共查询到18条相似文献,搜索用时 62 毫秒
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以2-甲基苯并噻唑和1,3-丙磺酸内酯为起始原料,合成了一种菁染料中间体2-(2-乙氧基-1-丁烯基)-1-(3-磺酸丙基)苯并噻唑(3).该染料中间体极易水解,对其水解产物(4e)采用红外光谱、核磁共振、质谱、元素分析和X射线单晶衍射分析等方法进行了表征.MS结果显示水解产物4e的分子量为327;在13C NMR谱图中,烯醇结构中与羟基相连的碳的化学位移为194.05,与之相连的另一个双键碳的化学位移为δ92.52;在IR谱图中,1618 cm-1处存在烯醇的特征吸收峰;通过X射线单晶衍射分析测定了水解产物的结构,进一步证实该水解产物是一种存在共轭芳基结构的稳定烯醇. 相似文献
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为了寻找新的含苯并噻唑稠杂环农药先导化合物,利用取代2-肼基苯并噻唑与取代苯甲酸在三氯氧磷中回流反应,合成了18个新型取代3-芳基-1,2,4-三唑并[3,4-b]苯并噻唑化合物,并利用1H NMR,EI-MS及元素分析对其结构进行了表征.初步生物活性试验结果表明,在50 mg/L浓度下,部分目标化合物对立枯丝核菌(Rhizoctonia solani)、西瓜壳二孢菌(Ascochyta citrullina)、香蕉枯萎病菌(Fusarium oxysporum f.sp.cubense)、烟草炭疽病菌(Colletotrichum nicotianae)具有中等杀菌活性.然而,部分化合物对灰葡萄孢菌(Botrytis cinerea)反而起到一定促进生长作用. 相似文献
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新型含硅唑类化合物的合成及杀菌活性 总被引:1,自引:0,他引:1
合成了20个新型含硅唑类化合物,其化学结构经IR,MS,1HNMR和元素分析确证。生物活性测定显示一些化合物对棉花枯萎病菌等有较好的抑制活性,一些化合物对黄瓜灰霉病菌的抗性菌有很好的活性。讨论了化合物的结构与生物活性关系。 相似文献
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含1,2,4-三唑杂环的新型Strobilurins衍生物的合成及杀菌活性 总被引:4,自引:0,他引:4
为了寻找新的高活性先导化合物, 设计合成了14个未见文献报道的Strobilurins类衍生物, 结构经MS, 1H NMR, 元素分析确认. 并用X-ray单晶衍射测定了(E)-3-甲氧基-2-[(5-甲基-4-邻溴代苯亚甲基亚胺基-1,2,4-三唑)-3-硫亚甲基]-苯基丙烯酸甲酯(5i)的晶体结构, 证实了分子中的两个C=C均为E-式构型. 初步生物活性测试结果表明, 在实验浓度下部分化合物具有一定的杀菌活性. 相似文献
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4-硫醚基喹唑啉类化合物的合成及抑菌活性研究 总被引:2,自引:0,他引:2
以4-氯喹唑啉和巯基化合物为原料, 丙酮作溶剂, 碳酸钾作缚酸剂, 合成了7个新型4-硫醚基喹唑啉类化合物. 采用1H NMR, 13C NMR, IR及元素分析对目标化合物的结构进行了表征. 生物活性测试表明, 化合物1d在50 μg•mL-1 药剂浓度下对小麦赤霉病菌、辣椒枯萎病菌、苹果腐烂病菌的抑菌活性分别达到69.5%, 71.9%和70.8%, EC50分别为25.88, 17.08和28.77 μg•mL-1. 相似文献
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A variety of heterocylic rings incorporating benzothiazole moiety were synthesized by reaction of 1‐(2‐benzothiazolyl)‐1‐cyano‐3‐chloroacetone 1 with salicylaldehyde, o‐aminothiophenol, 2‐aminothiazole, 2‐aminobenzothiazole, 2‐aminobenzimidazole, alcoholic KOH, and sodium sulfide to give compounds 2 , 5 , 6 , 7 , 8 , 9 , 12 , and 14 , respectively. 相似文献
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In order to find novel protoporphyrinogen oxidase inhibitors with high efficacy, broad-spectrum activity, and safety to crops, nine title compounds(4a-4i) were designed and synthesized by introducing pyrimidine moiety into the uracil skeleton with commercially herbicide butafenacil as the lead compound. Their structures were con- firmed by 1H NMR, IR, mass spectroscopy and elemental analysis. The bioassay results indicate