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排序方式: 共有49条查询结果,搜索用时 15 毫秒
1.
报道了无机载体试剂KF/Al2O3催化邻苯二甲酰亚胺的N-苄基化,研究了反应体系中各反应因素对产率的影响.其优化反应条件为:在N,N-二甲基甲酰胺(DMF)溶剂中,邻苯二甲酰亚胺和溴化苄的摩尔比为1:1.2,90℃反应6h,产率达92.5%.  相似文献   
2.
对邻苯二甲酰亚胺(PIMD)的合成进行了研究.在密闭环境中通过回收并循环使用反应蒸出液合成邻苯二甲酰亚胺,产率达到97.5 %,最佳工艺条件为:物料比为n(苯酐):n(氨水)=1:1.3,反应温度为240 ℃,反应时间为60min.并用熔点法、红外光谱和元素分析进行了产品定性.  相似文献   
3.
以乙醇胺为原料合成N-甲基乙二胺,采用新方法将其N-邻苯二甲酰化合成N-(2-甲胺基乙基)邻苯二甲酰亚胺,用于胺基保护以提高N-甲基乙二胺在亲核反应中的选择性,总收率32.5%。  相似文献   
4.
Isoindoline-1,3-dione derivatives constitute an important group of medicinal substances. In this study, nine new 1H-isoindole-1,3(2H)-dione derivatives and five potential pharmacophores were obtained in good yield (47.24–92.91%). The structure of the new imides was confirmed by the methods of elemental and spectral analysis: FT–IR, H NMR, and MS. Based on the obtained results of ESI–MS the probable path of the molecules decay and the hypothetical structure of the resulting pseudo-molecular ions have been proposed. The physicochemical properties of the new phthalimides were determined on the basis of Lipiński’s rule. The biological properties were determined in terms of their cyclooxygenase (COX) inhibitory activity. Three compounds showed greater inhibition of COX-2, three compounds inhibited COX-1 more strongly than the reference compound meloxicam. From the obtained results, the affinity ratio COX-2/COX-1 was calculated. Two compounds had a value greater than that of meloxicam. All tested compounds showed oxidative or nitrosan stress (ROS and RNS) scavenging activity. The degree of chromatin relaxation outside the cell nucleus was lower than the control after incubation with all test compounds. The newly synthesized phthalimide derivatives showed no cytotoxic activity in the concentration range studied (10–90 µM). A molecular docking study was used to determined interactions inside the active site of cyclooxygenases.  相似文献   
5.
Novel bisphenol monomers ( 1a‐d ) containing phthalimide groups were synthesized by the reaction of phenolphthalein with ammonia, methylamine, aniline, and 4‐tert‐butylanilne, respectively. A series of cardo poly(arylene ether sulfone)s was synthesized via aromatic nucleophilic substitution of 1a‐d with dichlorodiphenylsulfone, and characterized in terms of thermal, mechanical and gas transport properties to H2, O2, N2, and CO2. The polymers showed high glass transition temperature in the range 230–296°C, good solubility in polar solvents as well as excellent thermal stability with 5% weight loss above 410°C. The most permeable membrane studied showed permeability coefficients of 1.78 barrers to O2 and 13.80 barrers to CO2, with ideal selectivity factors of 4.24 for O2/N2 pair and 28.75 for CO2/CH4 pair. Furthermore, the structure–property relationship among these cardo poly(arylene ether sulfone)s had been discussed on solubility, thermal stability, mechanical, and gas permeation properties. The results indicated that introducing 4‐tert‐butylphenyl group improved the gas permeability of polymers evidently. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007  相似文献   
6.
对 3个系列 ,2 0个邻苯二甲酰亚胺衍生物的紫外光谱进行了测定和分析 ,发现了其中的取代基效应 ,并对该结果进行了理论解释。  相似文献   
7.
在微波辐射下,邻苯二甲酸酐和乙醇胺反应可直接合成N-(2-羟乙基)-邻苯二甲酰亚胺。最佳条件为:辐射功率为259W,辐射时间为6min,邻苯二甲酸酐与乙醇胺的物质的量比为1:1.05,产率可达87.1%。  相似文献   
8.
探索了苯酐与尿素反应生产邻苯二甲酰亚胺的新工艺并试验出反应的最佳工艺条件  相似文献   
9.
N-(4-溴丁基)邻苯二甲酰亚胺的合成   总被引:5,自引:0,他引:5  
匡永清  张生勇  蔚琳琳 《化学试剂》2001,23(6):359-359,361
室温下用氢氧化钾将邻苯二甲酰亚胺转化为钾盐,然后使其与1,4-二溴丁烷在丙酮中回流反应,制得N-(4-溴丁基)邻苯二甲酰亚胺,产率达90%。  相似文献   
10.
盖布瑞尔合成法制备N-(2-羟乙基)-邻苯二甲酰亚胺   总被引:3,自引:1,他引:2  
报道了通过盖布瑞尔合成法制备N (2 羟乙基) 邻苯二甲酰亚胺。以DMF为溶剂,邻苯二甲酰亚胺钾盐与氯乙醇在90℃下反应12h,N (2 羟乙基) 邻苯二甲酰亚胺的收率为86%。讨论了反应温度、反应时间、物料比例以及不同溶剂对反应收率的影响。该方法操作简便,实验条件温和,后处理简便,适合N (2 羟乙基) 邻苯二甲酰亚胺的实验室制备。  相似文献   
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