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3-取代苄氧基-6-(取代-1H-吡唑-1-基)哒嗪的合成与生物活性 总被引:4,自引:0,他引:4
3-氯-6-肼基哒嗪分别与乙酰丙酮和3-二甲胺基丙烯醛反应, 合成了中间体3-氯-6-(3,5-二甲基-1H-吡唑-1-基)哒嗪(2)和3-氯-6-(1H-吡唑-1-基)哒嗪(4), 它们与多种取代苄醇反应, 得到了一系列未见报道的3-取代苄氧基-6-(取代-1H-吡唑-1-基)哒嗪, 其结构均经1H NMR, IR和元素分析确证. 初步的生物活性测试结果表明, 所合成的化合物对油菜和稗草均具有一定的抑制作用. 相似文献
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以乙醇为溶剂,冰醋酸为催化剂,4-氨基-5-(1-苯基-3-甲基-5-氯吡唑)-1,2,4-三唑-3-硫酮(1)与芳醛经缩合反应合成了7个新型的4-取代苯次甲亚胺-5-(1-苯基-3-甲基-5-氯吡唑)-4H-1,2,4-三唑-3-硫酮(3a~3g),收率66%~74%,其结构经1H NMR,IR及元素分析表征。合成4-(苯次甲亚胺)-5-(1-苯基-3-甲基-5-氯吡唑)-2H-1,2,4-三唑-3-硫酮(3a)的最佳反应条件为:以乙醇为溶剂,乙酸为催化剂,1 10 mmol,n(苯甲醛)∶n(1)=1.2,于75℃反应3 h,产率74%。 相似文献
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以N-(1-苯基-3-甲基-5-氯)吡唑甲酰肼基二硫代甲酸钾和水合肼为起始原料,经闭环反应制得4-氨基-5-(1-苯基-3-甲基-5-氯吡唑)-1,2,4-三唑-3-硫酮(2);2与对溴苯甲醛经缩合反应得4-(4-溴苯次甲亚胺)-5-(1-苯基-3-甲基-5-氯吡唑)-1,2,4-三唑-3-硫酮(3);以乙醇为溶剂,3在甲醛溶液中与吗啉于75℃反应4 h合成了新化合物——2-(吗啉亚甲基)-4-(4-溴苯次甲亚胺)-5-(1-苯基-3-甲基-5-氯吡唑)-1,2,4-三唑-3-硫酮,总收率37%,其结构经1H NMR,IR和元素分析表征。 相似文献
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以N-吡啶基吡唑甲酸和2-氨基-3-甲基苯甲酸为起始原料,经由亲核加成、环化和酰化等多步反应合成了一系列结构新颖的N-(2-(5-(3-溴-1-(3-氯吡啶-2-基)-1H-吡唑-5-基)-1,3,4-噁二唑-2-基)-4-氯-6-甲基苯基)酰胺类化合物.测试了所合成化合物的杀虫及抑菌活性,结果表明,新化合物大多化合物在200 mg·L^-1浓度下对东方粘虫(Mythimna separataWalker)具有一定的杀虫活性,尤其是N-(2-(5-(3-溴-1-(3-氯吡啶-2-基)-1H-吡唑-5-基)-1,3,4-噁二唑-2-基)-4-氯-6-甲基苯基)乙酰胺(8a)和N-(2-(5-(3-溴-1-(3-氯吡啶-2-基)-1H-吡唑-5-基)-1,3,4-噁二唑-2-基)-4-氯-6-甲基苯基)-3-氯-2,2-二甲基丙酰胺(8e)致死率可达70%;部分化合物在50 mg·L^-1浓度下对油菜菌核病菌的抑菌活性相对较好(54.5%~63.6%),优于triadimefon和chlorantraniliprole;部分化合物如N-(2-(5-(3-溴-1-(3-氯吡啶-2-基)-1H-吡唑-5-基)-1,3,4-噁二唑-2-基)-4-氯-6-甲基苯基)-3,3-二甲基丁酰胺80和N-(2-(5-(3-溴-1-(3-氯吡啶-2-基)-1H-吡唑-5-基)-1,3,4-噁二唑-2-基)-4-氯-6-甲基苯基)-4-氟苯甲酰胺(8h)对苹果轮纹病菌具有中等抑菌活性.值得注意的是,化合物8e的杀粘虫活性和对油菜菌核病菌的抑菌活性都较为突出,可用作新农药创制研究的新型参考结构. 相似文献
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《有机化学》2017,(8)
以2,3-二氯吡啶和水合肼为起始原料,经取代、缩合、氧化、醚化、成环和开环等多步反应合成一系列结构新颖的含多氟烷基吡唑环的邻甲酰氨基苯甲酰胺类化合物,结构经1H NMR和HRMS确证,并测试了目标化合物的杀虫活性.杀虫活性结果表明,在浓度0.8 mg/L下,大部分化合物对粘虫(Mythimna separata Walker)具有100%杀虫活性;在浓度2 mg/L下,N-(4-氯-2-(异丙基氨基甲酰)-6-甲基苯基)-1-(3-氯吡啶-2-基)-3-((1-甲基-3-五氟乙基-4-三氟甲基-1H-吡唑-5-基)氧基)-1H-吡唑-5-酰胺(8c)和N-(4-氯-2-(环丙基氨基甲酰)-6-甲基苯基)-1-(3-氯吡啶-2-基)-3-((1-甲基-3-五氟乙基-4-三氟甲基-1H-吡唑-5-基)氧基)-1H-吡唑-5-酰胺(8d)对斜纹夜蛾(Prodenia litura Fabricius)杀虫活性大于60%;在浓度0.08 mg/L下,N-(4-氯-2-(二甲基氨基甲酰)-6-甲基苯基)-1-(3-氯吡啶-2-基)-3-((1-甲基-3-五氟乙基-4-三氟甲基-1H-吡唑-5-基)氧基)-1H-吡唑-5-酰胺(8l)对小菜蛾(Plutella xylostella Linnaeus)杀虫活性达到82.5%. 相似文献
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在酸催化及脱水作用下,以2-(4-二丁基氨基-2-羟基苯甲酰基)苯甲酸或2-(4-二乙基氨基-2-羟基苯甲酰基)苯甲酸和吡唑啉酮为原料,通过Knoevenagel缩合和脱水反应,合成了一系列新型螺[色烯并(2,3-c)吡唑-4,1’-异苯并呋喃]-3’-酮类化合物.考察了反应物配比、催化剂、温度和时间等因素对反应的影响,初步探究了所合成化合物在不同pH、溶剂中的光学性能,其中1-(4-氯苯基)-7-(二乙基氨基)-3-甲基-1H,3’H-螺[色烯并[2,3-c]吡唑-4,1’-异苯并呋喃]-3’-酮(1e)和1-(4-氯苯基)-7-(二丁基氨基)-3-甲基-1H,3’H-螺[色烯并[2,3-c]吡唑-4,1’-异苯并呋喃]-3’-酮(1j)有潜力作为强酸强碱的pH指示剂. 相似文献
