共查询到18条相似文献,搜索用时 109 毫秒
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为寻找具有优良杀菌活性的吲哚衍生物,以吲哚等为原料利用Vilsmeier反应制得3-乙酰吲哚,然后经过羟醛缩合、加成-消除反应合成了一系列新型含吲哚环的2-丙烯-1-酮肟醚3a~3j,其结构通过IR,1H NMR,ESI-MS和元素分析确证.用生长速率法测试了目标化合物对番茄灰霉菌和西瓜炭疽菌的离体抑菌活性,结果表明化合物对两种病原菌有一定的抑制活性,其中3f和3g对番茄灰霉菌抑制活性较高,在浓度为100μg/mL时抑制率分别为81%和74%. 相似文献
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1-苯基-3-(3'-吲哚基)-5-取代苯基-2-吡唑啉的合成及1H NMR和MS中的取代基效应 总被引:1,自引:0,他引:1
J-(3'-吲哚基)-3-取代苯基-2-丙烯-1-酮与茉肼反应,合成了10种新的1-苯基-3-(3'-吲哚基)-5-取代苯基-2-吡唑啉衍生物,其结构通过各种波谱证实.讨论了此系列化合物1HNMR和Ms中的取代基效应,得出取代基常数σ或σ+与质子化学位移,碎片相对丰度之间存在着良好的线性关系. 相似文献
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姜黄素-N-取代吡唑类衍生物合成及抑菌活性 总被引:1,自引:0,他引:1
为了寻求杀菌剂的新的先导化合物,用姜黄素与取代酰肼反应得到13个新的姜黄素-N-取代吡唑类衍生物,其结构经IR,1H NMR,13C NMR,MS和元素分析所表征,初步抑菌实验结果表明,在1×10-4mol/L浓度下,所有衍生物与姜黄素对比,对枯草杆菌、金黄色葡萄球菌、大肠杆菌、青霉、黑霉有较好的抑菌效果.其中,3,5-二(4-羟基-3-甲氧基苯基乙烯基)-N-脒基吡唑(3c),3,5-二(4-羟基-3-甲氧基苯基乙烯基)-N-(苯并噻唑-2-硫基乙酰基)吡唑(3k),3,5-二(4-羟基-3-甲氧基苯基乙烯基)-N-(香豆素-3-甲酰基)吡唑(3m)有优异的抑菌效果(抑菌圈16.34~23.81 mm).这些结果表明含有噻唑环、脒基、香豆素环取代基可能有助于提高姜黄素-N-取代吡唑类衍生物的活性. 相似文献
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采用活性基团拼接法,以2,3-二氯吡啶和马来酸二乙酯为起始原料,由胺基化合物与中间体6合成了10个新的5-吡唑酰胺类化合物,通过IR,1HNMR,13CNMR和元素分析对其结构进行了表征.初步生物活性测试结果表明,在100μg/mL浓度下,化合物7a~7j具有一定杀虫活性.其中化合物7a和7d对褐飞虱的防治效果分别为57.6%和64.4%,与对照药剂噻嗪酮杀虫活性基本相当.作用机制测试结果表明7d对褐飞虱乙酰胆碱酯酶活性的抑制率为75.21%,高于噻嗪酮对褐飞虱乙酰胆碱酯酶的抑制率(52.17%). 相似文献
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Yu-Tao Zheng Teng-Teng Zhang Pei-Yi Wang Zhi-Bing Wu Lei Zhou Yi-Qiang Ye Xiang Zhou Ming He Song Yang 《中国化学快报》2017,28(2):253-256
By introducing the pyrazole moiety into the 5-position of 1,3,4-oxadiazole,a series of novel 2-(thioether/sulfone)-5-pyrazolyl-l,3,4-oxadiazole derivatives were synthesized.Preliminary bioassays suggested that target compounds exhibited appreciable activity against pathogenic bacteria Xanthomonas oryzae pv.oryzae(Xoo) and five phytopathogenic fungi in vitro.Among them,the half-maximal effective concentration(EC_(50)) values of 6c,7a,7b and 7c against Xoo were within 16.6 μg/mL and 65.7 μg/mL,which were better than those of commercial agricultural antibacterial bismerthiazol(92.6 μg/mL) and thiodiazole copper(121.8 μg/mL).While compounds 7a,7b,and 7c exerted comprehensive antifungal activity toward five plant fungi,which were comparable with that of hymexazol.The results demonstrated that this kind of compounds can be further studied and developed as promising antifungal and antibacterial agents. 相似文献
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以冰乙酸为催化剂,将取代吡唑甲醛和巴比妥酸或硫代巴比妥酸在无水乙醇中进行Knoevenagel缩合反应,合成了6个5-(取代吡唑基-4-次甲基)(硫代)巴比妥酸。标题化合物经IR、1^HNMR、元素分析确证结构。 相似文献
