共查询到18条相似文献,搜索用时 109 毫秒
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Hu Rongzu Song Jirong Zhao Fangqi Wang Bozhou Gao Shengli Zhu Chanhua Chen Pei Luo Yang Ning Binke Chen Sanping Shi Qizhen 《化学物理学报(中文版)》2004,17(6):783-786
The kinetic parameters of the exothermic decomposition reaction of the title compound in a temperature-programmed mode have been studied by means of DSC. The DSC data obtained are fitted to the integral, differential and exothermic rate equations by linear least-squares, iterative, combined dichotomous and least-squares methods, respectively. After establishing the most probable general expression of differential and integral mechanism functions by the logical choice method, the corresponding values of the apparent activation energy (Ea), pre-exponential factor (A) and reaction order (n) will be obtained by the exothermic rate equation. The results show that the empirical kinetic model function in differential form and the values of Ea and A of this reaction are (1-α)0.44, 230.4 kJ/mol and 1018.16 s-1, respectively. With the help of the heating rate and obtained kinelic parameters, the kinetic equation of the exothermic decomposition reaction process of the title compound is proposed. The critical temperature of thermal explosion of the compound is 302.6℃. The above-mentioned kinetic parameters are quite useful for analyzing and evaluating the stability and thermal change rule of the title compound. 相似文献
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降冰片二烯及其衍生物是分子光化学贮存太阳能反应体系中研究较多的一类模型化合物[1-4]。但是,从迄今报道的研究工作来看,大部分是关于7-位为碳原子的降冰片二烯衍生物。对于7-位为杂原子的衍生物的光异构化反应以及7-位杂原子对光异构化反应的影响还未见报道。 相似文献
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通过1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷与酸反应或1-(3-氯丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷与胺反应,合成了14种1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷衍生物.体外细胞培养试验结果表明,某些1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷衍生物对艾氏腹水癌细胞具有较好的杀伤活性. 相似文献
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1,2,4-三唑并[3,2-d][1,5]-苯并氧氮杂(艹/卓)化合物的合成 总被引:1,自引:1,他引:0
苯并二氢吡喃-4-酮的芳腙(1)衍生的偶氮基碳正离子(3)与腈发生1,3-偶极环加成反应,加成产物(4)通过「1,2」-迁移扩环重反应,形成新颖的三环系杂环化合物1,2,4-三唑并「3,2-d」「1,5」-苯并氧氮杂Zhuo化合物5a-5k。 相似文献
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通过去甲斑蝥素、去甲去氢斑蝥素和外式双环[2.2.1]庚-5-烯-2,3-二甲酸酐和α-氨基烃基膦酸酯的反应,合成了一系列斑蝥素类似物,并进行了抗肿瘤筛选.以期寻找高效、低毒的抗肿瘤药物.所合成的化合物的结构经1HNMR、MS、IR及元素分析确证. 相似文献
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α-四氢萘酮的乙氧羰基腙(1)经LTA氧化,得到α-偶氮-α-乙酰氧基化合物2.在A lC l3作用下,化合物2脱去乙酰氧基产生重氮正离子中间体3,再经与腈的1,3-偶极环加成、[1,2]-迁移扩环、碱性水解和与苦味酸作用,得到新型[1,2,4]-三唑并[1,5-a][1]苯并氮杂苦味酸盐6a~6c.以2,3-二氢-1-茚酮为底物,采用相同的合成路线,合成了1,2,4-三唑并[1,5-a]-二氢喹啉苦味酸盐12a~12c. 相似文献
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7-氮杂-3,6-二氧杂-二环[3.3.0]辛-2-酮类化合物合成的新方法 总被引:1,自引:0,他引:1
5-甲氧基-2-(5H)-呋喃酮与氮酸硅烷基酯通过1,3-偶极环加成反应可以为7-氮杂-4-甲氧基-3,6-二氧杂-二环[3.3.0]辛-2-酮类化合物提供新的合成途径。通过元素分析、IR、^1HNMR、^13CNMR、MS等波谱分析进行了结构表征。 相似文献
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Reactions of octafluorocyclopentene (C5F8) with 1,5-diazabicyclo[4,3,0]non-5-ene (DBN) are studied by analyses of an isolated product and optical spectra from the viewpoint of applications to gas-sensors. Obtained results suggest that nucleophilic reactions of DBN proceed toward the double bond of C5F8 molecule accompanied with hydroxide anion attack on carbon-fluoride bonds of C5F8 moiety under ambients, forming unique C5F8-modified adducts. The present reaction is conducive to a new type of technologies for quick and selective sensing that can be used to develop alarm systems in the field of the environment and etching processing factories. 相似文献
