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Cu/Picolinamides-Catalyzed Coupling of (Hetero) aryl Halides with Secondary Phosphine Oxides and Phosphite

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Chinese Journal of Chemistry 2021年第11期39卷 2957-2961页

作者： Chao Fang Bangguo Wei dawei ma Department of Natural Medicine School of PharmacyFudan University826 Zhangheng RoadShanghai201203 China State Key Laboratory of Bioorganic&Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling LuShanghai200032 China

Some 4-hydroxy-picolinic acid derived amides were revealed as more efficient ligands for Cu-catalyzed coupling of(hetero)aryl halides with secondary phosphine oxides and *** 3—5 mol%CuI and ligands were required to e... 详细信息

关键词： Synthetic methods Cross-Coupling Aryl halides Copper Aryl phosphine oxides

An efficient synthesis of isocoumarins via a CuI catalyzed cascade reaction process

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Science China Chemistry 2009年第10期52卷 1616-1621页

作者： WANG LeiLei ZHANG XiaoJing JIANG YongWen ma dawei Shenyang Pharmaceutical University Shenyang 110016China State Key Laboratory of Bioorganic Chemistry and Natural Products Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

3-Alkyl isocoumarins are provided by CuI/amino acid-catalyzed Sonogashira coupling reaction of o-bromo benzoic acids and terminal alkynes and the subsequent additive cyclization. This cascade process allows synthesis ... 详细信息

关键词： coupling cascade reaction copper iodide isocoumarins

Selective transmission and channel estimation in massive MIMO systems

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High Technology Letters 2016年第1期22卷 99-106页

作者：杨睿哲 Zong Liang Si Pengbo ma dawei Zhang Yanhua Beijing Advanced Innovation Center for Future Internet Technology Beijing University of Technology College of Electronics Information and Control Engineering Beijing University of Technology

massive MIMO systems have got extraordinary spectral efficiency using a large number of base station antennas,but it is in the challenge of pilot contamination using the aligned *** address this issue,a selective transmission is proposed using time-shifted pilots with cell grouping,where the strong interfering users in downlink transmission cells are temporally stopped during the pilots transmission in uplink *** on the spatial characteristics of physical channel models,the strong interfering users are selected to minimize the inter-cell interference and the cell grouping is designed to have less temporally stopped users within a smaller ***,a Kalman estimator is proposed to reduce the unexpected effect of residual interferences in channel estimation,which exploits both the spatial-time correlation of channels and the share of the interference *** numerical results show that our scheme significantly improves the channel estimation accuracy and the data rates.

关键词： multiple-input multiple-output (MIMO) selective transmission time-shifted pilots Kalman

Effects of coal-fired power plants on soil microbial diversity and community structures

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Journal of Environmental Sciences 2024年第3期137卷 206-223页

作者： Bowen Sun Renbin Zhu Yu Shi Wanying Zhang Zeming Zhou dawei ma Runfang Wang Haitao Dai Chenshuai Che Institute of Polar Environment&Anhui Key Laboratory of Polar Environment and Global Change School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 450046China State Grid Anhui Electric Power Research Institute Hefei 230601China

Long-term deposition of atmospheric pollutants emitted from coal combustion and their effects on the eco-environment have been extensively studied around coal-fired power ***,the effects of coal-fired power plants on soil microbial communities have received little attention through atmospheric pollutant deposition and ***,we collected the samples of power plant soils(PS),coal-stacking soils(CSS)and agricultural soils(AS)around three coal-fired power plants and background control soils(BG)in Huainan,a typical mineral resource-based city in East China,and investigated the microbial diversity and community structures through a high-throughput sequencing ***-stacking significantly increased(pmarchaeota,Thermoplasmata,Ascomycota and Basidiomycota were the dominant taxa in all *** bacterial community showed significant differences(pmatter(OM)-Mo,*** soil microbial genera were closely related to multiple key factors associated with stacking coal and heavy metal deposition from power *** study provided useful insight into better understanding of the relationships between soil microbial communities and long-term disturbances from coal-fired power plants.

关键词： Coal-fired power plants Soil microbial communities Coal-stacking Heavy metals Environmental variables

A New Class of Amide Ligands Enable Cu-Catalyzed Coupling of Sodium Methanesulfinate with （Hetero）aryl Chlorides

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Chinese Journal of Chemistry 2017年第11期35卷 1661-1664页

作者： dawei ma Songtao Niu Jinlong Zhao Xi Jiang Yongwen Jiang Xiaojing Zhang Tiemin Sun State Key Laboratory of Bioorganic and Natural Products Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China Shenyang Pharmaceutical University 103 Wenhua Lu Shenyang 110016 China

（（2S,4R）-4-Hydroxy-N-（2-methylnaphthalen-l-yl）pyrrolidine-2-carboxamide （HMNPC）, an amide derived from 4-hydroxy-L-proline and 2-methyl naphthalen-l-amine, is a powerful ligand for Cu-catalyzed coupling of （het- ero）aryl halides with sulfinic acid salts, allowing for first time the metal-catalyzed coupling of （hetero）aryl chlorides and NaSO2Me. A considerable number of （hetero）aryl chlorides worked well, providing the pharmaceutically im- portant （hetero）aryl methylsulfones in good to excellent yields.

