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对氟间苯氧基甲苯的合成 被引量:2
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作者 赵文献 王德坤 周艳丽 《精细化工》 EI CAS CSCD 北大核心 2004年第5期395-397,共3页
研究和优化了以3 溴 4 氟甲苯(Ⅲ)和苯酚(Ⅰ)为原料,经Ullmann偶联缩合反应合成对氟间苯氧基甲苯(Ⅳ)的方法。最佳实验条件是x(CuO)=15%为催化剂,n〔苯酚钠(Ⅱ)〕∶n(Ⅲ)=3∶1,DMA作溶剂,在160~165℃反应5h,Ⅳ的产率可达88%,气相色谱纯... 研究和优化了以3 溴 4 氟甲苯(Ⅲ)和苯酚(Ⅰ)为原料,经Ullmann偶联缩合反应合成对氟间苯氧基甲苯(Ⅳ)的方法。最佳实验条件是x(CuO)=15%为催化剂,n〔苯酚钠(Ⅱ)〕∶n(Ⅲ)=3∶1,DMA作溶剂,在160~165℃反应5h,Ⅳ的产率可达88%,气相色谱纯度w(Ⅳ)=98 2%。Ⅳ的结构经1HNMR,IR,元素分析和ESI-MS证实。 展开更多
关键词 对氟间苯氧基甲苯 拟除虫菊酯 催化偶联反应
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间苯氧基甲苯合成工艺研究
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作者 路春娥 张征林 丁莲霞 《精细石油化工》 CAS CSCD 北大核心 1999年第3期27-29,共3页
对常压下合成间苯氧基甲苯的方法进行改进并应用于工业化。通过改变催化剂、脱水方式、投料方式、反应时间和温度等一系列反应条件,探索其对合成的影响,得到产率可达90%的最佳反应条件。
关键词 苯氧基甲苯 缩合 合成 工艺 杀虫剂 中间体
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间苯氧基甲苯生产废水和废渣的综合利用
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作者 陈雷雷 《化工环保》 CAS CSCD 北大核心 1994年第2期92-95,共4页
对间苯氧基甲苯生产废水和废渣的处理及回收工艺作了介绍。废渣中各组分经分离后全部回收利用;废水经二级萃取脱酚处理后用于普钙生产,回收了有用物质,可取得明显的经济效益和环境效益。
关键词 苯氧基甲苯 废水 废渣 综合利用
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间苯氧基甲苯及其衍生物生产方法
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作者 应柏春 《宁波化工》 1995年第2期30-33,共4页
间苯氧基苯甲醛(简称醚醛)和间苯氧基苯甲醇(简称醚醇)是间苯氧基甲苯的重要衍生物。间苯氧基甲苯、醚醛和醚醇均为拟除虫菊酯类农药的重要中间体。醚醛是世界上产量最大的拟除虫菊酯品种溴氰菊醋、氰戊菊酯、
关键词 苯氧基甲苯 苯氧基甲醛 拟除虫菊酯 中间体
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间-苯氧基甲苯的合成 被引量:1
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作者 骆诗宏 唐崇恭 《化学通报》 CAS CSCD 北大核心 1989年第8期36-38,共3页
合成拟除虫菊酯是近年来最引入注目的一类杀虫剂,间苯氧基甲苯是合成除虫菊酯的一个重要中间体,其合成方法的研究和生产工艺流程的改进是一个十分重要的课题。最近十年来,关于间苯氧基甲苯的合成方法曾有过一些专利报道。
关键词 苯氧基甲苯 合成 除虫菊酯 杀虫剂 中间体
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2,5-双(2-三氟甲基-4-氨基苯氧基)甲苯及其聚酰亚胺薄膜的合成与性能研究 被引量:3
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作者 赵世图 鲁云华 +1 位作者 赵洪斌 胡知之 《绝缘材料》 CAS 北大核心 2013年第3期56-59,共4页
用甲基氢醌和2-氯-5-硝基三氟甲苯通过亲核取代及还原反应合成出了一种二胺单体2,5-双(2-三氟甲基-4-氨基苯氧基)甲苯(DATHQ-2TF),采用该二胺单体和1,4-双(4-氨基-2-三氟甲基苯氧基)苯(6FAPB)分别与1,2,3,4-环丁烷四甲酸二酐(CBDA)反应... 用甲基氢醌和2-氯-5-硝基三氟甲苯通过亲核取代及还原反应合成出了一种二胺单体2,5-双(2-三氟甲基-4-氨基苯氧基)甲苯(DATHQ-2TF),采用该二胺单体和1,4-双(4-氨基-2-三氟甲基苯氧基)苯(6FAPB)分别与1,2,3,4-环丁烷四甲酸二酐(CBDA)反应制得聚酰胺酸(PAA),再经过热酰亚胺化制备出了聚酰亚胺薄膜PI-1和PI-2,并对其结构和性能进行研究。结果表明:两种薄膜均具有非常好的综合性能,薄膜在450 nm处的透光率都在80%以上,5%热分解温度均超过430℃,且都具有良好的溶解性能。由于甲基的引入使得PI-1薄膜比PI-2薄膜具有更好的溶解性,但光学透明性和热性能稍有下降。 展开更多
关键词 2 5-双(2-三氟甲基-4-氨基苯氧基)甲苯 聚酰亚胺 透明 可溶 性能
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对氟间苯氧基苯甲醛的合成
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作者 赵文献 王敏灿 +4 位作者 刘澜涛 华远照 周艳丽 王德坤 宋毛平 《精细化工》 EI CAS CSCD 北大核心 2005年第9期696-698,704,共4页
研究和优化了以4-氟-3-苯氧基甲苯(Ⅳ)为起始原料,经氯化反应,氧化反应合成对氟间苯氧基苯甲醛(Ⅶ)的方法.考察了催化剂用量,不同溶剂对氯化反应产物收率的影响和反应物配比对氧化水解反应产物收率的影响.氯化反应的最佳反应条件是选择C... 研究和优化了以4-氟-3-苯氧基甲苯(Ⅳ)为起始原料,经氯化反应,氧化反应合成对氟间苯氧基苯甲醛(Ⅶ)的方法.考察了催化剂用量,不同溶剂对氯化反应产物收率的影响和反应物配比对氧化水解反应产物收率的影响.氯化反应的最佳反应条件是选择CCl4作溶剂,在72~76 ℃下通氯气回流反应4 h.催化剂为x(过氧化二苯甲酰)=4.1%(相对于Ⅳ);中间产品α-氯-4-氟-3-苯氧基甲苯(Ⅴ)和α,α-二氯-4-氟-3-苯氧基甲苯(Ⅵ)的氧化水解反应的最佳反应条件是n(Ⅴ+Ⅵ):n[(CH2)6N4]=1:4;w(HAc)=50%的冰醋酸水溶液作溶剂,在104~108 ℃下反应4 h.氯化、水解联合总收率可达86.8%,气相色谱纯度w(Ⅶ)=98.3%.Ⅶ的结构经1HNMR,13CNMR,IR,元素分析和ESI-MS证实. 展开更多
关键词 对氟间苯氧基甲苯 对氟间苯氧基苯甲醛 氯化 Sommelet反应 氟氯氰菊酯
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3-苯氧基苯甲醛的合成工艺 被引量:2
