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以4-全氟壬烯氧基苯磺酰氯和2-甲氨基乙醇为主要原料,经酰胺化、酯化和中和反应制备了硫酸2-(N-甲基-4-全氟壬烯氧基苯磺酰胺基)乙酯钠(I),用红外光谱和19F NMR,1H NMR对中间体和产物分子结构进行了表征,借助正交试验法优化了反应条件。酰胺化反应较佳工艺条件:n(4-全氟壬烯氧基苯磺酰氯): n(2-甲氨基乙醇)=1.0 : 2.0,以三乙胺为缚酸剂,在THF溶剂中,室温下搅拌反应3.0 h,收率93.4 %;酯化反应较佳工艺条件:n( N-羟乙基-N-甲基-4-全氟壬烯氧基苯磺酰胺): n(氯磺酸)=1.0 : 2.0,在THF溶剂中,室温下反应0.5 h,收率97.1 %。硫酸2-(N-甲基-4-全氟壬烯氧基苯磺酰胺基)乙酯钠表面活性剂的临界胶束浓度 8.0×10-4mol/L,γcmc 23.1 mN/m (25℃)。 相似文献
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以N-羟乙基-p-全氟壬烯氧基苯甲酰胺(I)为原料与三氯氧磷(POCl3)反应制备p-全氟壬烯氧基苯甲酰胺基乙基磷酰氯,反应结束后在常温下进行水解生成p-全氟壬烯氧基苯甲酰胺基乙基磷酸单酯(Ⅱ)。采用红外光谱(FTIR)、1HNMR、质谱(MS-ESI)对其结构进行了表征。考察了酯化反应时间、酯化反应温度、原料配比和缚酸剂对产物收率的影响。通过单因素实验和正交试验对反应进行优化,确定了最佳合成工艺条件为:n(I):n(POCl3)=1:1.6,反应温度70℃,反应时间7h,三乙胺做为缚酸剂,在此条件下Ⅱ的收率为84.3%。 相似文献
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以对氨基苯磺酰胺、丙烯酰氯(或甲基丙烯酰氯)为原料合成了N-[4-(磺酰胺)苯基]丙烯酰胺(ASPAA)和N-[4-(磺酰胺)苯基]甲基丙烯酰胺(ASPMAA),其结构经^1H NMR,IR和元素分析表征。合成ASPAA的最佳条件:对氨基苯磺酰胺13.76g(80mmol),n(对氨基苯磺酰胺):n(丙烯酰氯)=1.0:1.1,n(丙烯酰氯):n(NaHCO3):1.00:1.14,0℃~2℃反应3h,反应液倾入10倍体积的的甲醇-水[V(甲醇):V(水)=1:10]中析出产物,收率在60%以上。合成ASPMAA的最佳条件:对氨基苯磺酰胺6.88g(40mmol),n(对氨基苯磺酰胺):n(甲基丙烯酰氯)=1.00:1.05,n(三己胺):n(甲基丙烯酰氯):1.0:1.0,在0℃~2℃滴加甲基丙烯酰氯后先在室温下反应1h,然后在60℃反应1h,反应液倾入700mL石油醚中析出产物,收率50%~60%. 相似文献
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三嗪基苯硫甲基磺酰脲的合成 总被引:2,自引:0,他引:2
苯硫甲基磺酰胺(1)与4,6-二氯-2-三嗪异氰酸酯以碳酸钾为触媒在甲苯中加热回流制得N-4,6-二氯-2-三嗪基苯硫甲基磺酰脲(2),后者进一步与甲醇钠作用得N-4,6-二甲氧基-2-三嗪基苯硫甲基磺酰脲(3)。化合物3d经测试,具有一定的除草活性。 相似文献
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长链含氟烷基三氯硅烷及其衍生物的合成和性质已有不少报道,本文报道一类新的含氟磺酰胺基取代的硅烷衍生物的合成.这类化合物可作为无机硅酸盐材料的表面处理剂,由于含氟基团的引入,使被处理的物质具有氟碳表面的一些特性. 3-氧杂全氟烷基磺酰氟(1)和烯丙胺在三氟三氯乙烷(FC-113)中反应,得到对应的N-烯丙基取代的磺酰胺2;2与甲醇钠-碘甲烷反应,得到N-甲基-N-烯丙基取代的磺酰胺3.2和3分别与三氯硅烷在氯铂酸催化下反应,得到含氟磺酰胺基取代的三氯硅烷4 相似文献
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采用Williamson合成方法,以N,N-二甲基乙醇胺(C4H11NO)、氯代十二烷(C12H25Cl)及固碱(KOH)为原料,环己烷为带水剂,合成了2-月桂氧基-N,N-二甲基乙胺(C16H35NO)。对影响醚化反应各因素:原料配比、反应温度、反应时间以及催化剂的种类进行了探讨。用气相色谱法分析了产物含量,并用FT-IR、GC-MS和元素分析表征了产物结构。实验结果表明最佳工艺条件为:n(C4H11NO)∶n(C12H25Cl)∶n(KOH)=1.7∶1.0∶0.6;醚化反应温度:100℃;醚化反应时间:6h;催化剂:PEG-400(5mol%KOH),在此条件下2-月桂氧基-N,N-二甲基乙胺收率可达84.4%。 相似文献
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利用手持技术改进测定乙醇分子结构实验 总被引:1,自引:0,他引:1
利用压强传感器代替排水集气法,改进测定乙醇分子结构实验的仪器装置,并探索最佳反应条件。另外,设计两个空白实验,结合压强变化曲线对实验误差进行相关讨论。 相似文献
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V. I. Bol'shakova L. I. Demenkova É. N. Shmidt V. A. Pentegova 《Chemistry of Natural Compounds》1989,24(6):691-694
The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 812–816, November–December, 1988. 相似文献
