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Microwave-assisted Synthesis of Al_(4)SiC_(4) and Its Effect on Properties of MgO-C Refractories
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作者 WANG Li LIU Shijie +7 位作者 WEI Haoyu GUO Yanyan GENG Shangrui YAN Miaoxin QIN Feng GUO Yusen Ma Juanjuan DONG Binbin 《China's Refractories》 CAS 2024年第1期14-17,共4页
Al_(4)SiC_(4) was synthesized from Al powder, silicon carbide, and graphite by microwave sintering, and characterized by XRD and SEM. Then the synthesized material was added to the magnesia carbon refractory brick to ... Al_(4)SiC_(4) was synthesized from Al powder, silicon carbide, and graphite by microwave sintering, and characterized by XRD and SEM. Then the synthesized material was added to the magnesia carbon refractory brick to study its effect on the oxidation resistance, apparent porosity, bulk density, elastic modulus, and modulus of rupture. It is found that Al_(4)SiC_(4) can be synthesized by microwave sintering at 1 300 ℃ and the addition of Al_(4)SiC_(4)-containing material as an antioxidant can enhance the oxidation resistance of the magnesia carbon refractory brick. 展开更多
关键词 microwave-assisted synthesis Al_(4)SiC_(4) MgO-C refractories oxidation resistance
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Aluminum and Activated Alumina Powder Additions on Microwave Synthesis of Al_(4)SiC_(4)
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作者 WANG Li LIU Shijie +6 位作者 WEI Haoyu MA Juanjuan DONG Binbin GENG Shangrui YAN Miaoxin QIN Feng GUO Yusen 《China's Refractories》 CAS 2024年第1期44-48,共5页
Aiming at improving the properties of magnesia carbon materials,silicon aluminum carbide(Al_(4)SiC_(4))containing materials were prepared using industrial aluminum powder,silicon carbide powder,and graphite as raw mat... Aiming at improving the properties of magnesia carbon materials,silicon aluminum carbide(Al_(4)SiC_(4))containing materials were prepared using industrial aluminum powder,silicon carbide powder,and graphite as raw materials,and activated alumina powder as an additive,mixing thoroughly,pressing into cylinders and then firing at 1200℃for 30 min in a carbon embedded atmosphere by the microwave method.The effects of the aluminum powder addition(20%and 24%,by mass)and activated alumina powder addition(0,3%,5%and 7%,by mass)on the microwave synthesis of Al_(4)SiC_(4) as well as the effect of the obtained Al_(4)SiC_(4) containing material on the properties of magnesia carbon bricks were studied.The results show that:compared with the samples with 20%aluminum powder,those with 24%aluminum powder generate more Al_(4)SiC_(4).With the activated alumina powder addition increasing from 0 to 7%,the amount of Al_(4)SiC_(4) generated increases first and then decreases.Compared with the sample without activated alumina powder,the samples with activated alumina powder show lower bulk density and higher apparent porosity.With the activated alumina powder addition increasing from 3%to 7%,the bulk density of the samples increases first and then decreases,while the apparent porosity of the samples shows an opposite trend.The optimal additions are 24%aluminum powder and 5%activated alumina powder,and Al_(4)SiC_(4) synthesized in this sample has a hexagonal plate structure.With the synthesized Al_(4)SiC_(4) containing material added,the magnesia carbon brick has slightly increased cold modulus of rupture,basically the same modulus of elasticity and improved oxidation resistance. 展开更多