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作者 田中玉 左识之 虞心红 《华东理工大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第1期94-96,共3页
以3-苯氧基甲苯为原料,在紫外光照射下进行侧链氯化转化成3-苯氧基-α,α-二氯甲基苯,经硫酸-醋酸水解得高纯度的3-苯氧基苯甲醛,总收率80%~85%。
关键词 苯氧基甲苯 二氯甲基苯 苯氧基苯甲醛 合成 工艺
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Optimization of technological conditions for one-pot synthesis of (S)-α-cyano-3-phenoxybenzyl acetate in organic media 被引量:1
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作者 章亭洲 杨立荣 朱自强 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE EI CAS CSCD 2005年第3期175-181,共7页
Optically active form of α-cyano-3-phenoxybenzyl (CPB) alcohol, building block of pyrethroid insecticides, was synthesized as its acetate by the combination of anion-exchange resin (D301)-catalyzed transcyanation bet... Optically active form of α-cyano-3-phenoxybenzyl (CPB) alcohol, building block of pyrethroid insecticides, was synthesized as its acetate by the combination of anion-exchange resin (D301)-catalyzed transcyanation between m-phenoxybenzaldehyde (m-PBA) and acetone cyanohydrin (AC), and lipase (from Alcaligenes sp.)-catalyzed enantioselective transesterification of the resulting cyanohydrin with vinyl acetate. Through optimizing technological conditions, the catalyzing efficiency was improved considerably compared to methods previously reported. Concentrations of CPB acetate were determined by gas chromatograph. The enantio excess (e.e.) values of CPB acetate were measured by NMR (nuclear magnetic resonance) method. Effects of solvents and temperatures on this reaction were studied. Cyclohexane was shown to be the best solvent among the three tested solvents. 55 °C was the optimal temperature for higher degree of conversion. External diffusion limitation was excluded by raising the rotational speed to 220 r/min. However, internal diffusion could not be ignored, since the catalyst (lipase) was an immobilized enzyme and its particle dimension was not made small enough. The reaction rate was substantially accelerated when the reactant (m-PBA) concentration was as high as 249 mmol/L, but decreased when the initial concentration of m-PBA reached to 277 mmol/L. It was also found that the catalyzing capability of recovered lipase was high enough to use several batches. Study of the mole ratio of AC to m-PBA showed that 2:1 was the best choice. The strategy of adding base catalyst D301 was found to be an important factor in improving the degree of conversion of the reaction from 20% to 80%. The highest degree of conversion of the reaction has reached up to 80%. 展开更多
关键词 Biosynthesis α-cyano-3-phenoxybenzyl (CPB) acetate LIPASE OPTIMIZATION Organic media
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STUDY ON THE TREATMENT OF 3—PHENOXY—BENZALDEHYDE INDUSTRIAL WASTEWATER WITH POLYMERIC ADSORBENT 被引量:5
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作者 ZhuShiyun ChenJinlong +2 位作者 Lu Xiaoxiang Zhang Quanxing Wang Liansheng 《Chinese Journal of Reactive Polymers》 1998年第2期22-31,共10页
