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Spectral Properties and Solubilization Location of 2′-Ethylhexyl 4-(N,N-Dimethylamino)benzoate in Micelles
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作者 Ning Ding Xin-zhen Du +1 位作者 Chun Wang Xiao-quan Lu 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 北大核心 2008年第2期163-168,共6页
Dual fluorescence and UV absorption of 2′-ethylhexyl 4-(N,N-dimethylamino)benzoate (EHDMAB) were investigated in cationic, non-ionic and anionic micelles. When EHDMAB was solubilized in different micelles, the UV... Dual fluorescence and UV absorption of 2′-ethylhexyl 4-(N,N-dimethylamino)benzoate (EHDMAB) were investigated in cationic, non-ionic and anionic micelles. When EHDMAB was solubilized in different micelles, the UV absorption of EHDMAB was enhanced. Twisted intramolecular charge transfer (TICT) emission with longer wavelength was observed in ionic micelles, whereas TICT emission with shorter wavelength was obtained in non-ionic micelles. In particular, dual fluorescence of EHDMAB was significantly quenched by the positively charged pyridinium ions arranged in the Stern layer of cationic micelles. UV radiation absorbed mainly decays via TICT emission and radiationless deactivation. The dimethylamino group of EHDMAB experiences different polar environments in ionic and non-ionic micelles according to the polarity dependence of TICT emission of EHDMAB in organic solvents. In terms of the molecular structures and sizes of EHDMAB and surfactants, each individual EHDMAB molecule should be buried in micelles with its dimethylamino group toward the polar head groups of different micelles and with its 2′-ethylhexyl chain toward the hydrophobic micellar core. Dynamic fluorescence quenching measurements of EHDMAB provide further support for the location of EHDMAB in different micelles. 展开更多
关键词 Dual fluorescence Twisted intramolecular charge transfer UV absorption Surfactant 2-Ethylhexyl 4-(N N-dimethylamino)benzoate SUNSCREEN
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Synthesis, Bioactivity, and Crystal Structure Analysis of 2-(3-Oxobenzo[d]isothiazol-2(3H)-yl)ethyl Benzoates 被引量:3
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作者 王向辉 游诚航 林强 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第8期1123-1130,共8页
Fifteen novel 2-(3-oxobenzo[d]isothiazol-2(3H)-yl)ethyl benzoates were synthesi- zed by the condensation of 2-(2-hydroxyethyl)benzo[d]isothiazol-3(2H)-one with substituted benzoic acids in dichloromethane. All... Fifteen novel 2-(3-oxobenzo[d]isothiazol-2(3H)-yl)ethyl benzoates were synthesi- zed by the condensation of 2-(2-hydroxyethyl)benzo[d]isothiazol-3(2H)-one with substituted benzoic acids in dichloromethane. All the compounds were characterized by elemental analysis, IR, ESI-MS and 1H NMR. The crystal structures for 2-(2-hydroxyethyl)benzo[d]isothiazol-3(2H)-one (2) and 2-(3-oxobenzo[d]isothiazol-2(3H)-yl)ethyl 2-methoxybenzoate (30) have been determined by X-ray crystal structure analysis. Compound 2 (C9H9NO2S) crystallizes