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1.
研究了3-芳基-4-氨基-5-巯基-1,2,4-三唑与6-/8-取代-4-羟基喹啉-3-酸在三氯氧磷催化下的反应,制得16个的3-芳基-6-(6-/8-取代-4-氯喹啉-3-基)1,2-4,-三唑[3,4-b)-1,3,4-噻二唑,新化合物的结构通过元素分析,IR,^1H NMR和MS确定,讨论了其波谱性质。  相似文献   

2.
以2-氨基对苯二甲酸(1)为起始原料,与乙酸酐缩合生成7-羧基乙酰苯邻 甲内酰胺(2);2和芳胺缩合产生7-羧基-2-甲基-3-芳基-4(3H)-喹唑啉 酮(3);3和N,N-双环己基碳双亚胺(DCC)加成得到中间体4,4在4-二甲氨基 吡啶(DMAP)催化下和5,5-二甲基-1,3-环己二酮(5)缩合得到目标产物2- 甲基-3-芳基-7-(5,5-二甲基-3-酮-1-环己烯-1-基)甲酸酯-4( 3H)-喹唑啉酮(6)。所得15个新型化合物的结构均经^1H NMR、元素分析确证, 部分化合物经IC/MSD确证。  相似文献   

3.
首次报道3-芳基-4-氨基-5-巯基-1,2,4-三唑与三氯乙酸在三氯氧磷 存在下关环,合成了3-芳基-6-三氯甲基-1,2,4-三唑并[3,4-b]-1,3,4 -噻二唑,标题化合物结构经元素分析、红外光谱、核磁共振氢谱、碳谱与质谱确 证。  相似文献   

4.
报道了6-O-对甲苯磺酰基-1,2:3,4-二-O-异亚丙基-α-D吡喃型半 乳糖(3)与取代的3-巯基三唑或5-巯基四唑4a-4c或5a-5f的亲核取代反应,合 成了9个6-S-(取代的三或四唑杂环基)-1,2:3,4-二-O-异亚丙基-α- D吡喃型半乳糖(6a-6i),通过元素分析,IR,NMR和MS确证了上述化合物的结构 ,并经分子模型计算进行了其构象分析。  相似文献   

5.
曹玲华  张林  顾军 《有机化学》2002,22(6):405-410
报道了3-甲酰基色酮经Jones试剂氧化后得到3-羧基色酮,再与3-芳基-4 -氨基-5-硫酮-1,2,4-三唑在POCl3作用下,得到一系列3-(3′-芳基- 5′-硫酮-1′,2′,4′-三唑-′-基)-氨甲酰基色酮类化合物。所有化合 物的结构均经IR,LCMS,^1HNMR,元素分析确证。  相似文献   

6.
以间二氯苯与氯乙酰氯反应,生成ω-氯代-2,4-二氯苯乙酮(1),再使之分别与3-烷基/芳基-4-氨基-5-巯基-1,2,4-三唑(2a~2l)反应,合成了12种新的3-烷基/芳基-6-(2′,4′-二氯苯基)-7H-1,2,4-三唑并[3,4-b]1,3,4-噻二嗪(4a~4l).利用EA,IR,1H NMR确定了其结构,并提出该反应的可能机制.  相似文献   

7.
陈文彬  金桂玉 《应用化学》2002,19(6):527-530
利用1,3-二芳基-2-[(1H-1,2,4-三唑-1-基)甲基]-2-丙烯-1-酮7与取代硫酚进行1,4-亲核加成,经重排得到化合物4,将化合物4用NaBH4还原,得到目标化合物5,其结构经元素分析、^1H NMR和红外光谱所确证,并测试化合物5对小麦锈病的活性,结果发现大部分化合物的杀菌活性均较低。  相似文献   

8.
α,β-不饱和酮(1a-1e)与邻氨基苯硫酚反应,得到含2-苯基-1,2,3-三唑基1,5-苯并硫氮杂卓(2a-2e),然后以此化合物为原料同1,3-偶极子氧化腈“现场”发生1,3-偶极环加成,合成出一系列含2-苯基-1,2,3-三唑基的1,2,4-恶二唑并合的1,5-苯并硫氮杂卓衍生物(3a-3j)。产物经元素分析、IR、^1H NMR及MS加以确证。  相似文献   