In this paper the two effluents from PBA (3- phenoxy -benzaldehyde) productionprocess were treated by polymeric adsorbent CHA-lll. PBA or PBC(3-phenoxybenzoic acid) was recovered from the wastewater in the process of ... In this paper the two effluents from PBA (3- phenoxy -benzaldehyde) productionprocess were treated by polymeric adsorbent CHA-lll. PBA or PBC(3-phenoxybenzoic acid) was recovered from the wastewater in the process of neutralization. As asecondary treatment method, adsorption with CHA-lll showed better efficency thanPhotocatalytic decomposition and solvent extraction. The optimal technologicalparameters were: adsorption: current velocity: 2.0 BV/hr(bed volume per hour), roomtemperature, desorption: current velocity:10 BV/hr 80℃8% sodium hydroxideaqueous solutions. In conclusion, 90.9% COD in the neutralizing wastewater and98. 4% COD in the hydrolysis wastewater are removed successfully. 展开更多
关键词 wastewater treatment polymeric adsorbent 3-phenoxy benzaldehyde
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Synthesis and protein tyrosine phosphatase 1B inhibition activities of two new synthetic bromophenols and their methoxy derivatives 被引量:1
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作者 崔永超 史大永 胡志强 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2011年第6期1237-1242,共6页
3-bromo-4,5-bis(2,3-dibromo-4,5-dihydroxybenzyl)-l,2-benzenediol (1) is a natural bromophenol isolated from the red algae Rhodomela confervoides that exhibits significant inhibition against protein tyrosine phosph... 3-bromo-4,5-bis(2,3-dibromo-4,5-dihydroxybenzyl)-l,2-benzenediol (1) is a natural bromophenol isolated from the red algae Rhodomela confervoides that exhibits significant inhibition against protein tyrosine phosphatase 1B (PTP1B). Based on its activity, we synthesized two new synthetic bromophenols and their methoxy derivatives from vanillin using the structure of natural bromophenol 1 as a scaffold. The structures of these bromophenols were elucidated from H NMR, 13C NMR, and high resolution electron ionization mass spectrometry as 2,3-dibromo-1-(2'-bromo-6'-(3",4"-dimethoxybenzyl)- 3 ',4 '-dimethoxybenzyl)-4,5 -dimethoxybenzene (2), 2,3-dibromo- 1 -(2 '-bromo-6'-(2 "-bromo-4",5 "-dimethoxy- benzyl)-3',4'-dimethoxybenzyl)-4,5-dimethoxybenzene (3), 3,4-dibromo-5-(2'-bromo-6'-(2"-bromo-4",5"- dihydroxybenzyl)-3',4'-dihydroxybenzyl)pyrocatechol (4) and 3,4-dibromo-5-(2'-bromo-6'-(3",4"- dihydroxybenzyl)-3',4'-dihydroxybenzyl)pyrocatechol (5). PTP1B inhibition activities of these compounds were evaluated using a colorimetric assay, and compounds 3 and 4 demonstrated interesting activity against PTP1B. 展开更多
关键词 protein tyrosine phosphatase 1B inhibition bromophenol derivatives SYNTHESIS
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Fuzzy Support Vector Regression Model of 4-CBA Concentration for Industrial PTA Oxidation Process 被引量:3
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作者 张英 苏宏业 +1 位作者 刘瑞兰 褚健 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2005年第5期642-648,共7页