关键词 aluminum powder activated alumina powder microwave synthesis Al_(4)SiC_(4) magnesia carbon bricks
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Synthesis and Antitumor Activity of 3-[2-(4-Hydroxy-Phenyl)-Ethyl]-Benzo[d] Isoxazole-4,6-Diol
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作者 Li Wang 《International Journal of Organic Chemistry》 CAS 2023年第1期1-6,共6页
A new phloretin derivative 1 3-[2-(4-hydroxy-phenyl)-ethyl]-benzo[d] isoxazole-4,6-diol (yield 63%) was synthesized from phloretin by carbonyl nucleophilic addition condensation reaction. Its structure was characteriz... A new phloretin derivative 1 3-[2-(4-hydroxy-phenyl)-ethyl]-benzo[d] isoxazole-4,6-diol (yield 63%) was synthesized from phloretin by carbonyl nucleophilic addition condensation reaction. Its structure was characterized by 1H NMR, 13C NMR and HR-MS. The phloretin, compound 1, resveratrol and acetylated resveratrol were determined by comparing them with paclitaxel. Anti-tumor activity of alcohol on SPC-A1, EC109, A549, MCF-7 and MDA-MB-231 cell lines. Compound 1 showed better antitumor activity than docetaxel against A549 tumor cells. 展开更多
关键词 3-[2-(4-Hydroxy-Phenyl)-Ethyl]-Benzo[d] Isoxazole-4 6-Diol synthesis Antitumor Activity
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Green Synthesis and Luminescent Properties of Mn4+ Doped Red Phosphor for WLED
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作者 Xiaoyi Liu Guixia Liu 《Optics and Photonics Journal》 2023年第6期147-155,共9页
Herein, the K<sub>3</sub>MoO<sub>2</sub>F<sub>5</sub><sup>.</sup>2H<sub>2</sub>O:Mn<sup>4+</sup> phosphor was synthesized by using low toxic NH&l... Herein, the K<sub>3</sub>MoO<sub>2</sub>F<sub>5</sub><sup>.</sup>2H<sub>2</sub>O:Mn<sup>4+</sup> phosphor was synthesized by using low toxic NH<sub>4</sub>HF<sub>2</sub> and HCl instead of highly toxic HF. The K3</sub>MoO2</sub>F<sub>5</sub><sup>.</sup><sub></sub>2H2</sub>O:Mn4+</sup> phosphor has a blocky structure and exhibits sharp red emission at the range of 580 to 670 nm excited by the blue light at 470 nm. The fabricated WLED device at 20 mA current has low correlation color temperature (CCT = 3608 K) and high color rendering index (Ra = 90.1), which can significantly improve the electroluminescence performance of cold WLED devices. These results indicate that the K3</sub>MoO2</sub>F5</sub><sup>.</sup>2H2</sub>O:Mn4+</sup> phosphor has potential application value in warm WLED excited by blue light chip. . 展开更多
关键词 Mn4+ Green synthesis PHOSPHOR WLED
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A Convenient Synthesis of Trans and Cis-3, 4′, 5-trihydroxystilbene 被引量:2
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作者 王志新 张学景 +1 位作者 周玥 邹永 《Journal of Chinese Pharmaceutical Sciences》 CAS 2005年第4期204-208,共5页
Aim To synthesize trans and cis-3, 4′, 5-trihydroxystilbene by a new convenient route. Methods The reaction of 3, 5-dimethoxybenzaldehyde (3) and 4-methoxy phenylacetonitrile (4) formed the stilbene skeleton. Aft... Aim To synthesize trans and cis-3, 4′, 5-trihydroxystilbene by a new convenient route. Methods The reaction of 3, 5-dimethoxybenzaldehyde (3) and 4-methoxy phenylacetonitrile (4) formed the stilbene skeleton. After hydrolyzation, decarboxylation, and demethylation, we obtained trans-3, 4′, 5-trihydroxystilbene (resveratrol), which can be converted to its cis-isomer by photochemical isomerization. Results Starting from 3 and 4, trans and cis-3, 4′, 5-trihydroxystilbene were synthesized, respectively. Conclusion A facile method for the synthesis of trans and cis-hydroxystilbenes from readily available materials was established. 展开更多