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超声辐射下合成1-[(未)取代苯酰基-3-[5-(1-苯基-3-甲基-5-氯吡唑-4-基)-1,3,4-噻二唑-2-基]-硫脲 总被引:2,自引:0,他引:2
1-苯基-3-甲基-5-氯吡唑-4-甲酸与氨基硫脲在三氯氧磷中反应得到2-氨基-5-(1-苯基-3-甲基-5-氯吡唑-4-基)-1,3,4-噻二唑(1), 然后分别采用超声辐射法和常规加热法与(未)取代苯甲酰基异硫氰酸酯(2)反应合成了一系列未见报到的1-[(未)取代苯酰基-3-[5-(1-苯基-3-甲基-5-氯吡唑-4-基)-1,3,4-噻二唑-2-基]-硫脲(3a~3j). 化合物的结构经元素分析, IR, 1H NMR确证. 相似文献
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A simple, novel, and efficient route for the synthesis of 5-amino-3-aryl-1-(tert-butyl)-1H-pyrazole-4-carboxamides 1 has been devised. Preparation of pyrazole bromide 3 from potassium tricyanomethanide can be accomplished in only two steps in good yield and features a selective Sandmeyer reaction on the corresponding diaminopyrazole. This allows for a more versatile synthesis of 5-amino-3-aryl-1-(tert-butyl)-1H-pyrazole-4-carboxamides 1 than was previously possible. 相似文献
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Development of efficient, scalable routes for the synthesis of (S)-3-[5-(3,4-dichlorophenyl)-1-(4-methoxyphenyl)-1H-pyrazol-3-yl]-2-m-tolyl propionic acid, a selective cholecystokinin 1 (CCK 1) receptor antagonist, is described. A key feature of the scale-up route is a concise construction of the complete pyrazole framework in a single step by reacting an aryl hydrazine with an elaborated acetylenic ketone. This route was then further refined incorporating efficient enantioselective strategies to obtain the desired S-enantiomer in high optical purity. The first strategy involved an efficient, recyclable, kinetic resolution by enzyme-catalyzed hydrolysis of the racemic ester. In the second-generation route, the requisite stereochemistry at the chiral center was generated at an early stage in the synthesis involving a remarkable diastereoselective addition of inexpensive (S)-(-)-ethyl lactate to an alkylaryl ketene. Both methods furnished optically pure (>99% ee) final drug substance as its crystalline sodium salt. 相似文献
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在Ft抖作为碱的温和条件下,5-(S)-孟氧基-3,4-二卤-2(5H)-呋喃酮与芳香胺4-硝基邻苯二胺发生串联的Michael加成-消除反应,生成了新的含有苯环结构的5-孟氧基-4-氨基-3-卤-2(5H)-呋喃酮类化合物。新化合物的结构通过紫外-可见光谱(UV-Vis)、红外光谱(IR)、质谱(MS)、核磁共振氢谱(1HNMR)、核磁共振碳谱(13CNMR)和元素分析等表征证实。该多环结构卤代2(5H)-呋喃酮化合物的合成,能为某些多官能团的结构复杂的2(5H)-呋喃酮化合物的合成提供新途径。 相似文献
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2-乙酰基吡啶1经溴化反应后得到2-(2-溴乙酰基)吡啶氢溴酸盐2,2在水中与NaHCO3发生中和反应生成2-(2-溴乙酰基)吡啶,不经分离直接于水中和2-氨基吡啶衍生物3a-3h反应生成2-吡啶基咪唑并[1,2-a]吡啶4a-4h.采用核磁共振谱仪、红外光谱仪及质谱仪表征了产物的结构.结果表明,利用该方法可以在温和的反应条件下高产率得到目标产物,且方法操作简便、对环境友好. 相似文献