In the past few years, support vector machines (SVMs) have been applied to many fields, such as pattern recognition and data mining, etc. However there still exist some problems to be solved. One of them is that the S... In the past few years, support vector machines (SVMs) have been applied to many fields, such as pattern recognition and data mining, etc. However there still exist some problems to be solved. One of them is that the SVM is very sensitive to outliers or noises because of over-fitting problem. In this paper, a fuzzy support vector regression (FSVR) method is presented to deal with this problem. Strategies based on k nearest neighbor (kNN) and support vector data description (SVDD) are adopted to set the fuzzy membership values of data points in FSVR.The proposed FSVR soft sensor models based on kNN and SVDD are employed to predict the concentration of 4-carboxy-benzaldehyde (4-CBA) in purified terephthalic acid (PTA) oxidation process. Simulation results indicate that the proposed method indeed reduces the effect of outliers and yields higher accuracy. 展开更多
关键词 purified terephthalic acid 4-carboxy-benzaldehyde support vector machines soft sensor fuzzy membership
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Exclusively catalytic oxidation of toluene to benzaldehyde in an O/W emulsion stabilized by hexadecylphosphate acid terminated mixed-oxide nanoparticles 被引量:4
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作者 Changshun Deng Mengxia Xu +7 位作者 Zhen Dong Lei Li Jinyue Yang Xuefeng Guo Luming Peng Nianhua Xue Yan Zhu Weiping Ding 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第2期341-349,共9页
A series of hexadecylphosphate acid(HDPA) terminated mixed-oxide nanoparticles have been investigated to catalyze the oxidation of toluene exclusive to benzaldehyde under mild conditions in an emulsion of toluene/wate... A series of hexadecylphosphate acid(HDPA) terminated mixed-oxide nanoparticles have been investigated to catalyze the oxidation of toluene exclusive to benzaldehyde under mild conditions in an emulsion of toluene/water with the catalysts as stabilizers. With the HDPA-Fe2 O3/Al2 O3 as the basic catalyst, a series of transition metals, such as Mn, Co, Ni, Cu, Cr, Mo, V, and Ti, was respectively doped to the basic catalyst to modify the performance of the catalytic system, in expectation of influencing the mobility of the lattice oxygen species in the oxide catalysts. Under normally working conditions of the catalytic system, the nanoparticles of catalysts located themselves at the interface between the oil and water phases, constituting the Pickering emulsion. Both the doped iron oxide and its surface adsorbed hexadecylphosphate molecules were essential to the catalytic system for excellent performances with high toluene conversions as well as the exclusive selectivity to benzaldehyde. Under optimal conditions, ~83% of toluene conversion and >99% selectivity to benzaldehyde were obtained, using molecular oxygen as oxidant and HDPA-(Fe2 O3-Ni O)/Al2 O3 as the catalyst. This process is green and low cost to produce high quality benzaldehyde from O2 oxidation of toluene. 展开更多
关键词 Toluene oxidation BENZALDEHYDE Hexadecylphosphate acid Molecular oxygen PICKERING
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Vapor phase methylation of phenol on Fe-substituted ZrO_2 catalyst 被引量:3
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作者 Celia F.Braganza A.V.Salker 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第11期1991-1996,共6页
