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本实验合成了四种1,4-二氢吡啶-3,5-二羧酸酯类化合物,产率稳定,并通过熔点和红外光谱初步确认了这些化合物。 相似文献
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1,3,5-三芳基-2-吡唑啉化合物光物理行为的研究博士研究生闫正林导师吴世康(学位授予单位中国科学院感光化学研究所,北京100101)为了进一步了解电子转移过程中所存在的一些问题,本工作设计合成了一系列带不同取代基的1,3,5-三芳基-2-吡唑啉化... 相似文献
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报道了9个新型二硝基化合物的合成。将1,5-二(2-硝基苯氧基)-N-对甲苯磺酞基-3-氮杂戊烷用33%HBr-HAc脱磺酰基得到1,5-二(2-硝基苯氧基)-3-氮杂戊烷。N-取代氮芥与邻硝基苯酚在碳酸钾存在下,在DMF中,于80℃缩合反应6h得到N-取代-1,5-二(2-硝基苯氧基)-3-氮杂戊烷,取代基为:CH_2CH=CH_2,C_4H_(9-n),C_5H_(11-n),CH_2CH_2OCH_3,CH_2CH_2OC_2H_5,CH_2CH_2OC_4H_(9-n),(CH_2CH_2O)_2CH_3,(CH_2CH_2O)_2C_4H_(9-n)。 相似文献
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在原甲酸三乙酯和高氯酸的存在下,3-乙酰基酚酮1与3,4,5-三甲氧基苯甲醛(TMB)2反应一步得到2-(3,4,5-三甲氧基)苯基-4,9-二氢环庚并吡喃-4,9-二酮3。化合物3为尚未见文献报道的新化合物,其结构经红外光谱、核磁共振谱及元素分析证实。 相似文献
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1,3,5-三甲基苯二腈氧化物对胶料工艺性能的影响БоикоВ.В等著赵瑞明译研究含1,3,5-三甲基苯二腈氧化物的二烯类弹性体溶液的流变性能[1]以及将该化合物加进橡胶后交联度的变化[2]表明,这种化合物是不饱和弹性体的低温硫化剂。为了预测含1,3... 相似文献
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2,5-二甲基-2,4-己二烯的合成 总被引:1,自引:0,他引:1
本文以2,5-二甲基-2,5-己二醇为原料,分别用三氧化二铝、三氧化二铬和磷酸催化脱水合成2,5-二甲基-2,4-己二烯,同时用三氧化工铬作催化剂对醇脱水生成的混合二烯烃进行了异构化。 相似文献
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《溶剂提取与离子交换》2012,30(7):489-499
ABSTRACTA continuous counter-current test to separate minor actinides (MAs: Am and Cm) by N,N,N’,N’,N’’,N’’-hexaoctyl nitrilotriacetamide (HONTA) as an extractant was performed using mixer-settler extractors installed in a hot cell. Nitric acid of 0.08 M (mol/dm3) containing MAs and rare earths (REs) recovered from high-level liquid waste was used as the feed, and the experiment was conducted for 14 h. MAs were extracted by 0.05 M HONTA dissolved in n-dodecane, with Am and Cm being recovered at 94.9% and 78.9%, respectively. HONTA hardly extracted Y, La, and Eu from the feed (99.9% for Y, 99.9% for La, and 96.7% for Eu), most of which were distributed to the RE fraction. A portion of Nd was extracted by HONTA, and consequently the ratio of Nd in the RE fraction was 83.5%. HONTA could separate MAs and REs by adjusting the nitric acid concentration without using complexants. In addition, the concentrations of MAs and some REs in each stage were calculated using a simulation code, and the results are consistent with the experimental values. This code indicates that the ratios of MAs in the MA fraction and REs in the RE fraction could be ≥99% by optimizing separation conditions. 相似文献
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报道了以具有抗癌和抗艾滋病毒活性的β-D-氨基葡萄糖与二茂铁二甲酸作起始原料合成一种糖/金属有机化合物——N,N′-二茂铁二甲酰氨基葡萄糖的方法。第一步,将氨基葡萄糖用苯甲醛保护氨基后,用乙酸酐再保护羟基,然后在加有盐酸的丙酮中去氨基保护,得1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖盐酸盐;将二茂铁二甲酸与草酰氯在干燥的二氯甲烷中反应得到二茂铁二甲酰氯。第二步,将第一步所得的两个中间产物,在室温下加入干燥的二氯甲烷和苯的混合溶剂中,在三乙胺存在下进行反应,得目标产物,收率35.7%,系红棕色固体,熔点198~200℃。目标化合物是具有双药效基团的物质。用元素分析,红外光谱和核磁共振波谱进行了表征。 相似文献
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N,N′-双(3-甲基苯基)-N,N′-二苯基联苯胺的合成 总被引:3,自引:0,他引:3