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Yarmukhamedov N. N. Baibulatova N. Z. Khakimova T. V. Spirikhin L. V. Dokichev V. A. Yunusov M. S. 《Russian Chemical Bulletin》2001,50(2):265-267
Reduction of the nitro groups in 3-(2-hydroxyethyl)-1,5-dinitro-3-azabicyclo[3.3.1]non-6-ene was studied. The structures of the reaction products were confirmed using 1H and 13C NMR spectroscopy. 相似文献
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Hajime Kabashima Hideto Tsuji Hideshi Hattori 《Reaction Kinetics and Catalysis Letters》1996,58(2):255-259
All the alkaline earth oxides exhibit activities for double, bond isomerization of 5-vinylbicyclo[2.2.1]hept-2-ene (VBH) to 5-ethylidenebicyclo[2.2.1]hept-2-ene (EBH) at a reaction temperature of 273 K. The order of the activity on the basis of unit weight of catalyst was CaO>MgO>SrO>BaO when compared under optimum pretreatment conditions. The E/Z ratio in the products is determined by the reaction temperature regardless of the type of catalyst; the ratios were 82/18 and 88/12 for the reaction temperatures of 323 and 273 K, respectively. 相似文献
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I. V. Shakhkeldyan Yu. M. Atroshchenko N. K. Melekhina I. E. Yakunina K. I. Kobrakov A. N. Shumsky 《Chemistry of Heterocyclic Compounds》2008,44(6):690-699
The electrophilic addition of bromine to 3-substituted 1,5-dinitro-3-azabicyclo[3.3.1]non-6-ene in carbon tetrachloride is
accompanied by intramolecular 3,7-cyclization with the formation of 6-bromo-3-R-1,5-dinitro-3-azonia-tricyclo[3.3.103,7]nonane tribromides. In the bromination of 1,5-dinitro-3-azabicyclo[3.3.1]non-6-enes containing substituents at the double
bond, molecular complexes of halogen with the substrate were obtained.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 862–873, June, 2008. 相似文献
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Kuznetsov V. V. Kutepov S. A. Makhova N. N. Lyssenko K. A. Dmitriev D. E. 《Russian Chemical Bulletin》2003,52(3):665-673
A new method was developed for the synthesis of 6-substituted 1,5-diazabicyclo[3.1.0]hexanes and 7-substituted 1,6-diazabicyclo[4.1.0]heptanes by condensation of N-monohalotrimethylene- and N-monohalotetramethylenediamines with carbonyl compounds in the presence of bases. X-ray diffraction studies and quantum-chemical B3LYP/6-31G* calculations demonstrated that the conformations of the resulting bicyclic systems are stabilized by stereoelectronic interactions. As a result, a boat conformation prevails in 1,5-diazabicyclo[3.1.0]hexanes, whereas the energies of chair, half-chair, and boat conformations of 1,6-diazabicyclo[4.1.0]heptanes are equalized. 相似文献
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R. Anjibabu Samaresh Sau B. Jagan Mohan Reddy Rajkumar Banerjee B.V. Subba Reddy 《Tetrahedron letters》2013
A variety of aldehydes undergo a smooth coupling with (4-methylcyclohex-3-en-1-yl)methanol in the presence of 2 mol % of phosphomolybdic acid in dichloromethane to afford 3-oxabicyclo[3.3.1]non-7-ene in good yields through 3,5-oxonium-ene cyclization under mild conditions. The use of inexpensive, nontoxic, and readily available heteropoly acid catalyst makes this method simple, convenient, and environmental-friendly. 相似文献