关键词 3 4 5-trihydroxystilbene synthesis ISOMERIZATION
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Framework-solvent interactional mechanism and effect of NMP/DMF on solvothermal synthesis of [Zn_4O(BDC)_3]_8 被引量:3
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作者 吴争平 王明雪 +4 位作者 周丽姣 尹周澜 谈进 张锦玲 陈启元 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3722-3731,共10页
In order to explore the effect mechanism of solvent on the synthesis of the metal organic framework materials, the microscopic interaction between solvent and framework and the effects of N,N-dimethyl-formamide(DMF) o... In order to explore the effect mechanism of solvent on the synthesis of the metal organic framework materials, the microscopic interaction between solvent and framework and the effects of N,N-dimethyl-formamide(DMF) or N-methyl- 2-pyrrolidone(NMP) on solvothermal synthesis of [Zn4O(BDC)3]8 were investigated through a combined DFT and experimental study. XRD and SEM showed that the absorbability of NMP in the pore of [Zn4O(BDC)3]8 was weaker than that of DMF. The thermal decomposition temperature of [Zn4O(BDC)3]8 synthesized in DMF was higher than that in NMP according to TG and FT-IR. In addition, the nitrogen sorption isotherms indicated that NMP improved gas sorption property of [Zn4O(BDC)3]8. The COSMO optimized calculations indicated that the total energy of Zn4O(BDC)3 in NMP was higher than that in DMF, and compared with non-solvent system, the charge of zinc atoms decreased and the charge value was the smallest in NMP. Furthermore, the interaction of DMF, NMP or DEF in [Zn4O(BDC)3]8 crystal model was calculated by DFT method. The results suggested that NMP should be easier to be removed from pore of materials than DMF from the point of view of energy state. It can be concluded that NMP was a favorable solvent to synthesize [Zn4O(BDC)3]8 and the microscopic mechanism was that the binding force between Zn4O(BDC)3 and NMP molecule was weaker than DMF. 展开更多
关键词 solvothermal synthesis [Zn4O(BDC)3]8 N-METHYL-2-PYRROLIDONE interactional mechanism COSMO solvation model density functional method
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Novel process for large scale synthesis of N-(4-hydroxyphenyl) retinamide 被引量:1
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作者 吴晓晴 余佳 吉民 《Journal of Southeast University(English Edition)》 EI CAS 2008年第2期247-249,共3页
A method to synthesize anticancer drug N-( 4- hydroxyphenyl) retinamide (4-HPR)on a large scale is described. It consists of the preferred steps of reacting all-trans retinoic acid with thionyl chloride to form re... A method to synthesize anticancer drug N-( 4- hydroxyphenyl) retinamide (4-HPR)on a large scale is described. It consists of the preferred steps of reacting all-trans retinoic acid with thionyl chloride to form retinoyl chloride and then reacting with triethylamine to generate retinoyl ammonium salt which in turn is reacted with p-aminophenol to eventually produce 4-HPR. This process can overcome many scale-up challenges that exist in the methods reported in the literature and provide an easy, mild and high yield route for large scale synthesis of 4-HPR. Moreover, the effects of the molar ratios of the reagents on the yield are examined. The best molar ratios are a 2.0 molar equivalence of thionyl chloride and a 3.0 molar equivalence of paminophenol to retinoic acid, and the total yield is 80. 7%. 展开更多
