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N-芳基-N'-[(4-吡啶基)羰基]氨基硫脲用85%的水合肼环化, 得到3-(4-吡啶基)-4-氨基-5-芳氨基-1,2,4-三唑(2a~2c). 然后再与3-甲酰基色酮(3a~3d)反应, 制备得到了一系列新化合物: 3-(4-吡啶基)-4-(6-取代色酮-3-基亚甲氨基)-5-芳氨基-1,2,4-三唑(4a~4c, 5a~5c, 6a~6c, 7a~7c). 化合物的结构经元素分析, IR, 1H NMR和MS确证. 相似文献
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以对称二氨基硫脲为原料,与冰醋酸反应生成5-甲基-4-氨基-1,2,4-三唑-3-硫酮(1);在弱酸性条件下,1与取代水杨醛反应生成席夫碱中间体5-甲基-4-(N-取代邻羟苯基)亚胺基-1,2,4-三唑-3-硫酮(2a~2c);最后在碱性条件下分别与N-取代苯基-2-氯乙酰胺发生烷基化反应生成15种未见报道的目标化合物3-(N-取代苯基-2-乙酰胺基)硫基-4-(N-取代邻羟苯基)亚胺基-5-甲基-1,2,4-三唑(3a~3o),其结构经IR,1H NMR,13C NMR确证.初步生物测试表明,质量分数为0.01%时,3a~3o对白色念珠菌的抑菌率均达90%以上,具有很强的抑菌活性;对金黄色葡萄球菌、大肠杆菌的抑菌率达80%以上,具有较强的抑菌活性. 相似文献
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4-叔丁基-5-(1,2,4-三唑-1-基)-2-苄亚氨基噻唑的合成、晶体结构和抗菌活性 总被引:2,自引:0,他引:2
以履代(口片)吶酮,经1,2,4-三唑取以、溴以、硫脲环合得到4-叔丁基-5-(1,2,4-三唑-1-基)-2-氨基噻唑;再与芳醛缩合合成一系列新4-叔丁基-5-(1,2,4-三唑-1-基)-2-苄亚氨基噻唑(5).用单晶X射线衍射测定了化合物5a的晶体结构.化合物5a的晶体属三斜晶系,空间群以P-1,晶胞参数以:a=0.72749(12)nm,b=0.93463(15)nm,c=1.3398(2)nm,α=70.185(2)°,β=75.669(2)°,γ=73.611(2)°;V=0.8105(2)nm3,Z=2,Dc=1.342g/cm3,F(000)=344,R1=0.0431,wR2=0.1611,S=1.01.生物活性实验结果表明:化合物5c(25mg/L)对小麦赤霉病菌、稻曲病菌、对黄瓜灰霉病菌和稻纹枯病菌的抑制率分别以100%,100%,82.8%和80.3%.化合物5d(25mg/L)对稻纹枯病菌、油菜菌核病菌、小麦赤霉病菌和稻曲病菌的抑制率分别以100%,95.5%,100%和100%.化合物5e(25mg/L)对小麦赤霉病菌的抑制率以100%.5d对小麦赤霉病菌、油菜菌核病菌和水稻纹枯病菌的EC50值分别以1.16,1.38和1.47mg/L. 相似文献
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共价键均裂在含能分子的热分解过程中普遍存在,因此极为重要.然而,以往的理论研究通常用键能(ΔH,BDE)估算均裂能垒,因忽略了熵效应,必然造成较大误差.采用对称破缺密度泛函方法(BS-UB3LYP/6-311+G**),对含能分子3-硝基-1,2,4-三唑-5-酮(NTO)的热分解机理进行了系统研究和梳理,计算了共价键均裂的过渡态及能垒.结果表明,C—NO2键均裂和随后的自由基复合是最优途径,能垒为216.9 k J?mol-1 (523 K).随后产生的NO自由基通过多次“复合-均裂”过程促进三唑中间体开环,分解为HNCO,N2O和CO等小分子,它们相互反应又生成NO2,N2和CO2.这些分解产物与诸多实验观测结果一致. 相似文献
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1,2,4-三唑及其衍生物作为配体与中过渡金属离子能形成多种配合物,这些配合物可表现出良好的生物活性或特殊的电磁性能.因此,过渡金属的三唑配合物的结构和物理特性引起了人们的广泛关注[1-6]. 相似文献
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采用密度泛函理论,在B3LYP/6-311G**基组水平上,计算并考察了4(3H)-嘧啶酮及其类似物(5-氟-4(3H)-嘧啶酮、4-巯基嘧啶和5-氟-4-巯基嘧啶)醇式结构和酮式结构进行结构互变质子迁移过程中的2种可能途径:(a)分子内质子迁移;(b)水助质子迁移.计算结果表明,途经b所需要的活化能较小.研究还表明,氢键在降低反应活化能方面起着重要的作用. 相似文献
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V. O. Kozminykh D. B. Oborin V. I. Goncharov E. N. Kozminykh 《Chemistry of Heterocyclic Compounds》2007,43(8):978-980
3-Hydroxy-3-(2-oxoethyl)-6-phenyl-2,3-dihydropyridazin-4(1H)-ones were obtained by the reaction of methyl 3-oxo-5-phenylfuran-2(3H)-ylideneacetate
or 2-[2-(4-chlorophenyl)-2-oxoethylidene]-5-phenylfuran-3(2H)-one with benzoic or p-nitrobenzoic isopropylidenehydrazides.