that most of com- pounds 4 tested exhibit good to excellent herbicidal activities against B. campestris, A. retroflexus, E. crusgalli and D. sanguinalis in pre-emergence treatment at a dose of 1.5 kg/ha(1 ha=10^4 m^2), for example, compound 4i showed 100% inhibition against the four plants tested in pre-emergence treatment at a dose of 1.5 kg/ha. So, this type of skeleton can be used as a valuable lead compound for the further development of a pre-emergent herbicide. 相似文献
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Khaled S. Mohamed Nayra M. Abdulaziz Ahmed A. Fadda 《Journal of heterocyclic chemistry》2013,50(3):645-649
A variety of pyridine and pyrimidine rings incorporating benzothiazole moiety were synthesized by reaction of 1‐(2‐benzothiazolyl)‐1‐cyano‐3‐chloroacetone ( 1 ) with 2‐pyridone, 2‐thioxopyridine, thiouracil, and 2‐thioxopyrimidine derivatives to give compounds 7,9‐dimethylfuro[2,3‐b:4,5‐b′]dipyridin‐4‐ol 5 , 4, 6‐diphenylthieno[2,3‐b]pyridin‐2‐yl 9 , 2‐(benzo[d]thiazol‐2‐yl)‐2‐(7‐substituted‐5‐oxo‐5H‐thiazolo[3,2‐a]pyrimidin‐3‐yl)acetonitriles 12a and 12b , pyrimido[2,1‐b][1,3]thiazepine‐3‐carboxamide 15 , and benzo[4,5]thiazolo[3,2‐b]pyridazine‐3‐one 20 , respectively. 相似文献
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为了寻找高效的抗肿瘤药物,设计并合成了一系列含苯并噻唑砌块的2,4,6-三取代嘧啶衍生物.采用噻唑蓝(MTT)法对目标化合物在人类四种癌细胞[EC-109(人食管癌细胞)、MGC-803(人胃癌细胞)、PC-3(人前列腺癌细胞)、Hep G-2(人肝癌细胞)]、GES-1(人正常胃黏膜上皮细胞)和HEEC(人正常食管细胞)中进行抗肿瘤活性评价,结果显示部分化合物对MGC-803和PC-3细胞表现出中度至强效的抗肿瘤活性.其中2-(((4-(4-(吡啶-2-基)哌嗪-1-基)-6-(三氟甲基)嘧啶-2-基)硫基)甲基)苯并[d]噻唑(13h)和2-(((4-(4-(嘧啶-2-基)哌嗪-1-基)-6-(三-氟甲基)嘧啶-2-基)硫代)甲基)苯并[d]噻唑(13i)对PC-3表现出比较好的抗肿瘤活性, IC50值分别3.82和2.29μmol/L,且化合物13h和13i对GES-1的细胞增值毒性明显小于阳性对照5-氟尿嘧啶. 相似文献
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Lei Liu Hui-zhu Yuan Zhao-hai Qin Xiao-jing Yan Yu-mei Xiao Nan Li 《Phosphorus, sulfur, and silicon and the related elements》2013,188(8):1790-1800
Abstract A series of novel 1,3-thiazoline derivatives containing a 5- or 6-position halogenated indole moiety were synthesized via a one-pot and three-step reaction. Their structures were confirmed by spectroscopic methods. The fungicidal activities of all the title compounds were evaluated. Most of them exhibited moderate to high activity against eight plant pathogens at the concentration of 50 ug/mL. Generally the fungicidal activity of fluorinated indolyl thiazolines was higher than that of chlorinated indolyl thiazoline derivatives. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT 相似文献