关键词 4-HPR large scale synthesis ANTICANCER
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Ni/ZrO_(2)-SO_(4)^(2-)催化剂的制备及其催化甲烷与CO_(2)制乙酸性能
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作者 任行涛 吴俊 +3 位作者 贾志光 丁靖 万辉 管国锋 《石油化工》 CAS CSCD 北大核心 2024年第4期489-495,共7页
以Zr(NO_(3))4·5H_(2)O和Ni(NO_(3))2·6H_(2)O为原料、(NH4)2CO_(3)为沉淀剂,采用溶胶凝胶-硫酸酸化两步法制备了Ni/ZrO_(2)-SO_(4)^(2-)催化剂,采用XRD,FTIR,SEM,N_(2)吸附-脱附,H_(2)-TPR,NH3-TPD等方法对Ni/ZrO_(2)-SO_(4)... 以Zr(NO_(3))4·5H_(2)O和Ni(NO_(3))2·6H_(2)O为原料、(NH4)2CO_(3)为沉淀剂,采用溶胶凝胶-硫酸酸化两步法制备了Ni/ZrO_(2)-SO_(4)^(2-)催化剂,采用XRD,FTIR,SEM,N_(2)吸附-脱附,H_(2)-TPR,NH3-TPD等方法对Ni/ZrO_(2)-SO_(4)^(2-)催化剂进行表征,考察了Ni的引入方式对催化剂的结构和性能的影响。实验结果表明,与共沉淀方式引入Ni制备的Ni/ZrO_(2)-SO_(4)^(2-)催化剂相比,采用溶胶凝胶方式引入Ni制备的催化剂的四方相ZrO_(2)占比更高,表面酸量更多,且具有良好的热稳定性和较强的L酸性;采用溶胶凝胶方式引入Ni制备的Ni/ZrO_(2)-SO_(4)^(2-)催化剂的乙酸生成量明显优于共沉淀方式引入Ni制备的Ni/ZrO_(2)-SO_(4)^(2-)催化剂。四方相ZrO_(2)、酸性位点和过渡金属Ni之间的协同作用促进了甲烷与CO_(2)直接反应合成乙酸。 展开更多
关键词 Ni/ZrO_(2)-SO_(4)^(2-) 溶胶-凝胶法 甲烷 乙酸 合成
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新型4-苯氧基吡啶类c-Met激酶抑制剂的合成和抗肿瘤活性研究
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作者 刘举 高俊峰 +6 位作者 荆锐 李春艳 王旭 程蒙 陈烨 丁实 沈继伟 《辽宁大学学报(自然科学版)》 CAS 2024年第3期258-264,共7页
为了发现新型高活性c-Met激酶抑制剂,以2-氨基-4-氯吡啶为原料,经醚化、酰化、烷基化、还原和酰化等多步反应,制备了6种未见文献报道的4-苯氧基吡啶类化合物,化合物结构经红外光谱、核磁共振氢谱和质谱确证.生物活性测试结果显示,6种化... 为了发现新型高活性c-Met激酶抑制剂,以2-氨基-4-氯吡啶为原料,经醚化、酰化、烷基化、还原和酰化等多步反应,制备了6种未见文献报道的4-苯氧基吡啶类化合物,化合物结构经红外光谱、核磁共振氢谱和质谱确证.生物活性测试结果显示,6种化合物对MKN-45、A549、H460和HT-294种肿瘤细胞株具有很好的抗增殖活性,两种化合物对c-Met激酶具有很好的抑制活性.其中化合物7b抑制MKN-45、A549、H460和HT-29细胞株的IC 50值分别为1.89、5.14、0.74、0.60μmol/L.该化合物在1000 nmol/L和200 nmol/L的浓度下对c-Met激酶的抑制率分别为96.2%和82.8%,显示出了优异的抗肿瘤活性. 展开更多
关键词 合成 4-苯氧基吡啶 c-Met激酶抑制剂 抗肿瘤活性
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联苯吡菌胺关键中间体3′,4′-二氯-5-氟-1,1′-联苯-2-胺的合成
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作者 黄晓瑛 尚宇 +2 位作者 王威 王列平 毛明珍 《世界农药》 CAS 2024年第1期38-41,49,共5页
为获得联苯吡菌胺关键中间体3′,4′-二氯-5-氟-1,1′-联苯-2-胺的适合工业化生产工艺路线,对其合成工艺进行了优化。以3,4-二氯溴苯和2-溴-4-氟苯胺为原料,经格氏和Suzuki偶联2步反应合成了3′,4′-二氯-5-氟-1,1′-联苯-2-胺,其结构经... 为获得联苯吡菌胺关键中间体3′,4′-二氯-5-氟-1,1′-联苯-2-胺的适合工业化生产工艺路线,对其合成工艺进行了优化。以3,4-二氯溴苯和2-溴-4-氟苯胺为原料,经格氏和Suzuki偶联2步反应合成了3′,4′-二氯-5-氟-1,1′-联苯-2-胺,其结构经1H NMR、MS表征确证,并对合成条件进行了优化。优化条件下,3′,4′-二氯-5-氟-1,1′-联苯2-胺合成总收率61.9%,纯度98%。该工艺成本低,收率高,具有工业化生产前景。 展开更多
关键词 3′ 4′-二氯-5-氟-1 1′-联苯-2-胺 合成 联苯吡菌胺
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联苯吡菌胺中间体2-(3,4-二氯苯基)-4-氟苯胺的合成研究
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作者 曹燕蕾 《现代农药》 CAS 2024年第4期38-40,54,共4页
研究了联苯吡菌胺中间体2-(3,4-二氯苯基)-4-氟苯胺的合成路线。以3,4-二氯苯胺为起始原料,经重氮化、亚硫酸钠还原得到3,4-二氯苯肼,再与4-氟苯胺在碱性条件下通入空气偶联得到目标产物2-(3,4-二氯苯基)-4-氟苯胺。以3,4-二氯苯胺计,... 研究了联苯吡菌胺中间体2-(3,4-二氯苯基)-4-氟苯胺的合成路线。以3,4-二氯苯胺为起始原料,经重氮化、亚硫酸钠还原得到3,4-二氯苯肼,再与4-氟苯胺在碱性条件下通入空气偶联得到目标产物2-(3,4-二氯苯基)-4-氟苯胺。以3,4-二氯苯胺计,目标产物收率80%以上,质量分数90%以上。与其他工艺路线相比,该路线具有原料价廉、易于保存,操作简单,收率较高,易纯化等优点。 展开更多
关键词 2-(3 4-二氯苯基)-4-氟苯胺 联苯吡菌胺 3 4-二氯苯胺 4-氟苯胺 重氮化 合成
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Synthesis and plant-growth regulatory activities of novel imine derivatives containing 1H-1,2,4-triazole and thiazole rings 被引量:6