in the monoclinic system, space group Pn with a = 10.552(3), b = 7.849(2), c = 10.765(4) A, β = 103.128(4)°, V= 868.3(5) A3, Mr = 195.24, Dc = 1.493 Mg.m-3, μ = 0.33 mm-1, F(000) = 408, Z = 4, R= 0.0314 and wR= 0.0628. Compound 30 (C17H15NO4S) crystallizes in the triclinic system, space group P1 with a = 8.028(2), b = 9.300(2), c = 10.430(3)A, V= 752.1(3)A3, Mr = 329.36, D,= 1.454 Mg.m-3, p = 0.24 mm-1, F(000) = 344, Z = 2, R = 0.0377 and wR = 0.0904. The preliminary biological test indicated that the title compounds show better growth inhibitory activity against the gram-positive bacteria than the gram-negative bacteria. 展开更多
关键词 2-(3-oxobenzo[d]isothiazoi-2(3H)-yl)ethyl benzoates synthesis crystal structure hydrogen bonds
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A 3-fold Interpenetrated lvt Cd(Ⅱ) Network Constructed from 4-[(3-pyridyl)methylamino]benzoate Acid
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作者 王庆伟 陈琳 +2 位作者 齐晓飞 王亚男 刘博 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第5期757-763,共7页
A new three-dimensional(3D) coordination polymer, [Cd(L)2H2O]n·5nH2O 1 with 4-[(3-pyridyl)methylamino]benzoate acid(HL), has been synthesized by slow evaporation solvent at room temperature, and structura... A new three-dimensional(3D) coordination polymer, [Cd(L)2H2O]n·5nH2O 1 with 4-[(3-pyridyl)methylamino]benzoate acid(HL), has been synthesized by slow evaporation solvent at room temperature, and structurally characterized by elemental analysis, IR spectrum, thermal analysis, fluorescence spectrum and single-crystal X-ray diffraction. Compound 1 crystallizes in the tetragonal system, space group I-4, with a = 20.7937(16), c = 13.515(2), V = 5843.5(11) 3, C26H34CdN4O10, Mr = 674.97, Dc = 1.534 g/cm3, μ(MoKα) = 0.808 mm-1, F(000) = 2768, Z = 8, the final R = 0.0276 and wR = 0.0691 for 5323 observed reflections(I 〉 2σ(I)). The result of thermal analysis shows that 1 is stable under 290 ℃. Moreover, it exhibits blue photoluminescence at room temperature. 展开更多
关键词 4-[(3-pyridyl)methylamino]benzoate acid lvt topology 3-fold interpenetrated luminescent property
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Synthesis and anti-inflammatory-analgesic activity of 2',4'-difluoro-3-(carbamoyl)biphenyl-4-yl benzoates
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作者 Guang Xiang Zhong Lu Lu Chen Jian Li Wei Xiao Hu Min You Qi 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第12期1419-1422,共4页
Eighteen 2′,4′-difluoro-3-(carbamoyl)biphenyl-4-yl benzoates were synthesized from diflunisal in three steps with total yields from 72% to 86%. All compounds were identified by IR, 1^H NMR, MS and elemental analys... Eighteen 2′,4′-difluoro-3-(carbamoyl)biphenyl-4-yl benzoates were synthesized from diflunisal in three steps with total yields from 72% to 86%. All compounds were identified by IR, 1^H NMR, MS and elemental analysis. The anti-inflammatory activity and analgesic activity for 18 compounds were evaluated. The preliminary assay results showed that compounds 4a and 4p exhibited potent anti-inflammatory-analgesic activity. 展开更多