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由于石化行业的生产需要,其材质的使用具有多样性和广泛性,经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识,根据光谱仪的测试能力及标样的采集,实现了一个或几个元素测量范围的扩展,并对其测量的影响因素进行了研究。 相似文献
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Mustafa R. Ibrahim Zacharia A. Fataftah Paul von Ragu Schleyer Peter D. Stout 《Journal of computational chemistry》1987,8(8):1131-1138
Sets of hydrogen molecule equivalents have been developed which permit the calculation of hydrogenation of different types of carbon-carbon bonds from ab initio total energies (3-21G and 6-31G* basis sets, and, to a more limited extent, for MP2/6-31G* data) of reactants and products. The calculated enthalpies of hydrogenation are in good agreement with experiment for unstrained molecules, with average errors on the order of 2 kcal/mol. The 6-31G* equivalents allow the enthalpies for strained molecules to be calculated accurately, but the 3-21G equivalents do not. The equivalents for both basis sets have been tested by calculating the enthalpies of hydrogenation of carbon-carbon bonds in nitrogen- and oxygen-containing organic molecules, free radicals, and classical carbocations. The results are in good agreement with experiment in most cases. 相似文献
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V. I. Bol'shakova L. I. Demenkova É. N. Shmidt V. A. Pentegova 《Chemistry of Natural Compounds》1988,24(6):691-694
The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae. 相似文献
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Influence of viscosity of medium on processes of oxygen quenching of excited states of mesoporphyrin
E. I. Kapinus V. A. Ganzha B. M. Dzhagarov E. I. Sagun V. B. Pavlenko 《Theoretical and Experimental Chemistry》1989,25(2):146-151
The oxygen quenching rate constants for singlet and triplet excited states of the dimethyl ester of mesoporphyrin IX increase with decreasing viscosity of the medium and reach a maximum at a viscosity of approximately 0.4 mPa·sec, after which the rate constants begin to decrease. The drop in rate constant with increasing fluidity of the medium may be related to a nonequilibrium character of the elementary act in the interaction of the reactants in the solvent cage. In viscous media such as isopropyl alcohol, isobutyl alcohol, and isoamyl alcohol, the reaction radius is greater than the sum of the radii of the reacting particles. The long-range character of these processes is due to the relatively weak dependence of the quenching probability on distance.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 161–167, March–April, 1989. 相似文献