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作者 Qin, Xue Yu, Hai Bo +5 位作者 Dai, Hong Qin, Zhen Fang Zhang, Xin Bing, Gui Fang Wang, Ting Ting Fang, Jian Xin 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第3期283-286,共4页
Eleven new imine derivatives 6 containing 1H-1,2,4-triazole and thiazole rings were synthesized by the condensation of 5-((1H- 1,2,4-triazol-1-yl)methyl)-4-tert-butylthiazol-2-amine with various substituted benzaldehy... Eleven new imine derivatives 6 containing 1H-1,2,4-triazole and thiazole rings were synthesized by the condensation of 5-((1H- 1,2,4-triazol-1-yl)methyl)-4-tert-butylthiazol-2-amine with various substituted benzaldehydes.The structures of the title compounds were characterized by ~1H NMR,MS and elemental analysis.The plant-growth regulatory activities of these compounds were evaluated.The primary bioassay results indicated that these target compounds exhibited promising plant-growth regulatory activities. 展开更多
关键词 1H-1 2 4-Triazole THIAZOLE synthesis IMINE Plant-growth regulatory activity
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Synthesis and Crystal Structure of 2(1-Phenyl-3-methyl-5-chloro-1H-pyrazol- 4-yl)-3-(1-naphthoylamido)-4-thiazolidinone 被引量:4
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作者 李明 文丽荣 +2 位作者 景淑霞 赵桂龙 杨华铮 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第4期366-370,共5页
The crystal structure of 2(1-phenyl-3-methyl-5-chloro-1H-pyrazol-4-yl)-3-(1- naphthoylamido)-4-thiazolidinone (C24H19ClN4O2S, Mr = 462.94) has been determined by single- crystal X-ray diffraction method. The crystal b... The crystal structure of 2(1-phenyl-3-methyl-5-chloro-1H-pyrazol-4-yl)-3-(1- naphthoylamido)-4-thiazolidinone (C24H19ClN4O2S, Mr = 462.94) has been determined by single- crystal X-ray diffraction method. The crystal belongs to monoclinic, space group P21/c with a = 11.623(5), b = 11.579(5), c = 16.619(7) ? b = 90.112(8), V = 2237(2) 3, Z = 4, Dc = 1.375 g/cm3, m = 0.294 mm-1, F(000) = 960, R = 0.0492 and wR = 0.0768 for 3932 unique reflections with 1897 observed ones (I > 2s(I)). X-ray analysis reveals that there exist both intra-and intermolecular hydrogen bonds in the crystal lattice. 展开更多
关键词 PYRAZOLE 4-THIAZOLIDINONE crystal structure synthesis
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A facile synthesis of 2,4,6-trichloroborazine from boron trichloride-dimethylsulfide complex and ammonium chloride 被引量:4
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作者 Deng, Cheng Song, Yong Cai +3 位作者 Wang, Ying De Li, Yi He Lei, Yong Peng Cao, Shu Wei 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第2期135-138,共4页
2,4,6-Trichloroborazine has been recognized as a desirable monomer for the preparation of high-performance boron nitride fibers through polymer derived ceramics route.So a high yield and facile synthesis of 2,4,6-tric... 2,4,6-Trichloroborazine has been recognized as a desirable monomer for the preparation of high-performance boron nitride fibers through polymer derived ceramics route.So a high yield and facile synthesis of 2,4,6-trichloroborazine is essential in practice. Using boron trichloride-dimethylsulfide complex((CH_3)_2S·BCl_3) and ammonium chloride(NH_4Cl) as starting materials and toluene(C_6H_5CH_3) as solvent,the synthesis of 2,4,6-trichloroborazine to give high yield is reported. 展开更多
关键词 2 4 6-Trichloroborazine Boron trichloride-dimethylsulfide Boron nitride precursor synthesis