关键词 2 4′-Difluoro-3-(carbamoyl)biphenyl-4-yl benzoate Anti-inflammatory activity Analgesic activity DIFLUNISAL
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Synthesis and Crystal Structure of Tert-butyl 4-[(E)-4-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-1-butenyl] Benzoate
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作者 张新歌 张慧杰 +1 位作者 王瑱 李朝兴 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第3期300-304,共5页
The title compound tert-butyl 4-[(E)-4-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)- 1-butenyl] benzoate has been synthesized and characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c... The title compound tert-butyl 4-[(E)-4-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)- 1-butenyl] benzoate has been synthesized and characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c with a = 14.875(3), b = 8.9796(13), c = 34.736(6) A°, β = 95.981(4)°, V= 4614.4(14)A°^3, Z= 8, Dc = 1.213 g/cm^3, F(000) = 1792,μ(MoKα) = 0.084 mm^-1, R = 0.0602 and wR = 0.1445 for 4613 unique reflections with 2272 observed ones (I〉 2σ(I)). The results of crystal structure determination show that the title compound has a layer structure, and the two benzene rings in molecule are parallel to each other. 展开更多
关键词 tert-butyl 4-[(E)-4-(1 3-dioxo-1 3-dihydro-2H-isoindol-2-yl)-1-butenyl]benzoate synthesis crystal structure
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Synthesis, Structure and Photocatalytic Activity of Two 4-(2,6-Di(pyrazin-2-yl)pyridin-4-yl)benzoate-Based Chain Complexes
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作者 王志宏 郝瑞 +1 位作者 祝爽 赵小军 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第5期803-810,共8页
Two new one-dimensional chains extended by alternate benzenedicarboxylate(BDC) and 4-(2,6-di(pyrazin-2-yl)pyridin-4-yl)benzoate(L-) connectors, {[Cu(L)(BDC)(0.5)]·3.5 H2 O}n (1) and {[Zn(L)(BD... Two new one-dimensional chains extended by alternate benzenedicarboxylate(BDC) and 4-(2,6-di(pyrazin-2-yl)pyridin-4-yl)benzoate(L-) connectors, {[Cu(L)(BDC)(0.5)]·3.5 H2 O}n (1) and {[Zn(L)(BDC)(0.5)] ·H2 O}n (2), were solvothermally synthesized. Complex 1 is in triclinic system, space group P1 with a = 9.6456(14), b = 11.1160(16), c = 12.0414(18) A, α = 106.266(3), β = 92.277(3), γ =108.104(3)°, V = 1166.6(3) A3, Dc = 1.603 g·cm(-3), Mr = 563.00, Z = 2, F(000) = 578, μ = 0.996 mm(-1), the final R = 0.0575 and wR = 0.1386 for 3704 observed reflections with I &gt; 2σ(I). Complex 2 crystallizes in monoclinic, space group C2/c with a = 28.607(5), b = 8.9767(16), c = 19.705(4) ?, β = 125.396(3)°, V = 4125.0(13) ?3, Dc = 1.674 g·cm(-3), Mr = 519.79, Z = 8, F(000) = 2120, μ = 1.242 mm(-1), the final R = 0.0487 and w R = 0.0907 for 2944 observed reflections with I &gt; 2σ(I). Resulting from the narrower band gap and broader response to visible light, the CuII-chain exhibits better photocatalytic performance towards the degradation of rhodamine B and methylene blue than those of ZnII-chain. 展开更多
