydro-α-(4-nitrophenyl)-4-oxazolemethanol (4b), and (α-R, 4R)-2-dichloromethyl-4, 5-dihydro-α-[(4-methylsulfonyl)phenyl]-4-oxazolemethanol(4c) with good yields(80%—90%). A configuration inversion product, (1R, 2S)-2-dichloroacetamido-1-(4-nitrophenyl)-1, 3-propanediol (8), was obtained during our attempting to convert compound 4a into (4S, 5R)-2-(dichloromethyl)-4, 5-dihydro-5-(4-nitrophenyl)-4-oxazolemethanol(7).

关键词： oxazoline Heterocyclic Configuration inversion

A Convenient Synthesis of 2-oxazolines and 2-Benoxazoles with PPh3-DDQ as the Dehydrating Reagent

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Chinese Journal of Chemistry 2011年第5期29卷 925-932页

作者：徐全才李争宁陈会英 College of Environmental and Chemical Engineering Dalian University Dalian Liaoning 116622 China Liaoning Key Laboratory of Bioorganic Chemistry Dalian University Dalian Liaoning 116622 China College of Life Science Dalian Nationalities University Dalian Liaoning 116605 China

2-oxazolines and 2-benoxazoles were synthesized in high yields from acylamino alcohols and acylaminophenols, respectively, with triphenylphosphine-2,3-dichloro-5,6-dicyanobenzoquinone （PPh3-DDQ） as the dehydrating a... 详细信息

关键词： oxazoline benzoxazole synthesis dehydrative cylization 2,3-dichloro-5,6-dicyanobenzoquinone triphenylphosphine

Synthesis of 2-oxazolines from Ethyl α-Cyanocinnamate Derivatives with Acetamide and N-Bromosuccinimide

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Chemical Research in Chinese Universities 2013年第4期29卷 699-705页

作者： CHEN Zhan-guo XIA Wei WEN Hua WANG Dan LI Ya-nan HU Jun-li Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 P. R. China

An efficient method for the one-pot synthesis of 2-oxazolines from ethyl a-cyanocinnamate derivatives with acetamide and N-bromosuccinimide（NBS） in the presence of K3PO4 was developed. The reaction was performed smoothly and cleanly to give 2-oxazolines in good to excellent yields（up to 95%） in acetone at room temperature. Thirteen examples were investigated and the results indicated that a large range of a-cyanocinnamate derivatives could be suitable for this method. Based on the outcomes of experiment, a possible consecutive nucleophilic addition- cyclization pathway was proposed.

关键词： One-pot synthesis oxazoline Acetamide N-Bromosuccinimide(NBS) Regioselectivity Nucleophilic ad-dition-cyclization

Simple and Mild Syntheses of Optically Active 2-(N,N-Dialkylamino)oxazolines

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Chemical Research in Chinese Universities 2010年第3期26卷 394-397页

作者： JIA Xu-dong DUAN Hai-feng LIN Ying-jie CAO Jun-gang LIANG Da-peng LUO Xu-yang JIANG Feng GAO Han WU Mao-cheng Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

Chloroamidinium salts and a-amino alcohols derived from commercially available tetraalkyl ureas and α-amino acids, respectively, can be used for the syntheses of optically active 2-（N,N-dialkylamino）oxazolines in moderate to excellent yields without any catalyst. It is a simple and mild method for the syntheses of optically active oxazolines

关键词： Amino alcohol oxazoline Chloroamidinium salt Guanidine

Reactions of Imidates with Phenoxyacetyl Chloride

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Chemical Research in Chinese Universities 2005年第1期21卷 59-64页

作者： JIAOLei LIANGYong WUChun-zan HUANGXu XUJia-xi KeyLaboratoryofBioorganicChemistryandMolecularEngineeringofMinistryofEducation DepartmentofChemicalBiologyCollegeofChemistryandMolecularEngineeringPekingUniversityBeijing100871P.R.China

The reactions of imidates including cyclic imidates, oxazolines and dihydrooxazine with phenoxyacetyl chloride, were investigated. The results indicate that diacylamide or acylamide was generated from N-phenoxyacetylated imidates, while cyclic imidate oxazolines underwent a ring-opening reaction to yield different amides depending on the reaction conditions. Even under non-nucleophilic conditions, no β-lactam-fused oxazoline derivative was obtained.

关键词： Acyl chloride Amide Dihydrooxazine Imidate oxazoline Ring-opening

Concise synthesis of (-)-anisomycin

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Chinese Chemical Letters 2012年第6期23卷 647-649页

作者： Ji Li Yan Hua Feng Xin Bai Li Wei Han Huan Qiu Liu Guo Guang Shao Department of Anesthesiology The First Hospital of Jilin University Changchun 130021. China Department of Thoracic Surgery The First Hospital-of Jilin University Changchun 130021 China

The antibiotic （-）-anisomycin was synthesized starting from D-tyrosine using Sharpless asymmetric epoxidation as a key reaction followed by formation and hydrolysis of oxazoline set up all chiral center.

关键词： Anisomycin D-Tyrosine Sharpless asymmetric epoxidation oxazoline

Crystal Structure of Phenol,2-[4(S)-4-Dihydro-4-benzyl-2-ozazolinyl]

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Chinese Journal of Structural Chemistry 2010年第6期29卷 947-949页

作者：罗梅周仕明张家海庞文民尹浩胡克良 Hefei University of Technology Department of Chemical Engineering University of Science and Technology Department of Chemistry (Hefei) University of Science and Technology Department of Chemistry (Hefei)

The compound phenol,2-[4（S）-4,5-dihydro-4-phenyl-2-ozazolinyl（1,C15H13NO2） was synthesized with a simple,one step method free of water and *** was obtained in a moderate yield from the reaction of 2-hydroxybenzonitrile with optically active amino alcohol in chloroben-zene under dry,anaerobic *** belongs to the orthorhombic system,space group P212121 with a = 5.786（5）,b = 10.730（5）,c = 19.722（5）,C15H13NO2,Mr = 239.26,V = 1224.4（12）3,Z = 4 and Dc = 1.298 mg/*** final R = 0.0324 for 1627 observed reflections with Ⅰ 〉 2σ（Ⅰ） and Rw = 0.0826 for all *** structure of compound 1 was determined by X-ray diffraction,NMR and HRMS.

关键词： oxazoline phenol 2-[4(S)-4 5-dihydro-4-phenyl-2-ozazolinyl (C15H13NO2) crystal structure

Asymmetric Reduction of Aromatic Ketones Catalyzed by Using (αs,4s)-2-Dichloromethyl-4,5-Dihydro-α-(4-Nitrophenyl)-4- Oxazolemethanol-Borane Complex

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Wuhan University Journal of Natural Sciences 2002年第1期7卷 113-116页

作者： Shi Yu, Hu Quan-yuan, Yang Shao-rong, Hu Xian-ming College of Pharmacy, Wuhan University, Wuhan 430072, Hubei, China College of Pharmacy Wuhan University Wuhan Hubei China

Chiral oxazoborolidine borane complex was prepared from (αs, 4s)-2-dichloromethyl-4, 5-dihydro-α-(4-nitrophenyl)-4-oxazolemethanol with Borane in THF. The borane modified by chiral oxazoborolidine enantioselectively reduced aromatic ketones to second-alcohol with about 95%yield and medium optical yields. In the end of article, results are discussed and reduction mechanism is shown which proves the resulting major isomers fit very well.

关键词： asymmetric reduction prochiral ketones chiral oxazoborolidine borane chloramphenicol oxazoline