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Synthesis,Crystal Structure and Biological Activity of N-(2,6-Difluorobenzoyl)-N'-[5-(4-trifluoromethyl-phenyl)-1,3,4-thiadiazol-2-yl]ure 被引量:4
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作者 邵宇 杨平 +2 位作者 李世荣 王发松 胡卫兵 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第6期848-852,共5页
The title compound N-(2,6-difluorobenzoyl)-N'-[5-(4-trifluoromethylphenyl)-1,3,4-thiadiazol-2-yl]urea(C17H9F5N4O2S,Mr = 428.34) has been synthesized by the reaction of 2-amino-5-(4-trifluoromethylphenyl)-1,3,... The title compound N-(2,6-difluorobenzoyl)-N'-[5-(4-trifluoromethylphenyl)-1,3,4-thiadiazol-2-yl]urea(C17H9F5N4O2S,Mr = 428.34) has been synthesized by the reaction of 2-amino-5-(4-trifluoromethylphenyl)-1,3,4-thiadiazole with 2,6-difluorobenzoyl isocyanate,and its crystal structure was determined by single-crystal X-ray diffraction.The crystal belongs to monoclinic,space group P21/n with a = 10.7316(13),b = 10.5617(13),c = 16.037(2) ,β = 106.408(2)°,V = 1743.6(4) 3,Z = 4,Dc = 1.632 g/cm3,μ = 0.260 mm-1,F(000) = 864,the final R = 0.0599 and wR = 0.1420 for 3467 observed reflections with I〉 2σ(I).The urea group,which adopts a planar configuration mediated by the intramolecular N-H...O hydrogen bond,is nearly coplanar with the thiadiazole and 4-trifluoromethylbenzene rings.The title compound was found to exhibit good fungicidal activity against Rhizoctonia solani and Botrytis cinerea. 展开更多
关键词 1 3 4-thiadiazole aroylurea synthesis crystal structure biological activity
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Synthesis and Crystal Structure of Calix[4]arene Bearing a 1,8-Bis(propoxy)anthracene-9,10-dione 被引量:5
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作者 顾绍金 秦大斌 敬林海 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第9期1035-1038,共4页
The title complex (C50H44C14O8) was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/n with a = 19.7768(4), b =10.2085(2), c = 21... The title complex (C50H44C14O8) was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/n with a = 19.7768(4), b =10.2085(2), c = 21.2721(4)A,β= 97.153(1)°, V = 4261.23(14)A^3, Z = 4, Mr = 914.65, F(000) = 1904, Dc = 1.426 g/cm^3,μ = 0.336, the final R = 0.0550 and wR = 0.1647. The compound was structurally characterized by IR and ^1H NMR. The molecules are stacked through C-H...π interactions and intermolecular C-H...O hydrogen bonds. 展开更多
关键词 arene derivative synthesis crystal structure
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A new isochroman-4-one derivative from the peel of Musa sapientum L.and its total synthesis 被引量:4
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作者 Hai Qian Wen Long Huang +3 位作者 Xiao Ming Wu Hui Bin Zhang Jin Pei Zhou Wen Cai Ye 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第10期1227-1230,共4页
A new isochroman-4-one, 7,8-dihydroxy-3-methylisochroman-4-one was isolated from water soluble fraction of Musa sapientum L. Its structure was determined by spectroscopic evidences and its total synthesis has also bee... A new isochroman-4-one, 7,8-dihydroxy-3-methylisochroman-4-one was isolated from water soluble fraction of Musa sapientum L. Its structure was determined by spectroscopic evidences and its total synthesis has also been reported. The compound showed potent antihypertensive activity. 展开更多
关键词 Isochroman-4-one Musa sapientum L. ISOLATION Total synthesis
