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Lipases catalyzed acetylation of meso-2,4-dimethyl-1,5-pentanediol and the synthesis of Prelog-Djerassi lactone

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Chinese Journal of Chemistry 1995年第4期13卷 380-384页

作者： lin, gq.XU, WC CHINESE ACAD SCI SHANGHAI INST ORGAN CHEMSHANGHAI 200032PEOPLES R CHINA

Lipase catalyzed acetylation of 2 afforded 3 with the e.e. up to 98%. Utility of 3 was illustrated by the preparation of Prelog-Djerassi lactones 7a and 7b.

关键词： LIPASE (2R,4S)-5-ACETOXY-2,4-DIMETHYL-PENTANOL PRELOG-DJERASSI LACTONE

The Stereoselective Formal Synthesis of (-)-Slaframine

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Chinese Chemical Letters 1998年第11期9卷 999-0,0-0页

作者： Dong, HQ lin, gq Chinese Acad Sci Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

The stereoselective synthesis of (-)-slaframine has been achieved by utilizing the Sharpless asymmetric epoxidation of divinylcarbinol (2) and the regio-selective dihydroxylation of compound 4 as the key steps.

关键词： (-)-slaframine divinylcarbinol Sharpless asymmetric epoxidation Sharpless asymmetric dihydroxylation

The Formal Stereoselective Synthesis of(+)-Preussin

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Chinese Chemical Letters 1997年第8期8卷 693-694页

作者： Dong, HQ lin, gq CHINESE ACAD SCI SHANGHAI INST ORGAN CHEMSHANGHAI 200032PEOPLES R CHINA

The stereoselective synthesis of (+)-preussin has been achieved by utilizing the Sharpless asymmetric epoxidation of the divinylcarbinol (3) and the oxidative cyclization of 9 with PDC as the key steps.

关键词： The Formal Stereoselective Synthesis of DMF 甲酰胺 Preussin

Microbial-chemical routes to R and S-denopamine a useful drug for congestive heart failure

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Chinese Journal of Chemistry 1995年第5期13卷 475-480页

作者： Gu, JX Li, ZY lin, gq CHINESE ACAD SCI SHANGHAI INST ORGAN CHEMSHANGHAI 200032PEOPLES R CHINA

Both enantiomers of denopamine were synthesized using microbial-chemical approach via bioreduction of 1-(acetoxyphenyl)ketone 4(R=CH2Cl) and 5(R=CO(2)Et) with fungus Geotrichum sp. G38.

关键词： denopamine bioreduction Geotrichum sp G38 asymmetric synthesis

Eremophilenolides from Cacalia Roborowskii

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Chinese Chemical Letters 1998年第1期9卷 65-68页

作者： Zhang, SM Zhao, GL lin, gq Chinese Acad Sci Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

From the extracts of the roots of Cacalia roborowskii (Maxim) ling, five new eremophilenolides were isolated and their structures identified as 8 beta, 10 beta-dihydroxy-6 beta-methoxyleremophilenolide (1), 3 beta-acetoxyl-8 beta, 10 beta -dihydroxy-6 beta-methaxyeremophilenolide (2), 3 beta-angeloyloxy-8 beta-, 10 beta-dihydroxy-6 beta-methoxyeremophilenolide (3), 3 beta-(2-methylbutyryloxy)-8 beta, 10 beta-dihydroxy-6 beta-methoxyeremophilenolide (4), and 8 beta-hydroxy-6 beta-methoxyeremophil-7(11), 9-dien-8, 12-olide(5), based on 1D and 2D NMR experiments.

关键词： eremophilenolide root herb Cacalia roborowskii (maxim) ling

A New Approach to the Construction of Pyrrolizidine and Indolizidine Skeleton: Enantioselective Synthesis of (1S, 7aS)-1-hydroxypyrrolizidine and (1S, 8aS)-1-hydroxyindolizidine

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Chinese Chemical Letters 1997年第9期8卷 773-776页

作者： Dong, HQ Shi, ZC lin, gq CHINESE ACAD SCI SHANGHAI INST ORGAN CHEMSHANGHAI 200032PEOPLES R CHINA

A new approach to the construction of pyrrolizidine and indolizidine skeleton was described. By employing this cyclization method the synthesis of (1S. 7aS)-1-hydroxypyrrolizidine (1a) and (1S. 8aS)-1-hydroxyindolizidine (1b) was achieved by treatment of the trimesylate 6a or 6b with aqueous ammonia in the presence of KaCO(3) (or Cs2CO3) in one-pot fashion.