Fe-doped ZrO2 compounds were prepared by a co-precipitation method.The compounds were characterized by X-ray diffraction,N2 adsorption-desorption,ultraviolet diffuse reflectance infrared Fourier transform spectroscopy... Fe-doped ZrO2 compounds were prepared by a co-precipitation method.The compounds were characterized by X-ray diffraction,N2 adsorption-desorption,ultraviolet diffuse reflectance infrared Fourier transform spectroscopy,scanning electron microscopy-energy-dispersive X-ray spectroscopy,transmission electron microscopy,NH3 temperature-programmed desorption,X-ray photoelectron spectroscopy,and in situ Fourier transform infrared spectroscopy.The incorporation of Fe into ZrO2 lattice favored and effectively stabilized the formation of purely ZrO2 tetragonal phase.Subsequently,the catalytic activity of the Fe-doped ZrO2 compounds was evaluated toward vapor phase methylation of phenol.The catalytic activity was governed by Fe content and related to the Lewis acidity of the prepared catalyst. 展开更多
关键词 ZIRCONIA Iron doped METHYLATION Phenol Xylenol
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Enzyme‐like mechanism of selective toluene oxidation to benzaldehyde over organophosphoric acid‐bonded nano‐oxides 被引量:1
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作者 Changshun Deng Yun Cui +5 位作者 Junchao Chen Teng Chen Xuefeng Guo Weijie Ji Luming Peng Weiping Ding 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第9期1509-1518,共10页
The completely selective oxidation of toluene to benzaldehyde with dioxygen,without the need touse H_(2)O_(2),halogens,or any radical initiators,is a reaction long desired but never previously successful.Here,we demon... The completely selective oxidation of toluene to benzaldehyde with dioxygen,without the need touse H_(2)O_(2),halogens,or any radical initiators,is a reaction long desired but never previously successful.Here,we demonstrate the enzyme‐like mechanism of the reaction over hexadecylphosphateacid(HDPA)‐bonded nano‐oxides,which appear to interact with toluene through specific recognition.The active sites of the catalyst are related to the ability of HDPA to change its bonding to theoxides between monodentate and bidentate during the reaction cycle.This greatly enhances themobility of the crystal oxygen or the reactivity of the catalyst,specifically in toluene transformations.The catalytic cycle of the catalyst is similar to that of methane monooxygenase.In thepresence of catalyst and through O_(2)oxidation,the conversion of toluene to benzaldehyde is initiatedat 70°C.We envision that this novel mechanism reveals alternatives for an attractive route to designhigh‐performance catalysts with bioinspired structures. 展开更多
关键词 Selective oxidation Toluene BENZALDEHYDE Hexadecylphosphate acid Enzyme‐like MECHANISM
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Syntheses and Crystal Structures of 4,4′Diformyl-diphenoxyethane and 4,4′4′′-Triformyl-triphenoxytriethylamine 被引量:3
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作者 马震 刘世雄 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2002年第5期533-537,共5页
