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2-三氟苯甲酰肼与芳酰氯反应制得N,N′-二酰肼(2)。2在三氯氧磷存在下脱水闭环,合成了一系列2-(2-三氟苯基)-5-芳基-1,3,4-噁二唑类化合物,其结构经1H NMR,IR,MS和元素分析表征。 相似文献
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以氧、氮为配位原子的锰配合物特别是多核配合物由于可作为多种锰蛋白活性部位的模型配合物研究,因此日益受到人们的关注。以β-二酮和芳酰肼形成的腙类化合物(H_2L)可作为三齿配体(ONO)以HL~-和L~(2-)的形式和过渡金属离子配位,但至今未见有关锰配合物的研究报导。本文利用由苯甲酰丙酮和苯甲酰肼缩合而形成的苯甲酰丙酮苯甲酰腙C_(17)H_(16)O_2N_2(H_2L)合成了锰(Ⅲ)配合物Mn(HL)L、Mn(HL)L·H_2O和Mn_2L_2(OCH_3)_2·2H_2O。 相似文献
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基质固相分散-超高效液相色谱-串联质谱法检测蔬菜中残留的苯甲酰脲类和双酰肼类杀虫剂 总被引:3,自引:0,他引:3
建立了基质固相分散技术结合超高效液相色谱-串联质谱(UPLC-MS/MS)测定蔬菜中苯甲酰脲类杀虫剂(除虫脲、灭幼脲、杀铃脲、氟苯脲、氟虫脲、氟啶脲、氟铃脲)和双酰肼类杀虫剂(甲氧虫酰肼、虫酰肼)的方法。蔬菜样品经中性氧化铝和石墨化炭黑研磨,乙酸乙酯淋洗,洗脱液浓缩定容后,经超高效液相色谱分离,分别在正、负离子多反应监测(MRM)模式下用电喷雾电离串联质谱测定,外标法定量。结果表明,9种杀虫剂在1~100 μg/L质量浓度范围内有良好的线性关系(R2≥0.99);在1、5、10、100 μg/kg 4个加标水平上的回收率为78.5%~112.8%;相对标准偏差为2.3%~10.2%,检出限为0.5~1.0 μg/kg。该方法操作简便快速,样品和溶剂用量少,检出限低,可满足蔬菜中苯甲酰脲类和双酰肼类杀虫剂同时检测的要求。 相似文献
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依据邻羟基二苯醚及芳香肼类化合物的抗菌特性, 以邻羟苯基为分子核心, 酰肼键为桥基, 设计合成了7种未见报道的N-(取代苯基)乙基-2-羟基苯甲酰肼类化合物. 以水杨酸甲酯为原料, 经肼解反应后与取代苯乙酮缩合, 再与硼氢化钠反应制得目标化合物, 化合物结构经IR, 1H NMR和元素分析等证实. 抗菌活性测试结果表明, 该类化合物对不同菌株的抑菌活性具有明显的选择性和特异性. 当质量浓度为1×10-4 g/mL时, 化合物3b和3e对大肠杆菌和白色念珠菌的抑菌率高达100%, 有极强的抑菌活性; 所有化合物对金黄色葡萄球菌的抑菌率均大于70%, 有一定的抑菌活性. 构效关系分析结果表明, 苯基中引入Cl或Br等卤原子能显著增强化合物的抑菌活性, 而引入-NO2及-CH3基团则会降低其抑菌活性. 相似文献
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1-芳酰基-4-(5-芳基-2-呋喃甲酰基)氨基硫脲衍生物的合成及其生物活性 总被引:11,自引:0,他引:11
酰胺基硫脲;芳基酰肼;1-芳酰基-4-(5-芳基-2-呋喃甲酰基)氨基硫脲衍生物的合成及其生物活性 相似文献
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Phosphatidylinositol polyphosphate (PIPx) are related with tyrosine kinase activation and cell proliferation and carcinogenesis. PIPx is an important target compound for synthetic organic chemist. PIPx having saturated fatty acid components have been reported. Recently we have succeeded in the synthesis of phosphatydylinositol-3,4,5-trisphosphate with unsaturated fatty acid component by the reaction of diethyl chlorophosphite with l,2-di-O-cyclohexylidene-3,4-O-(tetraisopropyldisiloxane 1,3-diyl)-6-O-(4-oxopentanoyl)-myo-inositol. 相似文献
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Vitamin B12 was applied as catalyst for the one-pot three-component synthesis of 3,4,5-trisubstituted furan-2(5H)-ones from the condensation between aldehydes, amines and dialkylacetylendicarboxylates at ambient temperature in EtOH. In addition, N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates were synthesised using mentioned catalyst at ambient temperature in EtOH from condensation between formaldehyde, amines, and dialkylacetylenedicarboxylates. This methodology has number of advantages such as:use of green and nonhazardous catalyst, clean work up, short reaction times, high yields and no need to column chromatography. 相似文献