Equilibrium C(5)H and C(5)H2 tautomeric forms were detected in solutions of the 4-chlorophenyl derivatives in DMSO-d6.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1156–1158, August, 2007. 相似文献
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S. E. Semenov A. M. Churakov L. F. Chertanova Yu. A. Strelenko S. L. Ioffe V. A. Tartakovskii 《Russian Chemical Bulletin》1992,41(2):277-279
By reaction of 4-amino-1,2,4-triazole with 1-nitroso-2,4,6-trichlorobenzene in the presence of excess dibromoisocyanurate the title compound was obtained.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 2, pp. 362–364, February, 1992. 相似文献
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在NaHSO4催化下,以苯甲醛和邻氨基苯甲酰胺为底物,在室温下合成了一系列2-芳基-2,3-二氢-4(1H)-喹唑啉酮类化合物,该反应产率高、操作简单、并且避免使用有毒的金属催化剂. 相似文献
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T. V. Shokol V. A. Turov A. V. Turov N. V. Krivokhizha V. V. Semenyuchenko V. P. Khilya 《Chemistry of Heterocyclic Compounds》2005,41(11):1411-1418
The condensation of 4-phenyl-1,2,4-triazol-3-ylacetonitrile with 2-methyl-, 4-ethylresorcinol, and with pyrogallol gave α-(4-phenyl-1,2,4-triazol-3-yl)-2,4-dihydroxyacetophenones.
Upon treatment with acid anhydrides and chlorides and subsequent hydrolysis these form 7-hydroxy-3-(4-phenyl)-1,2,4-triazol-3-yl)chromones
with different substituents in both the benzene and the pyrone rings.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1676–1684, November, 2005. 相似文献
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在无催化剂存在下, 以水为溶剂通过5-芳氧基-4-苯基-1,2,4-三唑-3-硫酮与氯乙酰芳胺的硫烷基化反应, 合成了14个未见文献报道的2-(5-芳氧基-4-苯基-1,2,4-三唑-3-硫基)乙酰芳胺. 其结构经元素分析, IR和1H NMR进行了表征, 利用单晶X射线衍射法测定了化合物5n的单晶结构. 该化合物通过分子间氢键自组装成三维网状结构的超分子. 生物活性试验表明部分化合物对小麦的根有促进作用而对所有的茎都有抑制活性. 相似文献
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A new approach to the facile synthesis of 2-substituted-quinazolin-4(3H)-ones and its derivatives using the condensation reaction of substituted 2-aminobenzamide and orthoesters is reported. 相似文献
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A series of 3-(3-alkyl-5-thioxo-1H-4,5-dihydro-1,2,4-triazol-4-yl)aminocarbonylchromones has been prepared by oxidation of 3-formylchromone with Jones' reagent followed by reaction with 3-alkyl-4-amino-4,5-dihydro-1,2,4-triazole-5(1H)-thione in the presence of POCl3. The structures of the compounds were confirmed by IR, LC-MS, and 1H NMR spectra and elemental analyses. 相似文献
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The title compound 2-(3-methyl-5-(methylthio)-4H-1,2,4-triazol-4-yl)isoindoline-1,3-dione(C12H10N4O2S, Mr = 274.30) has been synthesized by a three-step procedure including the cyclization, hydrazinolysis and substitution reactions, and its crystal structure was determined by X-ray single-crystal diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 12.264(3), b = 14.646(3), c = 14.349(4) , β = 91.69(3)°, μ = 0.255 mm-1, Mr = 274.30, V = 2576.2(10) 3, Z = 8, Dc = 1.414 g/cm3, F(000) = 1136, R = 0.0487 and w R = 0.1329 for 4048 observed reflections with Ⅰ 2σ(Ⅰ). In addition, the preliminary bioassay suggested that the title compound 6 exhibits relatively good antitumor activity against HT-29 and MCF-7. 相似文献