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Hongwu He Meiqiang Li Aihong Lu Zhaojie Liu 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6-7):1651-1655
Methyl 1-(5-methyl isoxazol-3-oxy acetoxy) alkyl methyl phosphinates were synthesized by the condensation of O-methyl methyl 1-hydroxyalkyl phosphinates moiety with 5-methyl isoxazol-3-oxy acetyl chloride and were tested for plant growth regulatory activity and herbicidal activity. Some compounds exhibited notable plant regulatory activity and herbicidal activity. 相似文献
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1-(取代吡唑-4-甲酰基)吡唑类化合物的合成及生物活性研究 总被引:4,自引:0,他引:4
设计合成了25个新型1-取代吡唑甲酰基吡唑系列衍生物,化合物结构经1HNMR、元素分析、IR和MS确证.生物活性测试结果表明,该类化合物具有一定除草活性,讨论了其结构与活性的关系. 相似文献
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Novel 2-(3-trifluoromethylphenoxy)-4-trifluoromethylthiazole-5-carboxamides were designed and synthesized utilizing ethyl 3-amino-4,4,4-trifluoro-2-butenoate as a starting material via six steps. Subsequently, their biological activities were evaluated in the greenhouse. Results indicated that several compounds have some insecticidal or fungicidal activity at 600 g ai/ha and 300 g ai/ha, respectively. 相似文献
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A novel bis-heterocyclic compound was synthesized and characterized. The crystal structure of the title compound (C22H20ClN5OS, Mr = 437.94) has been determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P-1 with a = 8.646 (2), b = 9.148 (3), c = 14.540 (4) Å, α = 94.422 (4), β = 98.500 (4), γ = 102.823 (4)°, V = 1101.8 (5) Å3, Z = 2, F(000) = 312, Dc = 1.320 g/cm3, μ = 0.2900 mm?1, the final R 1 = 0.041000 and wR 2 = 0.1160 for 2675 observed reflections with I > 2σ(I). A total of 5623 reflections were collected, of which 3866 were independent (R int = 0.019000). The fungicidal activity of title compound was determined, the results showed the title compound displayed moderate fungicidal activity against G. zeae Petch, Phytophthora infestans (Mont.) de Bary, Botryosphaeria berengeriana f. sp. piricola (Nose) koganezawa et Sakuma, Fusarium oxysporum f.sp. cucumerinum, and Cercospora arachidicola. 相似文献
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以6-氯-3-吡啶甲醛为原料, 通过多步反应合成了一系列3-(吗啉吡啶基)-5-取代异噁唑类化合物, 并用IR, 1H NMR, 13C NMR和MS进行了结构确证. 这些化合物均以异噁唑为母核, 具有近似的平面结构, 在异噁唑环的3-位引入吗啉吡啶基, 而在5-位引入酯基、取代氨基、三唑环和噁唑烷酮环. 研究了这些化合物对金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、表皮葡萄球菌、粪肠球菌和大肠杆菌的抑制活性, 发现与噁唑烷酮类上市药物利奈唑胺相比, 目标化合物均显示出更低的抗菌活性, 最低抑制浓度(MIC)大于32 mg/L, 这些试验结果表明异噁唑母核的5-位缺乏sp3杂化结构, 可能会导致抗菌活性的显著降低. 相似文献
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吡唑衍生物的合成及生物活性 总被引:15,自引:2,他引:15
以5-吡唑甲酰肼(7,8)为原料合成了4类共30种新化合物,这些化合物的结构均经^1H NMR,元素分析证实,部分化合物还经过了MS、IR确证,对大部分化合物做了生物活性测试,结果表明均具有一定的杀菌和除草活性。 相似文献