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2,6-二氨基吡啶与苦基氯的反应历程研究 总被引:2,自引:0,他引:2
对2,6-二氨基吡啶与苦基氯的反应历程进行了研究。通过二氨基吡啶与几种多硝基卤代苯的反应、溶剂效应、NaF的促进作用和紫外光谱吸收,证实该反应属于芳香族亲核取代反应类型,按加成-消除历程进行,反应过渡态涉及一个Mcisenheimer络合物。 相似文献
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在乙醇-水溶液中合成了14种2,6-双(1′-苯基-3′-甲基-5′-氧代-4′-甲酰吡啶)吡啶稀土配合物,元素分析确定其化学组成的RE2L3.nH2O并用紫外可见光谱、红外光谱,核磁共振谱,热分析,荧光光谱,摩尔电导等进行了表征。 相似文献
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五种含氨基及吡啶基功能性聚合物,2,6-二氨基吡啶树脂(DAPR),2-氨基甲基吡啶树脂(2-AMPR),2-氨基吡啶树脂(2-APR),3-氨基吡啶树脂(3-APR),4-氨基吡啶树脂(4-APR)对Ir(Ⅳ)和Ru(Ⅳ)的最佳吸附酸度均为0.1molHCl/L,对Ir(Ⅳ)的吸附容量分别为1200、786、480、500和381mgIr(Ⅳ)/g树脂,其吸附摩尔比(离子/功能基)分别为2.11 相似文献
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在金属的钠的作用下,通过2,6-二甲基吡啶侧链的烃基化合反应,合成了9个新的2,6-二烷基吡啶化合物,化合物的结构经元素分析,MS,IR,^1HNMR及UV分析确证。 相似文献
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含2-氯-5-吡啶甲基的双氰基取代乙烯酮缩胺类化合物的合成及生物活性 总被引:1,自引:0,他引:1
新烟碱类杀虫剂由于具有高效、低毒、无交互抗性和内吸性等特点,成为杀虫剂领域新的研究热点[1].本文以Nitenpyram为母体,首次合成了2-氰基-3-(2-氯-5-吡啶甲氨基)-3-甲硫基丙烯腈(9),并以其为中间体合成了19个双氰基取代的含2-氯... 相似文献
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3-氨甲基吡啶树脂的合成及五种氨基吡啶树脂对金铂吸附性的比较 总被引:2,自引:0,他引:2
研究了反应物配料比3-AMP/Cl(摩尔比)、反应温度与时间对大孔型3-氨甲基吡啶树脂(3—AMPR)性能的影响规律.在最佳合成工艺条件下制得3-AMPR的功能基含量为3.16mmol/g树脂.3-AMPR对AuCl6(2-),PtCl6(2-),IrCl6(2-),PdCl4(2-),RhCl6(3-)的吸附容量分别为800.8,387.8,386.3,133.0,105.5mg金属/g树脂;配位比分别为1.29,0.63,0.64,0.40,0.33。比较了3—AMPR、2-AMPR、4-氨基吡啶树脂(4-APK)、3—APR、2-APR五种树脂对AuCl4-、PtCl6(2-)的吸附性,其中3-AMPR为最佳。 相似文献
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桥链中含氮,硫杂原子的二酰胺型开链冠醚的合成 总被引:3,自引:0,他引:3
合成了四类桥链中含氮、硫杂原子的二酰胺型开链冠醚,目的是以之作为碱土金属、过渡金属和重金属离子的载体。1a~1c和2a~2c显将N,N-双(2-羟乙基)苯胺和2,6-双(羟甲基)吡啶分别在THF中与NaH和N-取代和N,N-二取代氯乙酰胺反应而制得;而3a~3b和4a~4b则是将2,6-双(氯甲基)吡啶和2,5-双(氯甲基)噻吩分别与巯基乙酸在碱溶液中反应制成双(亚甲硫乙酸),然后与SOCl_2反应成二酰氯,最后胺化而成二酰胺。各化合物的结构均由元素分析、IR、 ̄1HNMR和MS所确证。 相似文献
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3-苯基-5-取代苯氨基-6-甲基-1,2,4-三嗪的合成陆忠娥,曾润生,席海涛(苏州大学化学系,苏州,215006)关键词硫代苯甲酰胺,α-乙酰基硫代甲酰苯胺,N'-氨基苯甲脒,3-苯基-5-取代苯氨基-6-甲基-1,2,4-三嗪1,2,4-三嗪类... 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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The spectral-polarization characteristics of absorption and phosphorescence of molecules of the initial form of nitro-substituted
indolinospirobenzothiopyran were studied in oriented polyethylene films and in solutions with different polarity. An oscillator
model of the electron transitions responsible for the formation of absorption and luminescence spectra was suggested. It was
established that the principal differences in the spectral and photophysical properties of the compound studied and its oxygen-containing
analog are associated with the fact that the electronegativity of the S atom is lower than that of the O atom.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1143–1146, June, 1997. 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
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