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Synthesis and Identification of Some New Tetrazole Derivatives from 4,5-dichloro Imidazole and Study of Their biological activity

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Journal of Chemistry and Chemical Engineering 2016年第7期10卷 347-352页

作者： Zainab fadhil Shaimaa Adnan Department of chemistry College of Education Univeristy of AI-QadisiyahIraq

A number of tetrazoles derivatives were prepared by series of steps, the first step includes react （4,5-dichloroimidazole） with （4-aminoacetophenone） to form 1-（4-（（4,5-dichloro-lH-imidazol-2yl）diazenyl）ethanone （1）. The second step was （1） reaction with （Amines derivatives） to get Schiff bases （2-7）. The third step was reaction of Shciff base with sodiumazide to form tetrazoles derivatives （8-13）. then study the biological activity.for all compounds to word two type of bacteria.

关键词： Azo Schiffbase tetrazole imidazole biological activity.

A Concise Total Synthesis of S-(+)-Tylophorine

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Chinese Chemical Letters 2004年第10期15卷 1164-1166页

作者： ZhongJIN ShiPuLI QingMinWANG RunQiuHUANG StateKeyLaboratoryofElemento-OrganicChemistry NankaiUniversityTianjin300071

A highly efficient total synthesis of S-(+)-tylophorine has been accomplished in fully asymmetric fashion.

关键词： Phenanthroindolizidine alkaloid tylophorine biological activity.

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Convenient Synthesis of Two Novel Oxazolidines and Primary Research on their biological Activities

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Chinese Chemical Letters 2006年第7期17卷 891-894页

作者： Ying Jiao LI Fei YE College of Science Northeast Agricultural University Harbin 150030

Two novel N-dichloroacetyl oxazolidines were synthesized with a simple, mild and convenient method in good yields. The compounds were Characterized by IR, 1^H NMR and elemental analysis. The preliminary biological tes... 详细信息

关键词： Herbicide safener oxazolidines biological activity.

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Approach to synthesis and structure of chiral multi-functionalized organophosphorus derivatives

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Science Bulletin 2003年第4期48卷 323-328页

作者： FU Yuqin, FAN Xue, WANG Jiange, KANG Haixia & CHEN Qinghua Department of Chemistry, Luoyang Normal College, Luoyang 471022, China Correspondence should be addressed to Chen Qinghua Department of Chemistry Luoyang Normal College Luoyang 471022 China

The diastereomerically pure organophosphorus derivatives containing multiple chiral centers 5 and 5 were obtained, respectively, in 62%-84% yields with ≥98% de (diastereomeric excess) via asymmetric reaction of the chiron, 3-bromo-2(5H)-furanone 4 with racemic diethyl a-hydroxyl- substituted-phosphonates 3 + 3 and further through the separation of the diastereomeric mixture by chromatography. The structures of the chiral organophosphorus derivatives were identified on the basis of their elementary and spectro-scopic data, such as IR, 1H NMR, 13C NMR, MS and X-ray crystallography. In this report, the synthetic methods of the active organophosphorus substrates, the structure charac-terization and resolution, the optical purity and the stereo-chemistry of the chiral products were discussed. These re-sults provide a new idea and a good method for synthesizing some natural organophosphorus compounds and approach-ing their biological activities, also a facile route to the appli-cation of organophosphorus substrates.

关键词： diastereomerically pure organophosphorus derivatives tandem asymmetric reaction racemic diethyl a-hydroxyl-substi- tuted-phosphonate biological activity.

Obtaining Sulfur Nanoparticles from Sodium Polysulfide Aqueous Solution

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Journal of Chemistry and Chemical Engineering 2012年第3期6卷 233-241页

作者： Massalimov Ismail Alexandrovich Mustafin Akhat Gazizyanovich Shangareeva Alina Rifhatovna Bashkir State University Laboratory of Technology of Mechanochemical Processes Research Technological Institute of Herbicides and Plant Growth Regulators the Academy of Sciences

This paper thoroughly studies the＇. process of obtaining sulfur nanoparticles in aqueous medium from sodium polysulfide. Nanosize sulfur particles with orthorhombic structure were obtained at room temperature by mixing sodium polysulfide aqueous solution with various inorganic and organic acids. Sulfur nanoparticles were characterized by laser particle-size analyzer, X-ray diffraction, electron probe microscopy. Size of sulfur nanoparticles in aqueous dispersion is affected ;trongly by acid concentration, as well as nature of alcohols, used as wetting agents when measuring sulfur particles size iin aqueous medium. Availability of obtaining sulfur nanoparticles of 22-25 nm average si;,e in aqueous medium was revealed. High biological activity.of sulfur nanoparticles and ethylalcohol composition on wheat grain couching was established.

关键词： Sulfur nanoparticles sodium polysulfide aqueous solution alcohols biological activity.