关键词 4-(2 6-di(pyrazin-2-yl)pyridin-4-yl)benzoate photocatalytic activity crystal structure coordination polymer
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2-羟基-4-(5,6-二硝基-1H-苯并[2,3-d]咪唑-2-基)苯甲酸甲酯的合成探索 被引量:3
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作者 张青龙 金宁人 +2 位作者 杨健 张清义 张建庭 《化工进展》 EI CAS CSCD 北大核心 2014年第3期744-748,757,共6页
以4,5-二硝基邻苯二胺和2-羟基对苯二甲酸单甲酯为起始原料,设计并成功采用一锅法合成出2-羟基-4-(5,6-二硝基-1H-苯并[2,3-d]咪唑-2-基)苯甲酸甲酯(MHDIB)。以50 mL二乙二醇二甲醚为溶剂,1.5 g的2-羟基对苯二甲酸单甲酯和2.5 g SOCl2... 以4,5-二硝基邻苯二胺和2-羟基对苯二甲酸单甲酯为起始原料,设计并成功采用一锅法合成出2-羟基-4-(5,6-二硝基-1H-苯并[2,3-d]咪唑-2-基)苯甲酸甲酯(MHDIB)。以50 mL二乙二醇二甲醚为溶剂,1.5 g的2-羟基对苯二甲酸单甲酯和2.5 g SOCl2在80℃反应2 h制2-羟基-4-氯羰基苯甲酸甲酯。室温下快速向反应体系中加入1.56 g 4,5-二硝基邻苯二胺,并于85℃反应1 h后加入3.52 g多聚磷酸,回流反应1 h后水析出粗产品,经乙醇重结晶得到纯度为93.67%的黄色针状产物,产率为17.82%。产物经IR、MS、1H NMR的准确定性和表征,作为AB型新单体的前体可应用于羟基改性PBI纤维即聚2-羟基-1,4-亚苯基-2,6-苯并[2,3-d:5',6'-d']二咪唑(H-PBI)的创新研究。 展开更多
关键词 2-羟基-4-(5 6-二硝基-1H-苯并2 3-d咪唑-2-基)苯甲酸甲酯 4 5-二硝基邻苯二胺 羟基改性PBI纤维 聚合 合成 纯化 methyl 2-hydrox yl-4-(5 6-dinitro-1H-benzo[2 3-d]imidazole-2-yl)benzoate(MHDIB)
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Two 2-(quinonylcarboxamino)benzoates from the lateral roots of Aconitum carmichaelii 被引量:14
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作者 Zhi-Bo Jiang Xian-Hua Meng +5 位作者 Bing-Ya Jiang Cheng-Gen Zhu Qing-Lan Guo Su-Juan Wang Sheng Lin Jian-Gong Shi 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第6期653-656,共4页
Two new 2-(quinonylcarboxamino)benzoates, named aconicarmiquinamides A (1) and B (2), were isolated from an aqueous extract of the lateral roots of Aconitum carmichaelii. Their structures were determined by spec... Two new 2-(quinonylcarboxamino)benzoates, named aconicarmiquinamides A (1) and B (2), were isolated from an aqueous extract of the lateral roots of Aconitum carmichaelii. Their structures were determined by spectroscopic data analysis, and confirmed by comparison with synthetic methyl 3.6- bis( diethylamino )benzoqunonylcarboxylate (3). 展开更多
关键词 Aconitum carmichaelii Ranunculaceae 2-(Quinonylcarboxamino)benzoates Aconicarmiquinamides A and B Methyl 3 6-his( diethylamino) benzoqunonylcarboxylateStructure elucidation
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广陈皮及其近缘品种挥发油成分的比较 被引量:33
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作者 欧小群 王瑾 +3 位作者 李鹏 黄勤挽 杨秀梅 谭茂兰 《中成药》 CAS CSCD 北大核心 2015年第2期364-370,共7页
目的比较分析广陈皮及其近缘品种鲜果皮挥发油成分并寻找其特征成分。方法收集包括广陈皮(茶枝柑)、陈皮(红橘)和金橘等11种品种鲜果皮,水蒸气蒸馏法提取挥发油,用GC-MS技术分离鉴定挥发油的成分,对所有样品测定结果进行聚类分析。结果... 目的比较分析广陈皮及其近缘品种鲜果皮挥发油成分并寻找其特征成分。方法收集包括广陈皮(茶枝柑)、陈皮(红橘)和金橘等11种品种鲜果皮,水蒸气蒸馏法提取挥发油,用GC-MS技术分离鉴定挥发油的成分,对所有样品测定结果进行聚类分析。结果所测鲜果皮挥发油均以柠檬烯为主要成分,同时含萜品烯、异松油烯和芳樟醇萜烯烃类化合物。聚类分析结果与鲜果皮品种分类结果一致。结论与其他陈皮近缘品种果皮比较,广陈皮(茶枝柑)挥发油中含有特有成分2-甲氨基-苯甲酸甲酯,柠檬烯的相对含有量最低,而萜品烯相对含有量最高,可作为广东新会陈皮的鉴定依据。 展开更多
关键词 广陈皮(茶枝柑) 陈皮(红橘) 金橘 挥发油 GC-MS 2-甲氨基苯-甲酸甲酯 聚类分析
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水合肼还原制备3-氨基-2-[(2'-氰基联苯-4-基)甲基]氨基-苯甲酸乙酯的工艺研究
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作者 王堃 杨俊玲 +3 位作者 张晓军 韩学文 高立国 范巧云 《现代药物与临床》 CAS 2012年第6期555-557,共3页