关键词： (hetero)aryl methylsulfone coupling reaction (hetero)aryl halides ligand copper

Target Synthesis Directed Methodology Development

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Target Synthesis Directed Methodology Development

中国化学会全国第十二届有机合成化学学术研讨会

作者： ma,dawei State Key Laboratory of Bioorganic and Natural Products Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences

＜正＞Development of new synthetic methodologies plays an irreplaceable role in the synthesis of natural products and designed bioactive *** the other hand,the structures of the synthetic targets can shed a light on discovery of new reactions and synthetic *** this lecture we will describe our recent progress in Cu-catalyzed arylation

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氨基酸衍生物的反应、合成和生物活性研究

有机化学 2001年第11期21卷 842-849页

作者：马大为中国科学上海有机化学研究所，生命有机化学国家重点实验室，上海200032

讨论了我们小组近年来以氨基酸衍生物为主线,在代谢型谷氨酸受体及蛋白激酶C有选择性的调节剂的发现和合成,在发展新反应以及天然产物合成方面所取得的一些结果.

关键词：氨基酸衍生物生物活性有机合成蛋白激酶C 天然产物代谢型谷氨酸受体小分子调节剂

Association of serum lipids and severity of epithelial ovarian cancer：an observational cohort study of 349 Chinese patients

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The Journal of Biomedical Research 2018年第5期32卷 336-342页

作者： Yi Zhang Jing Wu Junya Liang Xing Huang Lei Xia dawei ma Xinyu Xu Pingping Wu Department of Pathology Jiangsu Institute of Cancer Research the Affiliated Cancer Hospital of Nanjing Medical University Nanjing Jiangsu 210009 China Department of Radiation Oncology Jiangsu Cancer Hospital Jiangsu Institute of Cancer Research the Affiliated Cancer Hospital of Nanjing Medical University Nanjing Jiangsu 210009 China The School of Public Health Nanjing Medical University Nanjing Jiangsu 211166 China Department of Oncology Jiangsu Cancer Hospital Jiangsu Institute of Cancer Research the Affiliated Cancer Hospital of Nanjing Medical University Nanjing Jiangsu 210009 China.

While obesity and fat intake have been associated with the risk and prognosis of epithelial ovarian cancer, the association between the lipid levels and epithelial ovarian cancer phenotype remains controversial. We conducted a retrospective study of 349 epithelial ovarian cancer patients who received treatment at Jiangsu Cancer Hospital, China between 2011 and 2017. We analyzed age at diagnosis, blood pressure, plasma glucose content, body mass index（BMI）, lipid levels and clinical parameters. Severity of epithelial ovarian cancer was classified according to the International Federation of Gynecology and Obstetrics（FIGO） grading system. Univariate analysis of the clinical factors according to the severity of epithelial ovarian cancer was followed by logistic regression analysis to identify clinical factors significantly associated with epithelial ovarian cancer severity. Univariate analysis indicated that age,BMI, triglyceride（TG）, and high density lipoproteins（HDL） differed significantly among different stages of epithelial ovarian cancer（P〈0.05）. In the logistic regression model, elevated TG（OR： 1.883; 95% CI= 1.207-2.937）, and low HDL（OR： 0.497; 95% CI = 0.298-0.829） levels were significantly associated with the high severity epithelial ovarian cancer. Our data indicate that high TG and low HDL levels correlate with a high severity of epithelial ovarian cancer. These data provide important insight into the potential relationship between the lipid pathway and epithelial ovarian cancer phenotype and development.

关键词： triglycerides epithelial ovarian cancer high density lipoproteins dyslipidemia clinical data statistics

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铁道车辆制动热负荷的计算及应用

中国铁道科学 2000年第4期21卷 30-37页

作者：马大炜铁道部科学研究院

制动热负荷对铁道车辆的制动能力和装置使用寿命有重要的影响。文中根据轴重、速度和紧急制动能力 (减速度 ) ,对不同客货车辆的制动热负荷从停车制动能量和平均轴制动功率两方面进行了计算比较。并按照不同基础制动装置的制动热负荷能... 详细信息

制动热负荷对铁道车辆的制动能力和装置使用寿命有重要的影响。文中根据轴重、速度和紧急制动能力 (减速度 ) ,对不同客货车辆的制动热负荷从停车制动能量和平均轴制动功率两方面进行了计算比较。并按照不同基础制动装置的制动热负荷能力 ,分析了踏面制动方式和盘形制动方式适应的速度范围 ,包括准高速客车提速到 2 0 0 km· h-1的盘形制动设计问题和高速列车复合制动的制动热负荷问题。从而提出了重载、高速铁道车辆的有关制动热负荷的设计限界。

关键词：制动装置热负荷重载高速铁路车辆计算应用