Two title compounds, 4,4?diformyl-diphenoxyethane (compound 1, C16H14O4) and 4,4?4创-triformyl-triphenoxytriethylamine (compound 2, C27H27NO6), were synthesized by condensation of 4-hydroxybenzaldehyde with 1,2-dichlo... Two title compounds, 4,4?diformyl-diphenoxyethane (compound 1, C16H14O4) and 4,4?4创-triformyl-triphenoxytriethylamine (compound 2, C27H27NO6), were synthesized by condensation of 4-hydroxybenzaldehyde with 1,2-dichloroethane and tris(2-chloroethyl)amine, respectively in dimethyl formamide in the presence of anhydrous potassium carbonate. The crystal data are: monoclinic, P21/c, a = 7.571(2), b = 12.608(3), c = 7.357(2) ? b = 105.823(6)? V = 675.7(2) 3, Mr = 270.3, Z = 2, Dc = 1.328 g/cm3, F(000) = 284, m(MoKa) = 0.096 mm-1, R = 0.0537 and wR = 0.2189 for compound 1; and monoclinic, P21/n, a = 11.7162(6), b = 9.0042(6), c = 22.908(2) ? b = 99.505(1)? V = 2383.5(3) ?, Mr = 461.50, Z = 4, Dc = 1.286 g/cm3, F(000)= 976, m(MoKa) = 0.091 mm-1, R = 0.0464 and wR = 0.1462 for compound 2. The molecule of compound 1 (dialdehyde) is located at the crystallographic inversion center nearby the midpoint of C(8)C(8A) single bond. The three chains in the molecule of compound 2 (trialdehyde) are of non-crystallographic pseudo-C3 symmetry, and each of them is quite planar. 展开更多
关键词 crystal structure DIALDEHYDE trialdehyde
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NON-ISOTHERMAL KINETICS OF THERMAL DECOMPOSITION OF A NOVEL ANTITUMOR AGENT 4-{5-[3,4-DIMETHYL-5-(3,4,5-TRIMETHOXYPHENYL) THIOPHEN-2-YL ] -2-METHOXYPHENYL} MORPHOLINE
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作者 雷英杰 石继仙 俞玫 《Transactions of Tianjin University》 EI CAS 2006年第1期46-49,共4页
The thermal decomposition of a new antitumor agent, 4-{5-[ 3,4-dimethyl-5-(3,4,5-trimethoxyphenyl)thiophen-2-yl ]-2-methoxyphenyl} morpholine was studied by Differential Scanning Calorimetry (DSC) and Thermogravim... The thermal decomposition of a new antitumor agent, 4-{5-[ 3,4-dimethyl-5-(3,4,5-trimethoxyphenyl)thiophen-2-yl ]-2-methoxyphenyl} morpholine was studied by Differential Scanning Calorimetry (DSC) and Thermogravimetry (TG) / Derivative Thermogravimetry ( DTG ) methods at a flow rate of nitrogen gas of 120 mL/min, The kinetic parameters were obtained from the analysis of the corresponding curves by Kissinger's method, Ozawa's method and the integral method, The results indicate that the apparent activation energy and pre-exponential constants of the decomposition reaction are 106.67 kJ/mol and 10^6.19s^-1, respectively. 展开更多
关键词 4-{5-[3 4-Dimethyl-5-(3 4 5-Trimethoxyphenyl)Thiophen-2-yl]-2-Methoxyphenyl}morpholine thermal decomposition kinetics
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Effect of CO2 on oxidation of p-xylene in acetic acids/CO2
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作者 HUANG Kan CHEN Jie ZHAO Ling 《Journal of Chemistry and Chemical Engineering》 2009年第4期44-47,共4页