9.
3-芳基-5,6-二氢噻唑并[2,3-C]均三唑和3-芳基-6,7-二氢均三唑并[3,4-b][1,3]噻嗪的合成王忠义,史海健,史好新(安徽师范大学化学系,芜湖241000)张自义(兰州大学化学系)三唑类化合物具有相当广泛的生物活性,如:抗菌、抗痉...  相似文献   

10.
刘方明  王宝雷等 《化学学报》2002,60(6):1095-1101
α,β-不饱和酮(1a-1e)与邻氨基苯硫酚反应,得到含2-苯基-1,2,3-三唑基的1,5-苯并硫氮杂Zhuo(2a-2e),然后以其为原料与烯酮“现场”进行[2 2]环加成,合成出一系列含2-苯基-1,2,3-三唑基的β-内酰胺并合的1,5-苯并硫氮杂Zhuo衍生物(3a-3j),产物经^1H NMR,IR,元素分析及MS加以确证。  相似文献   

11.
以间二氯苯与氯乙酰氯反应,生成ω-氯代-2,4-二氯苯乙酮(1),再使之分别与3-烷基/芳基-4-氨基-5-巯基-1,2,4-三唑(2a~2l)反应,合成了12种新的3-烷基/芳基-6-(2',4'-二氯苯基)-7H-1,2,4-三唑并[3,4-b]1,3,4-噻二嗪(4a~4l)。利用EA,IR,^1HNMR确定了其结构,并提出该反应的可能机制。  相似文献   

12.
Four stereoisomers of 3,5-bis(2-hydroxybut-3-en-1-yl)-1,2,4-thiadiazole, named insatindigothiadiazoles A–D(1a–1d), were isolated from the roots of Isatis indigotica. Their structures were determined by spectroscopic analysis; specifically, the absolute configurations were assigned by using the MPA determination rule based on Δδ~(RS)values of MPA esters, and supported by electronic CD(ECD)calculations. Proposed biosynthetic pathways and preliminary investigations of the biological activities of 1a–1d against influenza virus A(H3N2), Coxsackie virus B3, and/or HSV-1 are also discussed.  相似文献   

13.
以3,3-二甲基-1-(1H-1,2,4-三唑基)-2-丁酮肟为原料,经醚化、肼解及腙化3步反应得到(E)-N'-(取代苯亚甲基)-2-[(Z)-3,3-二甲基-1-(1H-1,2,4-三唑-1-基)丁基-2-亚甲氨氧基]乙酰肼(3a~3u),化合物3与二乙酸碘苯(IBD)反应,合成了21个(Z)-3,3-二甲基-1-(1H-1,2,4-三唑-1-基)-2-丁酮肟-(5-芳基-1,3,4-噁二唑-2-基)甲基醚(4a~4u),化合物4的化学结构经核磁共振谱、高分辨质谱和元素分析确证.采用单晶X射线衍射仪测定了化合物4c的晶体结构.抑菌活性测试结果表明,在500 mg/L浓度下,化合物4k,4f,4j和4n对纹枯病菌的防效率分别为70.9%,60.2%,60.0%和60.6%;在25 mg/L浓度下,化合物4b,4c,4d和4e对菌核病菌的抑制率为71.8%~76.9%.  相似文献   

14.
Abstract

Herein, we describe a one-pot synthesis of some novel 2-(3-alkyl/aryl-5-trifluoromethylpyrazol-1-yl)-4-(coumarin-3-yl)thiazoles (6) involving the reaction of 3-alkyl/aryl-5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazole-1-thiocarboxamides (3) with 3-bromoacetylcoumarins (5) in the presence of sodium carbonate in ethanol. Reaction of 3 with 5 in the absence of sodium carbonate, however, resulted in the formation of 2-(3-alkyl/aryl-5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazol-1-yl)-4-(coumarin-3-yl)thiazoles, which were subsequently dehydrated to 6 by refluxing in ethanol in the presence of sodium carbonate. The structure of the synthesized compounds (6) was confirmed by infrared (IR), mass, 1H NMR, and 13C NMR spectra and elemental analysis data. Newly synthesized compounds (6) showed moderate to good activity against Gram-positive bacteria.  相似文献   