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次氯酸钠在2,2,6,6-四甲基哌啶氧化物(TEMPO)的催化下,可在温和的条件下选择性氧化胆酸类化合物的C3位羟基.该方法提供了与常规的氧化剂相反的区域选择性,为胆酸类化合物的结构改造提供了简洁的路线. 相似文献
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I. I. Grandberg L. F. Morozova V. A. Moskalenko A. N. Kost 《Chemistry of Heterocyclic Compounds》1972,5(6):792-796
The possibility of the separation into optical antipodes of racemic amino acids of the pyrazole series has been investigated. The trans configuration of the acrylic acids obtained as by-products in the synthesis of -amino acids of the pyrazole series by the Rodionov reaction has been shown by PMR and IR spectroscopy. The IR spectra of a series of amino acids are discussed.For part LXII, see [1]. 相似文献
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Rodinovskaya L. A. Gromova A. V. Shestopalov A. M. Nesterov V. N. 《Russian Chemical Bulletin》2003,52(10):2207-2213
Substituted 3-hydroxypyrazoles, which were prepared based on ethyl esters of substituted 4-(pyridin-2-ylthio)- or 4-(1,4-dihydropyridin-2-ylthio)acetoacetic acids and hydrazine hydrate, were used in the synthesis of 6-amino-4-aryl-5-cyano-3-(pyridin-2-ylthiomethyl)-2,4-dihydropyrano[2,3-c]pyrazoles. The molecular and crystal structure of 6-amino-5-cyano-3-(3-cyano-4,6-dimethylpyridin-2-ylthiomethyl)-4-(2-nitrophenyl)-2,4-dihydropyrano[2,3-c]pyrazole was established by X-ray diffraction analysis. 相似文献
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The synthesis of 1-aryl-5-cyano-1H-pyrazole-4-carboxylic acid, ethyl esters 1 is described. Subsequent chemistry led to relatively simple and unique pyrazole derivatives. Most important of these are 1-aryl-5-(aminocarbonyl)-1H-pyrazole-4-carboxylic acids 2, which are chemical hybridizing agents in wheat and barley. The regioselective hydrolysis of 1-(3-chlorophenyl)-1H-pyrazole-4,5-dicarboxylic acid, dimethyl ester (7b) and subsequent chemistry is also described. 相似文献
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Faryal Chaudhry Sadia Naureen Fatima Ijaz Munawar Ali Munawar Misbahul Ain Khan 《合成通讯》2017,47(4):310-318
This newly designed route assembled a pyrazole ring with an aldehydic functionality over another pyrazole moiety. Further, formyl group was exploited in different routes such as condensation reactions, imidazole and pyrimidone/thione synthesis. The present reactions were performed with glycine, a facile catalyst, and the results were compared well with those of conventional methods. 相似文献