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以4-氨基-5-(3,4,5-三甲氧基苯基)-3-巯基-1,2,4-三唑为原料,环化得到6-巯基-3-(3,4,5-三甲氧基苯基)-1,2,4-三唑[3,4-b][1,3,4]噻二唑再与取代苄氯反应,得到9个6-取代苄硫基-3-(3,4,5-三甲氧基苯基)-1,2,4-三唑[3,4-b][1,3,4]噻二唑类衍生物3a~3i.其结构经IR,1H NMR,MS和元素分析确证.初步生物活性测试结果表明部分化合物有一定的杀菌活性. 相似文献
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取代苯甲醛与4-氨基-5-(3,4,5-三甲氧基苯基)-1,2,4-三唑-3-硫酮(2)缩合生成5-(3,4,5-三甲氧基苯基)-4-取代苯基亚胺基-1,2,4-三唑-3-硫酮(3),再烷基加成化为新型5,6-2H-1,2,4-三唑[3,4-b][1,3,4]噻二嗪衍生物4.化合物结构经1HNMR 13C NMR,IR以及元素分析确认.采用噻唑兰(MTT)比色法进行化合物抑制人体前列腺癌细胞(PC3)体外活性测试,结果表明所合成的化合物具有不同程度的抑制PC3活性,其中化合物4a在10μmol·L-1浓度下对PC3的抑制率为75.9%. 相似文献
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Kun Tang JianJun Zhang Ning Ren JunRu Zheng JingYu Liu KeZhong Wu 《中国科学:化学(英文版)》2012,55(7):1283-1293
A series of lanthanide complexes with the 3,4,5-trimethoxybenzoic acid(3,4,5-tmoba) and 1,10-phenanthroline(phen),[Ln(3,4,5-tmoba) 3 phen] 2(Ln = Pr(1),Nd(2) and Ho(3)),have been synthesized and characterized by a series of techniques including elemental analysis,IR spectra,X-ray crystallography and TG/DSC-FTIR technology.The three complexes have two kinds of coordination modes,in which the Pr 3+ and Nd 3+ cations are nine-coordinated and the Ho 3+ cation is eight-coordinated.The three-dimensional IR accumulation spectra of gaseous products for complexes 1-3 were analyzed and the gaseous products were identified by the typical IR spectra obtained from the 3D surface graphs.Meanwhile,we obtained the activation energy E of the first steps of complexes 1-3 by the integral isoconversional non-linear(NL-INT) method and discussed the non-isothermal kinetics of complexes 1-3 using the Malek method.Finally,SB(m,n) was defined as the kinetic method of the first-step thermal decomposition.The thermodynamic parameters △G≠,△H≠ and △S≠ of activation at the peak temperature were also calculated. 相似文献
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Yu H. G. Yu Dong J. X. Qin C. Q. Liu Y. Qu S. S. 《Journal of Thermal Analysis and Calorimetry》2004,75(3):807-813
The energy of combustion of crystalline 3,4,5-trimethoxybenzoic acid in oxygen at T=298.15 K was determined to be -4795.9±1.3 kJ mol-1 using combustion calorimetry. The derived standard molar enthalpies of formation of 3,4,5-trimethoxybenzoic acid in crystalline
and gaseous states at T=298.15 K, ΔfHm
Θ (cr) and ΔfHm
Θ (g), were -852.9±1.9 and -721.7±2.0 kJ mol-1, respectively. The reliability of the results obtained was commented upon and compared with literature values.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献