15.
以2-巯基苯并咪唑(1)为原料,经缩合和还原得到2-(4-氨基苯硫基)苯并咪唑(3),再与异硫氰酸苯甲酰酯或异硫氰酸烃基酯反应得到取代硫脲(5和7),最后与卤代烃反应得到20个新的S-烃基-1-烃基-3-[4-(苯并咪唑-2-巯基)苯基]异硫脲化合物(6和8),其结构经IR,1HNMR,MS及元素分析确证.初步的药理试验表明,20个目标化合物均有不同程度的iNOS抑制活性,其中化合物6b,8d和8f的iNOS抑制活性与阳性对照药氨基胍相当.  相似文献   

16.
The crystal structure of the title compound 1-(4-fluorophenyl) -2-hexylthio-benzo [4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a]pyrimidin-5(1H) -one(C23H21FN4O2S,Mr = 436.5) has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic,space group P21/n with a = 13.9854(3) ,b = 17.2678(4) ,c = 18.1828(5) ,β = 99.364(2) °,V = 4332.58(18) 3,Z = 4,Dc = 1.338,F(000) =1824,μ = 0.185 mm-1,MoKa radiation(λ = 0.71073) ,R = 0.0538 and wR = 0.1162 for 4728 observed reflections with I > 2σ(I) . X-ray diffraction analysis reveals the fused rings of benzo[4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a] pyrimidin-5(1H) -one system are nearly coplanar. The crystal packing is mainly stabilized by weak intermolecular C-H···O hydrogen bond and π-π interactions.  相似文献   

17.
研究了3-(2'-苯基-1', 2', 3'-连三唑-4'-基)-4-氨基-5-巯基-1, 2, 4-三唑(1)与取代苯甲酸和脂肪酸(2a-r)在POCl3催化下的反应, 共合成得到18个新的3-(2'-苯基-1', 2', 3'-连三唑-4'-基)-6-烷基/芳基-均三唑并[3, 4-b]-1, 3, 4-噻二唑(3a-r), 经元素分析,IR, 1H NMR和MS进行了结构确证。  相似文献   

18.
新型1,2,4-三唑[3,4-b]-1,3,4-噻二嗪的合成及表征   总被引:2,自引:1,他引:2  
以3-(2-苯基-1,2,3-三唑-4-基)-4-氨基-5-巯基-1,2,4-三唑(1)为原料分别与ω-溴代芳基乙酮、ω-溴代-ω-(1H-1,2,4-三 唑-1-基)芳基乙酮反应, 合成了一系列新的1,2,4-三唑[3,4-b]-1,3,4-噻二嗪类化合物2a2e3a3e. 其结构经IR, 1H NMR和MS及元素分析确证.  相似文献   

19.
1 INTRODUCTION Heterocyclic compounds bearing the 1,2,4-tri- azole moiety have attracted considerable attention over the past few decades since they exhibit some fungicidal activities against Puccinia recondite and applications in the field of root-growth regu- lation[1~3]. Meanwhile, 4-amino-5-mercapto-1,2, 4-triazole moiety has great versatility in fusing tovarious ring systems and possesses a broad spec- trum of biological activities[4, 5]. In our con- tinuous work directed towards the…  相似文献   

20.
A novel compound 5-(p-tolyl)-4-[2-(2,4-dichlorophenoxy)acetamido]-1,2,4-tria zole- 3-thione 2a has been synthesized by the reaction of 5-(p-tolyl)-4-amino-1,2,4-triazole-3-thione 1 with 2-(2,4-dich/orophenoxy)acetyl ch/oride. Interestingly, the title compound 2 was obtained when 2a crystallizes from a mixed solution of petroleum ether and ethyl acetate, and it has been characterized by elemental analysis, IR, ^1H NMR spectra and single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 9.780(5), b = 10.876(6), c = 11.615(6) /A, a = 104.822(7), β= 94.105(6), ), = 94.305(6)°, V= 1185.7(11)/A3, Z = 2,μ = 0.397 mm^-1, Mr= 497.39, Dx= 1.393 g/cm^3, F(000) = 516, S = 1.097, the final R = 0.0730 and wR = 0.2133 for 4111 unique reflections (Rint = 0.0525) with 3212 observed ones. The dihedral angles made by the triazole ring with the methyl- and chloro-substituted benzene rings are 43.5(7) and 50.2(9)°, respectively. Some intra- and intermolecular hydrogen bonds together with C-H…π interactions existing in the lattice stabilize the crystal structure.  相似文献   

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