The oxidation of p-xylene to terephthalic acid with molecular oxygen in acetic acids modified carbon dioxide over Co/Mn/Br catalyst was studied in a batch reactor. The results showed that the oxidation of p-xylene to ... The oxidation of p-xylene to terephthalic acid with molecular oxygen in acetic acids modified carbon dioxide over Co/Mn/Br catalyst was studied in a batch reactor. The results showed that the oxidation of p-xylene to terephthalic acid was severely inhibited when carbon dioxide exceeded a certain amount, the conversion of p-xylene decreased rapidly from 100.0% to 3.3% and the yield of terephthalic acid dropped from 42.6% to trace. Whereas the oxidation processes of p-Tolualdchyde to p-Toluic acid and 4-Carboxybenzaldehyde to tcrcphthalic acid were improved when a relative small amount of CO2 v/as added, Further investigation found that this negative effect may be caused by multiphase reactions emerging. 展开更多
关键词 catalytic oxidation P-XYLENE acetic acid carbon dioxide negative effect
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Preparation, Characterization and Biological Activity Studies of New Azo Compounds
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作者 Mouayad. N. Mohammed 《Journal of Chemistry and Chemical Engineering》 2012年第10期885-888,共4页
A new series of azo were derived from 2,5-di(p-amino phenyl)-3,6-diphenyl pyrazine in the presence of benzoic acid, salicylic acid, p-amino salicylic acid, p-methoxy phenol and pmethyl phenol. The structures of the ... A new series of azo were derived from 2,5-di(p-amino phenyl)-3,6-diphenyl pyrazine in the presence of benzoic acid, salicylic acid, p-amino salicylic acid, p-methoxy phenol and pmethyl phenol. The structures of the synthesized compounds were determined on the basis of their FTIR, UV (ultraviolet), elemental analysis and H-NMR (H-nuclear magnetic resonance) spectral date. The purity of synthesized compounds was checked by performing TLC (thin layer chromatography). The antibacterial activity was evaluated in DMSO (dimethyl sulfoxide). 展开更多
关键词 PYRAZINE benzoic acid salicylic acid p-amino salicylic acid p-methoxy phenol p-methyl phenol.
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Synthesis and Crystal Structure of 3-(2-Hydroxy-phenyl)-5-(2-methyl-phenyl)-6-thoxycarbonyl-cyclohexen-2-one
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作者 刘胜利 戴静芳 +1 位作者 陈勇 刘汉文 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2005年第3期324-328,共5页
Hydroxy-phenyl)-5-(2-methyl-phenyl)-6-ethoxycarbonyl-cyclohexen-2-one has been synthesized and characterized by elemental analysis, IR, UV, H NMR and MS, and its crystal 1 structure was determined by X-ray single-crys... Hydroxy-phenyl)-5-(2-methyl-phenyl)-6-ethoxycarbonyl-cyclohexen-2-one has been synthesized and characterized by elemental analysis, IR, UV, H NMR and MS, and its crystal 1 structure was determined by X-ray single-crystal diffraction method. The crystal belongs to the monoclinic system, space group P21/c with a = 14.6298(13), b = 5.8623(5), c = 22.255(2) ?, β = 105.855(2)o, V = 1836.0(3) ?3, Mr = 350.40, Z = 4, Dc = 1.268 g/cm3, F(000) = 744, μ(MoKα) = 0.086 mm-1, R = 0.0680 and wR = 0.1498. The crystal analysis results show that the cyclohexene unit of the title compound has a quasi-chair conformation, and a centrosymmetric dimer with a 16-membered ring is produced by the intermolecular hydrogen bonds. 展开更多
关键词 hydroxy-phenyl)-5-phenyl-6-ethoxycarbonyl-cyclohex-2-enone crystal structure hydrogen bond synthesis UV spectrum
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