目的研究3-氨基-2-[(2'-氰基联苯-4-基)甲基]氨基-苯甲酸乙酯的最优合成工艺。方法以2-[(2'-氰基联苯-4-基)-甲基]氨基-3-硝基苯甲酸乙酯为原料,水合肼为还原剂,Pb/C为催化剂,还原制得。结果原料与还原剂的最佳物质的量比为1.92... 目的研究3-氨基-2-[(2'-氰基联苯-4-基)甲基]氨基-苯甲酸乙酯的最优合成工艺。方法以2-[(2'-氰基联苯-4-基)-甲基]氨基-3-硝基苯甲酸乙酯为原料,水合肼为还原剂,Pb/C为催化剂,还原制得。结果原料与还原剂的最佳物质的量比为1.92:1,催化剂Pd/C为1.2g,反应温度为75℃,反应时间2h的最优条件下,收率为92.0%。结论本合成工艺稳定,条件温和,产率高,适合3-氨基-2-[(2'-氰基联苯-4-基)甲基]氨基-苯甲酸乙酯的工业化生产。 展开更多
关键词 3-氨基-2-[(2'-氰基联苯-4-基)甲基]氨基-苯甲酸乙酯 水合肼 PB C 还原
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《中国药典》2020版陈皮质量标准修订的研究 被引量:13
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作者 梁奕尧 陈柏忠 +5 位作者 杨玉华 巢颖欣 刘梦诗 王康慧 植美明 郑国栋 《中国医院药学杂志》 CAS 北大核心 2022年第2期142-146,共5页
目的:针对《中国药典》2020版陈皮质量标准的修订提出两点建议,以突出"陈皮"与"广陈皮"的共性特征与个性差异,完善陈皮质量标准。方法:采用TLC三步展开法,以橙皮苷、川陈皮素和2-甲氨基-苯甲酸甲酯为对照,鉴别并区... 目的:针对《中国药典》2020版陈皮质量标准的修订提出两点建议,以突出"陈皮"与"广陈皮"的共性特征与个性差异,完善陈皮质量标准。方法:采用TLC三步展开法,以橙皮苷、川陈皮素和2-甲氨基-苯甲酸甲酯为对照,鉴别并区分"陈皮"与"广陈皮";同时采用HPLC法对橙皮苷、川陈皮素、橘皮素等5种黄酮成分进行含量测定,并对川陈皮素与橘皮素进行相关性分析。结果:TLC鉴别结果表明橙皮苷与川陈皮素是"陈皮"与"广陈皮"的共有成分,而2-甲氨基-苯甲酸甲酯仅在"广陈皮"中发现,可作为区分二者的特征成分;HPLC测定结果显示橙皮苷,川陈皮素和橘皮素是二者的主要活性成分,同时川陈皮素与橘皮素含量具有良好的正相关性,且以川陈皮素为高,故可考虑以橙皮苷与川陈皮素作为测定指标。结论:结合本研究结果,对《中国药典》2020版陈皮质量标准的修订提出两点建议:一是在TLC鉴别项下以橙皮苷、川陈皮素和2-甲氨基-苯甲酸甲酯为"陈皮"与"广陈皮"的鉴别对照,二是在含量测定项下以橙皮苷与川陈皮素为二者的测定指标。该实验方法具有很好的耐用性和专属性,可有效体现二者的共性特征与个性差异,为陈皮质量的有效控制提供合理参考。 展开更多
关键词 陈皮 广陈皮 橙皮苷 川陈皮素 橘皮素 2-甲氨基-苯甲酸甲酯
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Synthesis and characterization of poly(p-dioxanone)-based degradable copolymers with enhanced thermal and hydrolytic stabilities
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作者 Yi-Teng Yan Gang Wu +1 位作者 Si-Chong Chen Yu-Zhong Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第4期2151-2154,共4页
Herein, we presented a novel biodegradable copolymer via the chain extending reaction of poly(pdioxanone)-co-poly(2-(2-hydroxyethoxy) benzoate)(PPDO-co-PDHB) prepolymer with hexamethylene diisocyanate(HDI) as a chain ... Herein, we presented a novel biodegradable copolymer via the chain extending reaction of poly(pdioxanone)-co-poly(2-(2-hydroxyethoxy) benzoate)(PPDO-co-PDHB) prepolymer with hexamethylene diisocyanate(HDI) as a chain extender. The structures and molecular weight of PPDO-co-PDHB prepolymer and PPDO-co-PDHB-PU chain-extended copolymer are characterized via hydrogen nuclear magnetic resonance spectroscopy(1 H NMR) and viscosity test. The relationship between the molecular structures and properties of the chain-extended copolymers is established. The PPDO-co-PDHB-PU copolymers possess a better thermal stability comparing with the PPDO homopolymer. The study of mechanical properties shows that the elongation-at-break of PPDO-co-PDHB-PU is much higher than that of PPDO. The investigation of hydrolytic degradation behaviors indicates the degradation rate of PPDO can be controlled by adjusting the PDHB compositions, and proves that chain-extended copolymers exhibit an excellent hydrolytic stability being better than that of PPDO. 展开更多
关键词 Poly(p-dioxanone) Poly(2-(2-hydroxyethoxy)benzoate) Tunable properties Chain extending Controlled degradation
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