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First total synthesis of (±)-puyanin and (±)-4'-O-methylbonannione 被引量:3
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作者 Jin Hui Yang Yu Heng Zhang Hong Jun Li Shi Zhi Jiang Yun Feng Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第11期1267-1269,共3页
A facile approach for the first total synthesis of two naturally occurring geranylated flavonoids,(±)-puyanin 1 and(±)-4'-O- methylbonannione 2 has been obtained with total yield 27%and 21%,respectively... A facile approach for the first total synthesis of two naturally occurring geranylated flavonoids,(±)-puyanin 1 and(±)-4'-O- methylbonannione 2 has been obtained with total yield 27%and 21%,respectively.The key steps were regioselective cyclization of geranylated trihydroxychalcone and regioselective geranylation of 2,4,6-trihydroxyacetophenone. 展开更多
关键词 Puyanin 4'-O-Methylbonannione FLAVANONE Geranylated flavonoids Total synthesis
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Synthesis and biological evaluation of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates against Eimeria tenella 被引量:5
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作者 Zhang, Yuan Yuan Zeng, Xing Yan +3 位作者 Nie, Kui Zhong, Zhi Cheng Wang, Yu Liang Wang, Yu Zhong 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第4期426-428,共3页
A series of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates were designed and synthesized.Their structures were confirmed by ~1H NMR,^(13)C NMR,IR and HRMS.The biological activities were primarily evaluated ... A series of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates were designed and synthesized.Their structures were confirmed by ~1H NMR,^(13)C NMR,IR and HRMS.The biological activities were primarily evaluated against Eimeria tenella according to Anticoccidial Index(ACI) method in vivo.The results showed that compounds 5e,5f and 5i exhibited anticoccidial activities against E.tenella at 27 mg kg^(-1). 展开更多
关键词 Ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylate synthesis Anticoccidial activity Eimeria tenella
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Microwave synthesis of Li_2FeSiO_4 cathode materials for lithium-ion batteries 被引量:20
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作者 Zhong Dong Peng Yan Bing Cao Guo Rong Hu Ke Du Xu Guang Gao Zheng Wei Xiao 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第8期1000-1004,共5页
A novel synthetic method of microwave processing to prepare Li2FeSiO4 cathode materials is adopted. The Li2FeSiO4 cathode material is prepared by mechanical ball-milling and subsequent microwave processing. Olivin-typ... A novel synthetic method of microwave processing to prepare Li2FeSiO4 cathode materials is adopted. The Li2FeSiO4 cathode material is prepared by mechanical ball-milling and subsequent microwave processing. Olivin-type Li2FeSiO4 sample with uniform and fine particle sizes is successfully and fast synthesized by microwave heating at 700 ℃ in 12 rain. And the obtained Li2FeSiO4 materials show better electrochemical performance and microstructure than those of Li2FeSiO4 sample by the conventional solidstate reaction. ?2009 Yan Bing Cao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. 展开更多
关键词 Li-ion battery Cathode material Microwave synthesis LI2FESIO4
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