关键词： ppm HRMS A New Approach to the Construction of Pyrrolizidine and Indolizidine Skeleton hydroxyindolizidine hydroxypyrrolizidine and Enantioselective Synthesis of

Eremophilane Sesquiterpenes from Cacalia Roborowskii

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Chinese Chemical Letters 1998年第1期9卷 61-64页

作者： Zhang, SM Zhao, GL Li, R lin, gq Chinese Acad Sci Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

Four new eremophilane type sesquiterpenes were isolated from the roots of Cacalia roborowskii (Maxim) ling. Their structures were established as 8-oxo-eremophila-6, 9-dien-12-oic acid (1), 3 beta-acetoxyl-8-oxo-eremophila-6, 9-dien-12-oic acid (2), 3 beta-angeloyoxyl-8-oxo-eremophilad, 9-dien-12-oic acid (3) and 3 beta-(2-methylbutyryloxyl)-8-oxo-eremophilia-6,9-dien-12-oic acid (4) by means of 1D and 2D NMR spectroscopy.

关键词： eremophilane sesquiterpene Cacalia roborowskii

Efects of idle time on biological phosphorus removal by sequencing batch reactors

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Journal of Environmental Sciences 2013年第12期25卷 2396-2402页

作者： Dawen Gao Hang Yin lin Liu Xing Li Hong Liang School of Forestry Northeast Forestry University State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Institute of Urban Environment Chinese Academy of Sciences

Three identical sequencing batch reactors （SBRs） were operated to investigate the effects of various idle times on the biological phosphorus （P） removal. The idle times were set to 3 hr （R1）, 10 hr （R2） and 17 hr （R3）. The results showed that the idle time of a SBR had potential impact on biological phosphorus removal, especially when the influent phosphorus concentration increased. The phosphorus removal efficiencies of the R2 and R3 systems declined dramatically compared with the stable R1 system, and the Prelease and P-uptake rates of the R3 system in particular decreased dramatically. The PCR-DGGE analysis showed that uncultured Pseudomonas sp. （gq.83242.1） and β-Proteobacteria （AY823971） were the dominant phosphorus removal bacteria for the R1 and R2 systems, while uncultured γ-Proteobacteria were the dominant phosphorus removal bacteria for the R3 system. Glycogen-accumulating organisms （GAOs）, such as uncultured Sphingomonas sp. （AM889077）, were found in the R2 and R3 systems. Overall, the R1 system was the most stable and exhibited the best phosphorus removal efficiency. It was found that although the idle time can be prolonged to allow the formation of intracellular polymers when the phosphorus concentration of the influent is low, systems with a long idle time can become unstable when the influent phosphorus concentration is increased.

关键词： biological phosphorus removal polyphosphate-accumulating organisms idle time microbial community

Annealing Effect on Transport and Magnetic Properties of La_(0.67)Sr_(0.33)MnO_3 Thin Films Grown on Glass Substrates by RF Magnetron Sputtering

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Journal of Materials Science & Technology 2011年第3期27卷 223-226页

作者： Shaojie Fang Zhiyong Pang Fenggong Wang Liang lin Shenghao Han School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan250100 China School of Space Science and Applied Physics Shandong University at Weihai Weihai 264209 China

The manganite La0.67Sr0.33MnO3 （LSMO） thin films were grown on glass substrates in a mixed argon and oxygen atmosphere by using RF magnetron sputtering. The structural characteristics, transport behaviors and magnetic properties of LSMO films were studied by annealing the films in air at 550 and 620℃. The out-of-plane lattice parameter αLSMO contracted after annealing and was close to that of bulk LSMO abulk, indicating that the internal strain was fully relaxed. Nanocrystalline grains were observed in the annealed films. Enhanced saturation magnetization and metal-to-insulator transition temperature （TMI=268 K） were also obtained. Curie temperatures （Tc） of the as-grown films was 340 K with the same as that of annealed at 550℃, but dropped to 315 K when the annealing temperature increased to 620℃, which can be attributed to the oxygen release during annealing in atmosphere.

关键词： La0.67Sr0.33MnO3 Annealing Magnetron sputtering Nanocrystalline