以二苯胺为起始原料,经两步反应合成了有机电致发光材料N,N′ 双(3 甲基苯基) N,N′ 二苯基联苯胺(TPD)。通过优化实验得到最佳的合成工艺为:二苯胺在20℃下,以V(冰醋酸)∶V(水)=1∶4为溶剂,加入重铬酸钾进行反应得N,N′ 二苯基联苯胺,分离提纯后,再加入18 冠 6相转移催化剂,以邻二氯苯为溶剂在氮气保护下与间碘甲苯进行乌尔曼反应,在200℃下反应20h,产物经柱层析和重结晶提纯。TPD收率为85%,较文献提高5%,w(TPD)=99 92%。并用元素分析、红外光谱和核磁共振对产物的结构进行了表征。 相似文献
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Yu Kang Zhi Liu Yingyun Long Baolong Wang Xu Yang Di Sha Kai Shi Xiangling Ji Bai Li Yonggang Liu 《应用聚合物科学杂志》2021,138(48):51811
N,N,N-trimethyl chitosan (TMC) with molar mass 29 ~ 136 kg/mol and degree of quaternization 70% ~ 82% was synthesized from chitosan via N,N-dimethyl chitosan (DMC) by a two-step method. Size exclusion chromatography (SEC) coupled with multiangle laser light scattering was employed to characterize the molar mass and chain conformation of DMC and TMC. Nearly no degradation was found for DMC, but degradation by ~50% was observed from TMC. Apart from degradation, the shift of SEC peak toward higher elution volume for N-methylated chitosan was attributed to the increase in chain flexibility. It was shown that chitosan, DMC, and TMC took a random coil conformation in 200 mM acetate buffer, with persistence length decreased from 10 nm for chitosan, to 5.7 nm for DMC and 3.2 nm for TMC. The significant increase in chain flexibility upon N-methylation is most probably due to the breakage of intramolecular hydrogen bonds between chitosan repeating units. 相似文献
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制备了酸洗有机缓蚀剂O,O’-二(环己基)二硫代磷酸-N,N,N-三乙铵(NTOD),采用失重法、电化学法研究了NTOD在5%HCl溶液中对Q235钢的缓蚀性能和吸附行为。研究结果表明:NTOD在5%HCl溶液中是一种混合型缓蚀剂,在5%HCl溶液中的最高缓蚀率达到97%;NTOD在Q235钢表面的吸附完全符合Langmuir吸附等温式,属化学吸附。同时,还研究了腐蚀体系温度、酸浓度、放置时间对NTOD缓蚀性能的影响。 相似文献
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研究了由N,N,N′,N′-对四甲基苯二胺(TMPD)/电子受体组成的光致电子转移变色体系,及其在溶液中和高分子膜中的光反应和热稳定性。实验结果表明这类光致变色体系具有较高速度的光响应能力。在不同芳胺/碘鎓盐(DPIOC)组成的体系中,可观察到电子转移速度随芳胺的氧化还原电位下降而增加:TMPD>N,N-二甲基苯胺>三苯胺>二苯胺。光反应速度和反应物浓度具有一定指数关系,分别为0.66(TMPD)和0.16(二苯基碘铕盐)。在TMPD/卤代烃(RX)组成的体系中,发现卤代烃的C—X键较弱时,体系的光致生色反应速度较快。显然,这是由于反应中间产物(RX~-)的分解有利于减少电子逆转移反应的缘故。在聚甲基丙烯酸甲酯高分子膜中的光致生色反应效率显著地高于溶液中的反应效率,并能获得较高的光密度。热稳定性结果表明,温度对色稳定性有显著影响,每经过一次生色/褪色循环,体系的发色能力下降一半左右。 相似文献
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以联苯胺和二苯胺为原料,经两步反应合成了N,N,N′,N′-四苯基联苯胺(TPB)。与已报道的方法相比较,该方法具有产率高、操作简单、原料价格低廉等优点。 相似文献
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Moderately concentrated solutions of polystyryllithium in benzene were prepared under high vacuum conditions in an Ubbelohde viscometer and the active chain ends were ‘capped’ with a few molecules of butadiene. The flow times of these solutions were determined before and after the addition of small aliquots of N,N,N′,N′-tetramethylethylenediamine (TMEDA) and finally following protonation of the carbanions with a trace of alcohol. The addition of the TMEDA caused a decrease in the viscosity that was slightly greater than that predicted on the basis that two molecules of TMEDA cause the disaggregation of a dimeric polybutadienyllithium associate. 相似文献