共查询到18条相似文献,搜索用时 78 毫秒
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含取代嘧啶环的苯磺酰脲的合成和生物活性测定 总被引:18,自引:1,他引:18
报道了12种含不同取代嘧啶环的苯磺酰脲的合成及初步的生物活性测定结果,其中10种为新化合物,结构经^1HNMR,IR和元素分析等证实。 相似文献
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新磺酰脲类化合物的合成及生物活性 总被引:7,自引:0,他引:7
以正在开发的新磷磺酰脲除草剂N-[2′-(4′-甲基)嘧啶基]-2-硝基苯磺酰脲的研究为基础,设计合成了19个脲桥经修饰的磺酰脲类化合物以及3个新型嘧啶中间体,产物结构经1HNMR谱及元素分析确证.盆栽试验和离休ALS酶研究结果表明,所合成的化合物均表现出一定的除草活性,部分化合物的除草活性较好. 相似文献
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以较高活性的单取代苯磺酰脲为基础,设计合成了14个新的含烷硫基和烷胺基嘧啶环的单取代苯磺酰脲化合物,其结构经1HNMR及元素分析确证.用油菜根长法测定IC50,并进行盆栽除草活性测试,结果表明,嘧啶环4位取代基的变化对分子除草活性影响较大,活性大致按烷氧基、烷硫基和烷胺基的顺序递减. 相似文献
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Synthesis and Herbicidal Activity of Novel Sulfonylureas Containing Thiadiazol Moiety 总被引:1,自引:0,他引:1
Thirteen novel sulfonylureas containing thiadiazole moiety were synthesized in a two-step reaction. Their structures were determined using IR, ^1H NMR, HRFTMS, and elemental analysis. Herbicidal activities of these compounds were determined in the green house bio-assay. The results show that four compounds among them exhibit some activity toward four tested herbs. 相似文献
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HUA Xuewen ZHOU Sha CHEN Minggui ZHANG Dongkai LIU Ming LIU Jingbo WU Changchun LIU Yang LI Yonghong LI Zhengming 《高等学校化学研究》2016,32(3):396-401
To develop novel sulfonylurea herbicides, a series of chlorsulfuron derivatives was designed and synthesized through introducing tetrahydrophthalimide substructure taken from protoporphyrinogen IX oxidase(PPO) inhibitors onto the critical 5-position of the classical benzene ring. The structures of title compounds were confirmed by infrared spectroscopy, ultraviolet spectroscopy, 1H and 13C NMR spectrometry, mass spectrometry and elemental analysis. In addition, the crystal structure of compound II-5 was further determined by X-ray diffraction analysis. Bioassay results showed that individual compounds exhibited good herbicidal activities, especially compound II-8, which displayed 100% inhibition rate against Echinochloa crusgalli at 150 g/ha(1 ha=104 m2) with the method of foliage spray in the pot experiment. 相似文献
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为了寻找高效的磺酰脲类除草剂, 以商品化磺酰脲类除草剂为基础, 将单取代嘧啶结构引入到分子中, 合成了一系列新型磺酰脲类化合物, 并通过1H NMR和高分辨质谱确定了其结构. 采用盆栽法和平皿法测试了所有化合物的除草活性以及部分化合物对油菜的IC50值. 结果表明, 一些化合物具有一定的除草活性, 其中化合物7b和7d对油菜和反枝苋具有较好的抑制活性. 相似文献
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ZHANG Dongkai HUA Xuewen LIU Ming WU Changchun WEI Wei LIU Yang CHEN Minggui ZHOU Sha LI Yonghong LI Zhengming 《高等学校化学研究》2016,32(4):607-614
Three novel series of 5-substituted sulfonylurea derivatives were designed and synthesized via introducing a triazole or oxadiazole ring at the 5th position of the benzene ring in classical sulfonylurea herbicides. All the target compounds were confirmed by means of 1H nuclear magnetic resonance(NMR), 13C NMR and elemental analysis. The bioassay results show that the target compounds containing an oxadiazole ring at the 5th position display moderate to excellent herbicidal activities against Brassica campestris and Amaranthus retroflexus under soil treatment. Especially, compounds zdk20, zdk21 and zdk22 possess 98.6%, 96.5% and 94.5% inhibition rates, respectively, against Amaranthus retroflexus at a concentration of 75 g/ha(1 ha=1×104 m2) under soil treatment, which approach to those of the commercial herbicide chlorsulfuron. 相似文献
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A series of new sulfonylureas incorporating 1,2,4-triazolinone moiety was synthesized, which were further bio-assayed for the herbicidal activity against four herbs, representative of monocotyledons and dicotyledons. Some of them exhibited high potency to inhibit the growth of dicotyledons(Bassica napus and Amaranthus retroflexus) in the pot experiment. Compounds 9a and 9b also displayed an excellent herbicidal activity against Bassica napus at a concentration of 15 g/hectare, which were comparable with commercial triasulfuron. 相似文献
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含嘧啶环的新拟除虫菊酯的合成及其生物活性的研究 总被引:2,自引:0,他引:2
拟除虫菊酯是一类高效、低毒、广谱性杀虫剂。嘧啶环是生物分子和医药中有较好活性的基团。本文拟在菊酯分子中引入嘧啶杂环,并测试其生物活性。我们以β-二酮为起始原料,分别与尿素、甲酰胺和脒缩合关环形成嘧啶,并进一步合成含嘧啶环的新拟除虫菊酯。所合成化合物的生物试验表明其中一些化合物对家蝇具有较好的击倒效应和杀虫效能。 相似文献
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新型金属卟啉的合成及其仿酶活性研究 总被引:19,自引:0,他引:19
合成并表征了一系列水溶性和非水溶性金属卟啉3a~3e,5a~5f和8a~8f;测试了这些金属卟啉作为超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的模拟物催化歧化O2-和催化分解H2O2等有毒氧自由基的活性及抗脂质过氧化性质.结果表明,含有吡啶溴化盐的水溶性金属卟啉8a~8f的仿酶活性明显大于含有羟基的非水溶性金属卟啉3a~3e和含有酯基的金属卟啉5a~5f. 相似文献
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新型吡唑甲酰脲类化合物的合成及其生物活性 总被引:3,自引:0,他引:3
5-氯-1,3-二甲基吡唑-4-甲酰基异氰酸酯同胺类化合物反应,合成了23个新型吡唑甲酰脲类化合物,其化学结构经IR、1HNMR、MS和元素分析确证。所有化合物均具有一定的杀菌活性,部分化合物具有较好的杀虫活性。 相似文献